HP COMPAQ DC5750 Service & Reference Manual
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HP COMPAQ DC5750 Service & Reference Manual

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HP Compaq dc5750 Business PC
1st Edition
This document provides information on the removal and replacement of all
parts as well as information on troubleshooting, Desktop Management, setup
utilities, SATA drives, safety, routine care, connector pin assignments, POST
error messages, and diagnostic indicator lights.
Document Part Number 437963-001

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Summary of Contents for HP COMPAQ DC5750

  • Page 1 HP Compaq dc5750 Business PC 1st Edition This document provides information on the removal and replacement of all parts as well as information on troubleshooting, Desktop Management, setup utilities, SATA drives, safety, routine care, connector pin assignments, POST error messages, and diagnostic indicator lights.

  • Page 3: Service Reference Guide

    Service Reference Guide HP Compaq dc5750 Business PC 1st Edition Document Part Number: 437963-001 November 2006...
  • Page 4 UNIX is a registered trademark of The Open Group. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

  • Page 5: Table Of Contents

    3.3.7 HP OpenView Client Configuration Manager ........3–6...
  • Page 6 3.4.6 HP Web Site Support ........
  • Page 7 5.5.2 Tools and Software Requirements ......... . . 5–7 5.5.3 Screws .
  • Page 8 Contents 7.7.2 Optical Drive ............7–9 7.7.3 External 3.5-inch Drive .

  • Page 9: Installing The Operating System

    This action points the operating system to the appropriate drivers. Obtain the latest support software, including support software for the operating system from www.hp.com/support . Select the appropriate country and language then, select Download drivers and software, enter the model number of the computer, and press You can also obtain the latest support software on CDs.

  • Page 10: Transferring Files And Settings

    3. Follow the instructions in the wizard. The HP Backup and Recovery Manager can be used to back up data and system files to the hard drive, to network drives, or to removable media, such as CDs, DVDs, or flash media. If data or system files are lost, deleted, or corrupted, Backup and Recovery Manager allows you to retrieve data or restore the last good system image.

  • Page 11: Setup Utilities And Diagnostics Features

    Establish and manage energy-saving timeouts. ✎ All features identified in this chapter may not be available on all HP products. Power-On Self-Test (POST) POST is a series of diagnostic tests that runs automatically when the system is turned on. POST checks the following items to ensure that the computer system is functioning properly: ■...

  • Page 12: Computer Setup Utilities

    Setup Utilities and Diagnostics Features 2.2 Computer Setup Utilities Use Computer Setup Utilities (F10) to: ■ Change factory default settings. ■ Set the system date and time. ■ Set, view, change, or verify the system configuration, including settings for processor, graphics, memory, audio, storage, communications, and input devices.

  • Page 13: Using Computer Setup (F10) Utilities

    2.2.1 Using Computer Setup (F10) Utilities Computer Setup can be accessed only by turning on the computer or restarting the system. To access the Computer Setup Utilities menu, complete the following steps: 1. Turn on or restart the computer. If you are in Windows, click Start >Shut Down >Restart. 2.

  • Page 14: Computer Setup Menu

    Setup Utilities and Diagnostics Features 2.2.2 Computer Setup Menu Heading Option File System Information About Set Time and Date Flash System ROM (some models) Replicated Setup Default Setup Apply Defaults and Exit Ignore Changes and Exit Save Changes and Exit ✎...

  • Page 15: Emulation Options

    Heading Option Storage Device Configuration ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 Description Lists all installed BIOS-controlled storage devices. When a device is selected, detailed information and options are displayed.
  • Page 16 Setup Utilities and Diagnostics Features Heading Option Storage Device (continued) Configuration (continued) Storage Options ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2–6 Description Multisector Transfers (ATA disks only) Specifies how many sectors are transferred per multi-sector PIO operation.
  • Page 17 Heading Option Storage Storage Options (continued) (continued) DPS Self-Test ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 Description SATA Emulation Allows you to choose how the SATA controller and devices are accessed by the operating system.
  • Page 18 Setup Utilities and Diagnostics Features Heading Option Storage Boot Order (continued) Security Smart Card Options (some models) Setup Password Power-On Password Password Options (This selection will appear only if a power-on password or setup password is set.) ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2–8 Description Allows you to:...
  • Page 19 Heading Option Security Embedded (continued) Security (This menu only appears after the Embedded Security Device is made available under Device Security) Device Security Network Service Boot System IDs DriveLock Security OS Security (some models) ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 Description Allows you to:...
  • Page 20 Setup Utilities and Diagnostics Features Heading Option Security Setup Security Level (continued) Power OS Power Management Hardware Power Management ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2–10 Description Provides a method to allow end-users limited access to change specified setup options without having to know the Setup Password.
  • Page 21 Heading Option Power Thermal (continued) Advanced* Power-On Options *For advanced users only ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 Description Fan idle mode - This bar graph controls the minimum permitted fan speed.
  • Page 22 Setup Utilities and Diagnostics Features Heading Option Advanced* Power-On Options (continued) (continued) *For advanced users only Onboard Devices PCI Devices PCI VGA Configuration ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. 2–12 Description Allows you to set: (continued) •...
  • Page 23 Heading Option Advanced* Bus Options* (continued) *For advanced users only Device Options ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Service Reference Guide, dc5750 Description On some models, allows you to enable or disable: •...

  • Page 24: Recovering The Configuration Settings

    The utility simplifies the process of effectively identifying, diagnosing, and isolating hardware issues. The Survey tab is displayed when you invoke HP Insight Diagnostics. This tab shows the current configuration of the computer. From the Survey tab, there is access to several categories of information about the computer.

  • Page 25: Accessing Hp Insight Diagnostics

    It is recommended that you accept the assigned default keyboard for your language unless you want to test your specific keyboard. 5. In the End User License Agreement page, click Agree if you agree with the terms. The HP Insight Diagnostics utility launches with the Survey tab displayed.

  • Page 26: Test Tab

    Setup Utilities and Diagnostics Features System—Shows information about the computer model, processor, chassis, and BIOS, plus internal speaker and PCI bus information. 2.3.3 Test Tab The Test tab allows you to choose various parts of the system to test. You can also choose the type of test and testing mode.

  • Page 27: Status Tab

    The Clear Error Log button will clear the contents of the Error Log. 2.3.6 Help Tab The Help tab contains an HP Insight Diagnostics tab, an Error Codes tab, and a Test Components tab. The HP Insight Diagnostics tab contains help topics and includes search and index features.

  • Page 28: Saving And Printing Information In Hp Insight Diagnostics

    You can save the information displayed in the HP Insight Diagnostics Status and Log tabs to a diskette or a USB 2.0 HP Drive Key (64MB or higher). You can not save to the hard drive. The system will automatically create an html file that has the same appearance as the information displayed on the screen.

  • Page 29: Desktop Management

    Support for specific features described in this guide may vary by model or software version. Initial Configuration and Deployment HP computers come with a preinstalled system software image. After a brief software “unbundling” process, the computer is ready to be used.

  • Page 30: Hp Openview Agent

    5. Scroll down and click on the link to install Altiris AClient. 3.1.3 HP Backup and Recovery Manager HP Backup and Recovery Manager can create the Restore Plus! CD set. This set includes the Restore Plus! CD, the Operating system CD, and any Supplemental Software CDs.

  • Page 31: Remote System Installation

    Configuring the system BIOS settings. To initiate Remote System Installation, press message appears in the lower-right corner of the HP logo screen. Follow the instructions on the screen to continue the process. The default boot order is a BIOS configuration setting that can be changed to always attempt to PXE boot.

  • Page 32: Hp System Software Manager

    HP System Software Manager (SSM) is a free utility that automates remote deployment of device drivers and BIOS updates for networked HP business PCs. When SSM runs, it silently (without user interaction) determines the revision levels of drivers and BIOS installed on each networked client system and compares this inventory against system software SoftPaqs that have been tested and stored in a central file store.

  • Page 33: Hp Protecttools Security Manager

    (some models only) be installed on your computer, and Smart Card Security for ProtectTools requires an optional smart card and reader. ProtectTools modules may be preinstalled, preloaded, or available for purchase from the HP Web http://www.hp.com/products/security site. Visit 3.3.5 HP Client Premium Suite...

  • Page 34: Hp Openview Client Configuration Manager

    Proven across enterprises of every size and complexity, HP’s adaptive, policy-based model for software Configuration Management, automates the entire software lifecycle management process - from discovery, deployment, and ongoing management through to migration and retirement.

  • Page 35: Subscriber's Choice

    Enabling the system administrator to perform this task remotely on multiple computers results in a consistent deployment of, and greater control over, HP PC BIOS images over the network. It also results in greater productivity and lower total cost of ownership.
  • Page 36 ✎ The computer must be powered on, or turned on through Remote Wakeup, to take advantage of Remote ROM Flash. For more information on Remote ROM Flash, refer to the HP Client Manager or System http://h18000.www1.hp.com/im/prodinfo.html Software Manager at 3–8...

  • Page 37: Hpqflash

    If the system successfully reprograms the ROM, the system will automatically power off. 4. Remove the removable media used to upgrade the BIOS. 5. Turn the power on to restart the computer. Service Reference Guide, dc5750 http://www.hp.com/support/files 437963-001 Desktop Management and enter the product...

  • Page 38: Replicating The Setup

    This allows for faster, more consistent configuration of multiple computers. ✎ Both procedures require a diskette drive or a supported USB flash media device, such as an HP Drive Key. Copying to Single Computer Ä...

  • Page 39: Copying To Multiple Computers

    , and enter the model number of the computer. 437963-001 Desktop Management “Supported USB Flash Media http://www.hp.com , click 3–1 1...

  • Page 40: Supported Usb Flash Media Device

    Supported devices have a preinstalled image to simplify the process of making them bootable. All HP or Compaq and most other USB flash media devices have this preinstalled image. If the USB flash media device being used does not have this image, use the procedure later in this section (see “Unsupported USB Flash Media...

  • Page 41: Unsupported Usb Flash Media Device

    10. At the A:\ prompt, enter Ä CAUTION: Be sure that you have entered the correct drive letter for the USB flash media device. FORMAT will display one or more warnings and ask you each time whether you want to proceed.

  • Page 42: Dual-State Power Button

    Desktop Management 6. Go to Advanced > PCI Devices to disable both the PATA and SATA controllers. When disabling the SATA controller, note the IRQ to which the controller is assigned. You will need to reassign the IRQ later. Exit setup, confirming the changes. SATA IRQ: __________ 7.

  • Page 43: Hp Web Site Support

    HP has made the task of locating, accessing, evaluating, and installing the latest support software easier. You can download the software from The Web site contains the latest device drivers, utilities, and flashable ROM images needed to run the latest Microsoft Windows operating system on the HP computer.

  • Page 44: Security Features Overview

    ✎ HP Embedded Security for ProtectTools, the Smart Cover Sensor, and the Smart Cover Lock are available as options on some systems. Use the following utilities to manage security settings on the HP computer: ■...
  • Page 45 Security Features Overview (Continued) Option Device Security Network Service Boot System IDs DriveLock (some models) ✎ For more information about Computer Setup, see the Computer Setup (F10) Utility Guide. Support for security features may vary depending on your specific computer configuration. Service Reference Guide, dc5750 Description Enables/disables serial ports, parallel port, front USB ports,...

  • Page 46: Password Security

    3.5.2 Establishing a Setup Password Using Computer Setup If the system is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at Setup prevents reconfigration of the computer (use of the Computer Setup (F10) utility) until the password is entered.

  • Page 47: Establishing A Power-On Password Using Computer Setup

    Entering a Setup Password If the system is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at If a setup password has been established on the computer, you will be prompted to enter it each time you run Computer Setup.

  • Page 48: Changing A Power-On Or Setup Password

    Desktop Management Changing a Power-On or Setup Password If the system is equipped with an embedded security device, refer to the HP ProtectTools Security Manager Guide at 1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.

  • Page 49: National Keyboard Delimiter Characters

    If you forget the password, you cannot access the computer. Refer to the Troubleshooting Guide on the Documentation and Diagnostics CD for instructions on clearing passwords. If the system is equiped with an embedded security device, refer to the HP ProtectTools Security www.hp.com Manager Guide at 3.5.4 DriveLock...

  • Page 50: Drivelock Applications

    DriveLock. Since the initial configuration of DriveLock is typically performed by a system administrator, a master password should be set first. HP encourages system administrators to set a master password whether they plan to enable DriveLock or keep it disabled.

  • Page 51: Smart Cover Lock

    4. Before exiting, select File > Save Changes and Exit. Smart Cover Lock The Smart Cover Lock is a software-controllable cover lock featured on some HP computers. This lock prevents unauthorized access to the internal components. Computers ship with the Smart Cover Lock in the unlocked position.

  • Page 52: Unlocking The Smart Cover Lock

    PC component failure (such as processor or power supply) ■ Forgotten password CAUTION: The Smart Cover FailSafe Key is a specialized tool available from HP. Be prepared; order Ä this key before you need one (Tamper-resistant wrench PN 166527-001 or tamper-resistant bits PN 166527-002).

  • Page 53: Fingerprint Identification Technology

    If the computer is connected to a network managed by HP Client Manager, the computer sends a fault notice to the network management application. With HP Client Manager, you can also remotely schedule diagnostics to automatically run on all managed PCs and create a summary report of failed tests.
  • Page 54 Desktop Management 3–26 437963-001 Service Reference Guide, dc5750...

  • Page 55: Sata Hard Drives

    Serial and Parallel ATA Drive Guidelines and ✎ Serial ATA = SATA Parallel ATA = PATA HP only supports the use of SATA drives on these models of computer. No PATA drives are supported on these models. SATA Hard Drives Serial ATA Hard Drive Characteristics...

  • Page 56: Sata Hard Drive Cables

    4.2 SATA Hard Drive Cables 4.2.1 SATA Data Cable Always use an HP approved SATA 3.0 Gb/s cable as it is fully backwards compatible with the SATA 1.5 Gb/s drives. Current HP desktop products ship with SATA 3.0 Gb/s hard drives.

  • Page 57: Pata Device Information

    No PATA drives are supported on these models. 4.4 ATA SMART Drives The Self Monitoring Analysis and Recording Technology (SMART) ATA drives for the HP Personal Computers have built-in drive failure prediction that warns the user or network administrator of an impending failure or crash of the hard drive. The SMART drive tracks fault prediction and failure indication parameters such as reallocated sector count, spin retry count, and calibration retry count.
  • Page 58 Serial and Parallel ATA Drive Guidelines and Features 4–4 437963-001 Service Reference Guide, dc5750...

  • Page 59: Identifying The Chassis, Routine Care, And Disassembly Preparation

    Identifying the Chassis, Routine Care, and This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service. CAUTION: When the computer is plugged into an AC power source, voltage is always applied to the Ä...

  • Page 60: Microtower (Mt)

    Identifying the Chassis, Routine Care, and Disassembly Preparation 5.1.2 Microtower (MT) 5–2 437963-001 Service Reference Guide, dc5750...

  • Page 61: Electrostatic Discharge Information

    5.2 Electrostatic Discharge Information A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly throughout a normal cycle.

  • Page 62: Personal Grounding Methods And Equipment

    Identifying the Chassis, Routine Care, and Disassembly Preparation 5.2.3 Personal Grounding Methods and Equipment Use the following equipment to prevent static electricity damage to equipment: ■ Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords.

  • Page 63: Operating Guidelines

    ■ Static awareness labels ■ Wrist straps and footwear straps providing one-megohm +/- 10% resistance ■ Material handling packages ■ Conductive plastic bags ■ Conductive plastic tubes ■ Conductive tote boxes ■ Opaque shielding bags ■ Transparent metallized shielding bags ■...

  • Page 64: Cleaning The Computer Case

    Identifying the Chassis, Routine Care, and Disassembly Preparation 2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean cloth and then use the cloth on the component. 3. Always unplug the computer when cleaning with liquids or damp cloths. 4.

  • Page 65: Cleaning The Monitor

    Phillips #2 screwdriver ■ Diagnostics software ■ HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or HP tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002) Service Reference Guide, dc5750 Identifying the Chassis, Routine Care, and Disassembly Preparation Section 5.4.2.

  • Page 66: Screws

    If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

  • Page 67: Lithium Coin Cell Battery

    Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP, their authorized partners, or their agents. Service Reference Guide, dc5750...
  • Page 68 Identifying the Chassis, Routine Care, and Disassembly Preparation 5–10 437963-001 Service Reference Guide, dc5750...

  • Page 69: Removal And Replacement Procedures-Microtower (Mt) Chassis

    Removal and Replacement Procedures— Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. ✎ Not all features listed in this guide are available on all computers. Preparation for Disassembly Chapter 5, “Identifying the Chassis, Routine Care, and Disassembly Preparation”...

  • Page 70: External Security Devices

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.2 External Security Devices 6.2.1 Installing a Cable Lock The cable lock may be used to secure the computer access panel to the chassis and, at the same time, secure the computer to a fixed object. Insert the cable lock in the location shown below.

  • Page 71: Installing A Padlock

    6.2.2 Installing a Padlock A padlock may be used by itself to secure the access panel to the computer chassis. A padlock may also be used with a security cable to secure the computer to a fixed object. Service Reference Guide, dc5750 Removal and Replacement Procedures—...

  • Page 72: Access Panel

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.3 Access Panel 1. Prepare the computer for disassembly Ä CAUTION: Before removing the computer access panel, ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet. 2.

  • Page 73: Front Bezel

    6.4 Front Bezel 1. Prepare the computer for disassembly 2. Remove the access panel 3. To remove the front bezel, press the green latch on the bottom right of the chassis 1 to release the bottom of the bezel, then swing the bottom of the bezel away from the chassis 2 to release the top of the bezel.
  • Page 74 Removal and Replacement Procedures— Microtower (MT) Chassis To reinstall the front bezel: 1. Position the chassis in the upright position. 2. Insert the two hooks on the top of the bezel into the rectangular holes on the chassis 1 then rotate the bottom of the bezel onto the chassis 2 so that the bottom two hooks on the bezel snap into place.

  • Page 75: Front Drive Bezels

    6.5 Front Drive Bezels Follow these steps before removing or installing a front drive bezel. 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the front bezel 4. Press the two retaining tabs on the inside of the bezel towards the outer edge of the bezel 1 and pull the bezel blank inwards to remove it 2.

  • Page 76: Cable Management

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.6 Cable Management Always follow good cable management practices when working inside the computer. ■ Keep cables away from major heat sources like the heatsink. ■ Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them.

  • Page 77: Cable Connections

    6.6.1 Cable Connections System board connectors are color-coded to make it easier to find the proper connection. Cable Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply Cable Front power button/LED Speaker Chassis fan Diskette drive Second ODD Audio cable Front I/O USB Serial port B...

  • Page 78: Memory

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.7 Memory Ä CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other. Static electricity can damage the electronic components of the computer or optional cards.

  • Page 79: Expansion Cards

    6.8 Expansion Cards 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3. On the rear of the computer, a sliding slot cover lock secures the expansion card brackets and expansion slot covers in place.
  • Page 80 Removal and Replacement Procedures— Microtower (MT) Chassis 4. Before installing an expansion card, remove the expansion slot cover or the existing expansion card. ✎ Before removing an installed expansion card, disconnect any cables that may be attached to the expansion card. a.
  • Page 81 c. If removing a PCI Express x16 card, pull the retention arm on the back of the expansion socket away from the card and carefully rock the card back and forth until the connectors pull free from the socket. Pull the expansion card straight up from the socket then away from the inside of the chassis to release it from the chassis frame.
  • Page 82 Removal and Replacement Procedures— Microtower (MT) Chassis 7. If replacing or adding a new expansion card, hold the card just above the expansion slot on the system board then move the card toward the rear of the chassis 1 so that the bracket on the card is aligned with the open slot on the rear of the chassis.

  • Page 83: Drives

    CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing the hard drive. Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the HP factory-installed files. 6.9.1 Drive Positions...

  • Page 84: Removing An External Drive

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.9.2 Removing an External Drive 1. Remove any removable media, such as a compact disc or diskette, from the drive. 2. Prepare the computer for disassembly 3. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 4.

  • Page 85: Disconnecting Diskette Drive Cables

    Disconnecting Diskette Drive Cables Releasing the Drives 6. A latch drive bracket with release tabs secures the drives in the drive bay. Lift the release tab on the latch drive bracket 1 for the drive you want to remove, then slide the drive from its drive bay 2.

  • Page 86: Installing An External Drive

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.9.3 Installing an External Drive CAUTION: To prevent loss of work and damage to the computer or drive: Ä ■ If you are inserting or removing a hard drive, shut down the operating system properly, then turn off the computer.

  • Page 87: Connecting Optical Drive Cables

    2. Slide the drive into the drive bay, making sure to align the guide sctrews with the guide slots, until the drive snaps into place. 3. Reconnect the power and data cables to the drive as shown in the following illustrations. ✎...

  • Page 88: Connecting Diskette Drive Cables

    Removal and Replacement Procedures— Microtower (MT) Chassis Connecting Diskette Drive Cables 4. Install the front bezel 5. Install the access panel 6. Turn on the computer. ✎ If you replaced the primary hard drive, the Restore Plus! CD may be used to restore the operating system, software drivers, and/or any software applications that were preinstalled on the computer.
  • Page 89 Removal and Replacement Procedures— Microtower (MT) Chassis 4. Remove the front bezel (Section 6.4). 5. Disconnect the power 1 and data 2 cables from the back of the drive. 6. Remove the power cable 1 and primary data cable 2 and secondary data cable (if necessary) 3 from the cable retainers to make it easier to access the drive.
  • Page 90 Removal and Replacement Procedures— Microtower (MT) Chassis 7. Release the drive by pulling the green release tab away from the drive 1 and sliding the drive out of the bay 2. 8. Remove the four guide screws (two on each side) from the old drive. You will need these screws to install a new drive.
  • Page 91 10. Slide the drive into the drive bay, making sure to align the guide scews with the guide slots, ubtil the drive snaps into place. The upper bay is for the primatry hard drive. The bottom bay is for the optional secondary hard drive. 11.
  • Page 92 Removal and Replacement Procedures— Microtower (MT) Chassis ✎ If your system only has one SATA hard drive, you must connect the hard drive cable to the dark blue connector labeled SATA0 to avoid any hard drive performance problems. If you are adding a second hard drive, connect the data cable to the next available (unpopulated) SATA connector in the system board in the following order: SATA0, SATA1, SATA3, SATA2.

  • Page 93: Chassis Fan

    6.10 Chassis Fan 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3. Disconnect the power cable that connects the chassis fan to the system board 1. 4.

  • Page 94: Front Shroud

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.1 1 Front Shroud 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3.

  • Page 95: Front I/O Panel Housing Assembly

    6.12 Front I/O Panel Housing Assembly 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3. Remove the hard drive cables from the plastic shroud at the front of the chassis and from the hard drives.

  • Page 96: Heatsink

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.13 Heatsink 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3.

  • Page 97: Processor

    6.14 Processor 1. Prepare the computer for disassembly 2. Remove the computer cover 3. Disconnect the heatsink control cable from the system board and remove the heatsink (Section 6.13). 4. Rotate the locking lever to its full open position 1. 5.
  • Page 98 After installing a new processor onto the system board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be http://h18000.www1.hp.com/support/files found on the Web at: 6–30...

  • Page 99: Speaker

    6.15 Speaker 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3. Remove the hard drive cables from the plastic shroud at the front of the chassis and from the hard drives.

  • Page 100: Power Supply

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.16 Power Supply Å WARNING: Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the computer and/or the AC outlet before opening the computer.

  • Page 101: System Board

    6.17 System Board 1. Prepare the computer for disassembly 2. Remove the access panel and rotate the computer so the system board is parallel to the table to make it easier to work on 3. Remove all PCI expansion cards 4.

  • Page 102: Battery

    In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP, their authorized partners, or their agents. CAUTION: Static electricity can damage the electronic components of the computer or optional Ä...

  • Page 103: 1Type 1 Battery Holder

    6.18.1 Type 1 Battery Holder 1. Lift the battery out of its holder. 2. Slide the replacement battery into position, positive side up. 3. The battery holder automatically secures the battery in the proper position. 4. Replace the computer access panel 5.

  • Page 104: 2Type 2 Battery Holder

    Removal and Replacement Procedures— Microtower (MT) Chassis 6.18.2 Type 2 Battery Holder 1. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out 1. 2.

  • Page 105: Type 3 Battery Holder

    6.18.3 Type 3 Battery Holder 1. Pull back on the clip 1 that holds the battery in place, then remove the battery 2. 2. Insert the new battery and position the clip back in place. 3. Replace the computer access panel 4.
  • Page 106 Removal and Replacement Procedures— Microtower (MT) Chassis 6–38 437963-001 Service Reference Guide, dc5750...

  • Page 107: Removal And Replacement Procedures-Small Form Factor (Sff) Chassis

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and replacement procedures, run the Diagnostics utility to verify that all components operate properly. ✎...

  • Page 108: External Security Devices

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis External Security Devices 7.2.1 Cable Lock The cable lock may be used to secure the access panel to the chassis and, at the same time, secure the computer to a fixed object. Insert the cable lock in the location shown below.

  • Page 109: Access Panel

    Access Panel 1. Prepare the computer for disassembly Ä CAUTION: Before removing the access panel, ensure that the computer is turned off and that the power cord is disconnected from the electrical outlet. 1. Push down on the button 1 to release the latch that secures the access panel to the computer chassis.

  • Page 110: Front Bezel

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis Front Bezel 1. Prepare the computer for disassembly 2. Remove the access panel 3. Press the green latch behind the upper right side of the bezel 1 and pull the right side of the bezel off the chassis 2, then the left side.

  • Page 111: Front Drive Bezels

    Front Drive Bezels 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the drive bezel by pushing the two retaining tabs that hold the bezel in place towards the outer left edge of the bezel 1 and pull the bezel blank inwards to remove it 2. ✎...

  • Page 112: Cable Management

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis Cable Management The Small Form Factor chassis is a very compact computer and proper routing of the internal cables is critical to the operation of the computer. Follow good cable management practices when working inside the computer.

  • Page 113: Cable Connections

    7.6.1 Cable Connections System board connectors are color-coded to make it easier to find the proper connection. Cable Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply Power Supply Cable Front LED/Power Speaker Chassis fan Diskette drive Front audio Front I/O USB Serial port B...

  • Page 114: Drives

    CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing the hard drive. Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the HP factory-installed files. 7.7.1 Drive Positions...

  • Page 115: Optical Drive

    7.7.2 Optical Drive CAUTION: All removable media should be taken out of the drives before removing the drive from the Ä computer. ✎ An optical drive is a CD-ROM, CD-R/RW, DVD-ROM, DVD+R/RW, or CD-RW/DVD Combo drive. 1. Prepare the computer for disassembly 2.
  • Page 116 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 6. Remove the two M3 metric guide screws in the lower holes on each side of th edrive. HP has provided four extra M3 metric guide screws on the front of the chassis, under the front bezel.
  • Page 117 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 8. Connect the power 1 cable and data 2 cables to the rear of the optical drive. 9. Complete the installation of the drive by reversing the remainder of the removal process. Service Reference Guide, dc5750 437963-001 7–1 1...

  • Page 118: External 3.5-Inch Drive

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7.7.3 External 3.5-inch Drive 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the front bezel 4. Remove the optical drive 5. .Disconnect the data 1 and power 2 cables from the drive. The other end of the cables should remain connected to the system board.
  • Page 119 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7. Tilt the left side of the drive down slightly 1 so that the top lip of the guide screws are not caught behind the metal frame, the pull the drive out of the drive bay 2. To replace the drive, reverse the removal procedure.

  • Page 120: Hard Drive

    Ä before removing the hard drive. Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the HP factory-installed files. Ä CAUTION: To prevent loss of work and damage to the computer or drive: ■...
  • Page 121 7. Press down on the lever to the left of the hard drive 1, slide the drive back until it stops, and lift it straight up 2. 8. Tilt the left side of the hard drive down slightly 1 so that the top lips of the guide screws are not caught behind the metal frame, then pull the drive out of the drive bay 2.
  • Page 122 When replacing the hard drive, transfer the four screws from the old drive to the new one. You will need a Torx -T15 screwdriver to remove and re-install the guide screws. HP has provided four extra 6-32 standard guide screws on the front of the chassis under the front bezel. The 6-32 standard guide screws are silver.

  • Page 123: Memory

    Memory Ä CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other. CAUTION: Static electricity can damage the electronic components of the computer or optional cards.
  • Page 124 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis ✎ A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket. 7. Push the module down into the socket, ensuring that the module is fully inserted and properly seated.

  • Page 125: Expansion Card

    Expansion Card 7.9.1 Expansion Card Retainer 1. Turn off the computer properly through the operating system, then turn off any external devices. 2. Disconnect the power cord from the power outlet and disconnect any external devices. 3. Remove the access panel 4.
  • Page 126 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 6. If you are removing an existing PCI card, hold the card at each end, andcarefully rock it back and forth until the connectors pull free from the socket. Pull the card straight up from the socket then back towards the inside of the chassis to release it from the chassis frame.

  • Page 127: Power Supply

    7.10 Power Supply Å WARNING: Voltage is always present on the system board when the computer is plugged into an active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should be disconnected from the computer and/or the AC outlet before opening the computer. 1.

  • Page 128: Fan Shroud

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7.1 1 Fan Shroud 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove all cables that are attached to the fan shroud 1. 4. Lift up on the fan shroud 2 to remove it from the computer. To replace the shroud, reverse the removal procedures.

  • Page 129: Front I/O Device

    7.12 Front I/O Device 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the fan shroud 4. Remove the optical drive 5. Rotate the optical drive retainer to its upright position to access the memory module sockets. 6.

  • Page 130: Chassis Fan

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7.13 Chassis Fan 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the fan shroud 4. Disconnect the chassis fan power cable from the system board. 5. Remove the four screws that secure the chassis fan to the front of the chassis 1 then, remove the fan 2.

  • Page 131: Power Switch Assembly

    7.14 Power Switch Assembly 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the fan shroud 4. Remove the optical drive 5. Rotate the optical drive retainer to its upright position. 6. Disconnect the power switch/LED cable from the system board. Service Reference Guide, dc5750 Removal and Replacement Procedures—...
  • Page 132 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7. Squeeze the switch holder retaining clips together at the front of the chassis 1 and push the switch assembly out of the chassis 2. Push the two LEDs out of the chassis 3. To install the power switch and LEDs, reverse the removal procedure.

  • Page 133: Speaker

    7.15 Speaker 1. Prepare the computer for disassembly 2. Remove the access 3. Remove the fan shroud 4. Disconnect the speaker wire from the system board. 5. Remove the two screws that secure the speaker to the chassis 1, then lift the speaker up and out of the chassis 2.

  • Page 134: Heatsink

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7.16 Heatsink 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove the fan shroud 4. Loosen the four captive screws 1 that secure the heatsink to the system board tray. CAUTION: Heatsink retaining screws should be removed in diagonally opposite pairs (as in an X) to Ä...

  • Page 135: Processor

    7.17 Processor 1. Prepare the computer for disassembly 2. Remove the access 3. Remove the fan shroud 4. Remove the heatsink 5. Raise the locking lever to its fully open position 1. 6. Carefully lift the processor from the socket 2. CAUTION: Do NOT handle the pins in the processor.
  • Page 136 After installing a new processor onto the system board, always update the system ROM to ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can be http:\\h18000.www1.hp.com/support/files found on the Web at: 7–30...

  • Page 137: System Board

    7.18 System Board 1. Prepare the computer for disassembly 2. Remove the access panel 3. Remove all PCI and PCI Express expansion boards 4. Remove the fan shroud from the chassis 5. Remove the optical drive 6. Rotate the optical drive retainer to its upright position. 7.

  • Page 138: Battery

    Batteries, battery packs, and accumulators should not be disposed of together with the general household waste. In order to forward them to recycling or proper disposal, please use the public collection system or return them to HP, their authorized partners, or their agents. Ä...

  • Page 139: 1Type 1 Battery Holder

    7.19.1 Type 1 Battery Holder 1. Lift the battery out of its holder. 2. Slide the replacement battery into position, positive side up. 3. The battery holder automatically secures the battery in the proper position. 4. Replace the computer access panel. 5.

  • Page 140: 2Type 2 Battery Holder

    Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7.19.2 Type 2 Battery Holder 1. To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the battery pops up, lift it out 2.

  • Page 141: Type 3 Battery Holder

    7.19.3 Type 3 Battery Holder 1. Pull back on the clip 1 that holds the battery in place, then remove the battery 2. 2. Insert the new battery and position the clip back in place. 3. Replace the computer access panel. 4.
  • Page 142 Removal and Replacement Procedures— Small Form Factor (SFF) Chassis 7–36 437963-001 Service Reference Guide, dc5750...

  • Page 143: Connector Pin Assignments

    This appendix contains the pin assignments for many computer and workstation connectors. Some of these connectors may not be used on the product being serviced. Keyboard Connector and Icon Mouse Connector and Icon Ethernet BNC Connector and Icon Service Reference Guide, dc5750 Connector Pin Assignments Signal Data...

  • Page 144: Parallel Interface

    Connector Pin Assignments Ethernet RJ-45 Connector and Icon Ethernet AUI Signal Ground Negative AUI Differential Collision Positive AUI Differential Collision Negative AUI Differential Transmit Positive AUI Differential Transmit Ground Ground Negative AUI Differential Receive Parallel Interface Signal Strobe Data Bit 0 Data Bit 1 Data Bit 2 Data Bit 3...

  • Page 145: Line-In Audio

    Serial Interface, Powered and Non-Powered Connector and Icon Connector and Icon Microphone Connector and Icon (1/8” miniphone) 1 2 3 1 2 3 Headphone Connector and Icon (1/8” miniphone) 1 2 3 Line-In Audio Connector and Icon (1/8” miniphone) 1 2 3 Service Reference Guide, dc5750 Signal Carrier Detect (12V if powered)

  • Page 146: External Infrared Transceiver

    Connector Pin Assignments Line-Out Audio Connector and Icon (1/8” miniphone) 1 2 3 External Infrared Transceiver Signal Transmit Receive Ground Monitor Signal Red Analog Green Analog Blue Analog Not used Ground A–4 Signal 1 (Tip) Audio_Out_Left 2 (Ring) Audio_Out_Right 3 (Shield) Ground Connector and Icon Signal...
  • Page 147 ATA/ATAPI (IDE) Standard Drive Cable Signal Reset Ground DD10 DD1 1 DD12 DD13 24-Pin Power (CMT and MT models) Signal +3.3 V +3.3 V +5 V +5 V Service Reference Guide, dc5750 Connector Signal DD14 DD15 Ground (Key) DMARQ Ground DIOW Ground DIOR...
  • Page 148 Connector Pin Assignments 24-Pin MicroFit Power (USDT, SFF, and ST models) Signal +5 Vaux +5 V +5 V PS_ON 4-Pin Power (for CPU) (MT and CMT models) Connector and Icon 6-Pin Power (for CPU) (USDT, SFF, and ST models) Connector and Icon A–6 Connector Signal...

  • Page 149: Drive Connector

    SATA Data and Power Signal Ground V 3.3 Ground V 12 *S = Data, P = Power Service Reference Guide, dc5750 Drive Connector Signal Signal Ground V 3.3 V 3.3 Ground Ground P1 1 Reserved V 12 V 12 437963-001 Connector Pin Assignments Signal Ground...

  • Page 150: Pin Signal Pin

    Connector Pin Assignments PCI Express x1, x4, x8, and x16 PCI Express Connector Pin A Signal Signal PRSNT1# JTAG3 +12V JTAG4 +12V JTAG5 +3.3v JTAG2 +3.3v PERn(2) RSVD RSVD PERp3 PERn3 PERp4 PERp9 PERp8 PERn9 PERn8 PERp10 PERp14 PERn15 PERn14 PERp15 Pin B information is on the next page Notes:...
  • Page 151 PCI Express x1, x4, x8, and x16 PCI Express Connector Pin B Signal Signal +12V SMDAT +12V RSVD +3.3v JTAG1 SMCLK 3.3vAux PRSNT2# PETp3 PETn3 PETp4 PETn4 RSVD PETn8 PETp10 PETp9 PETn10 PETn9 PRSNT2# RSVD PETp15 PETn15 Notes: x1 PCI Express uses pins 1- 1 8 x4 PCI Express uses pins 1-32 x8 PCI Express uses pins 1-49 x16 PCI Express uses pins 1-82...

  • Page 152: Dvi Connector

    Connector Pin Assignments DVI Connector Signal T.M.D.S. Data2- T.M.D.S. Data2+ T.M.D.S. Data2/4 Shield T.M.D.S. Data4- T.M.D.S. Data4+ DDC Clock DDC Data No Connect T.M.D.S. Data1- T.M.D.S. Data1+ T.M.D.S. Data1/3 Shield T.M.D.S. Data3- A–10 Connector and Icon Signal T.M.D.S. Data3+ +5V Power Ground (for +5V) Hot Plug Detect T.M.D.S.

  • Page 153: General Requirements

    The power supplies on some computers have external power switches. The voltage select switch feature on the computer permits it to operate from any line voltage between 100-120 or 220-240 volts AC. Power supplies on those computers that do not have external power switches are equipped with internal switches that sense the incoming voltage and automatically switch to the proper voltage.

  • Page 154: Country-Specific Requirements

    Power Cord Set Requirements Country-Specific Requirements Additional requirements specific to a country are shown in parentheses and explained below. Country Australia (1) Austria (1) Belgium (1) Canada (2) Denmark (1) Finland (1) France (1) Germany (1) 1. The flexible cord must be <HAR> Type HO5VV-F, 3-conductor, 0.75mm Power cord set fittings (appliance coupler and wall plug) must bear the certification mark of the agency responsible for evaluation in the country where it will be used.

  • Page 155: Post Error Messages

    POST Error Messages An error message results if the Power-On Self-Test (POST) encounters a problem. This test runs when the system is turned on, checking assemblies within the computer and reporting any errors found. Not all computers use all of the codes listed. POST Error Messages Screen Message 101-Option ROM...

  • Page 156: Onboard Devices

    Windows utilities. 2. Make sure memory module(s) are installed properly. 3. If third party memory has been added, test using HP-only memory. 4. Verify proper memory module type. RAM failure. 1. Run Computer Setup (F10 Setup) or Windows utilities.
  • Page 157 POST Error Messages (Continued) Screen Message 219-ECC Memory Module Detected. ECC Modules not supported on this platform 301-Keyboard Error 303-Keyboard Controller Error 304-Keyboard or System Unit Error 404-Parallel Port Address Conflict Detected 410-Audio Interrupt Conflict 41 1-Network Interface Card Interrupt Conflict 501-Display Adapter Failure 510-Flash Screen image...
  • Page 158 POST Error Messages POST Error Messages (Continued) Screen Message 51 1-CPU, CPUA, or CPUB Fan not detected 512-Chassis, rear chassis, or front chassis fan not detected 514-CPU or Chassis Fan not detected. 601-Diskette Controller Error 605-Diskette Drive Type Error 610-External Storage Device Failure 61 1-Primary Floppy Port Address Assignment...
  • Page 159 POST Error Messages (Continued) Screen Message 918-Front USB Not Connected 921-Device in PCI Express slot failed to initialize. 1 151-Serial Port A Address Conflict Detected 1 152-Serial Port B Address Conflict Detected 1 155-Serial Port Address Conflict Detected 1201-System Audio Address Conflict Detected 1202-MIDI Port Address...
  • Page 160 Protection System test under error message.) Storage > DPS Self-test. 2. Apply firmware patch if applicable (available at www.hp.com/support). 3. Back up contents and replace hard drive. One or more SATA Ensure SATA connectors are used in devices are improperly ascending order.
  • Page 161 POST Error Messages (Continued) Screen Message Network Server Mode Active and No Keyboard Attached Parity Check 2 System will not boot without fan. Service Reference Guide, dc5750 Probable Cause Keyboard failure while 1. Reconnect keyboard with computer Network Server Mode turned off.

  • Page 162: Post Diagnostic Front Panel Leds And Audible Codes

    POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them. WARNING: When the computer is plugged into an AC power source, voltage is always applied to the Å...
  • Page 163 DIMM module. 1. Reseat DIMMs. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. 437963-001 POST Error Messages...
  • Page 164 POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Red Power LED flashes six times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.
  • Page 165 POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Red Power LED flashes nine times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Red Power LED flashes ten times, once every second, followed...
  • Page 166 POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps System does not None power on and LEDs are not flashing. C–12 Possible Cause Recommended Action System unable to Press and hold the power button for less power on.

  • Page 167: Preliminary Checklist

    Troubleshooting Without Diagnostics Preliminary Checklist This section describes some simple, preliminary tests and guidelines for troubleshooting the computer without using the diagnostics. ■ Are the computer and monitor connected to a working electrical outlet? ■ Is the voltage select switch is set to the appropriate voltage for your region (115V or 230V)? ■...

  • Page 168: Solving Minor Problems

    Troubleshooting Without Diagnostics Solving Minor Problems Solving Minor Problems Problem Computer appears locked up and will not turn off when the power button is pressed. Computer will not respond to USB keyboard or mouse. Computer date and time display is incorrect. Computer appears to pause periodically.
  • Page 169 Solving Minor Problems (Continued) Problem Poor performance is experienced. Service Reference Guide, dc5750 Cause Possible Solution Processor is hot. 1. Ensure airflow to the computer is not blocked. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit the required airflow.
  • Page 170 Troubleshooting Without Diagnostics Solving Minor Problems (Continued) Problem Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved.

  • Page 171: Solving Power Supply Problems

    Solving Power Supply Problems Solving Power Supply Problems Problem Power supply shuts down intermittently. Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. Beeps continue for five iterations after which the LED flashes will continue until the...
  • Page 172 Troubleshooting Without Diagnostics Solving Power Supply Problems (Continued) Problem Power LED flashes Red, four times, once every second, followed by a two second pause, and the computer beeps four times. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved.

  • Page 173: Solving Diskette Problems

    Solving Diskette Problems Solving Diskette Problems Problem Diskette drive light stays on. Drive not found. Diskette drive cannot write to a diskette. Cannot format diskette. Service Reference Guide, dc5750 Cause Solution Diskette is damaged. In Microsoft Windows XP, right-click Start, click Explore, and select a drive.
  • Page 174 Troubleshooting Without Diagnostics Solving Diskette Problems (Continued) Problem Cannot format diskette. (continued) A problem has occurred with a disk transaction. Diskette drive cannot read a diskette. “Invalid system disk” message is displayed. Cannot Boot to Diskette. D–8 Cause Solution Legacy diskette writes Enter Computer Setup and enable are disabled in Legacy Diskette Write in...

  • Page 175: Solving Hard Drive Problems

    Solving Hard Drive Problems Solving Hard Drive Problems Problem Hard drive error occurs. Disk transaction problem. Drive not found (identified). Nonsystem disk/NTLDR missing message Service Reference Guide, dc5750 Cause Solution Hard disk has bad Use a utility to locate and block sectors or has failed.
  • Page 176 Troubleshooting Without Diagnostics Solving Hard Drive Problems (Continued) Problem Nonsystem disk/NTLDR missing message (continued) Computer will not boot from hard drive. D–10 Cause Solution System is trying to start 1. Insert a bootable diskette into from the hard drive, but the diskette drive and restart the the hard drive may have computer.

  • Page 177: Solving Media Card Reader Problems

    Solving Hard Drive Problems (Continued) Problem Computer will not boot from hard drive. (continued) Computer seems to be locked up. Solving Media Card Reader Problems Solving Media Card Reader Problems Problem Media card will not work in a digital camera after formatting it in Microsoft Windows XP.
  • Page 178 PCI media card reader to an available card, which is not USB connector on the computer’s supported on the HP system board. If no connector is Desktop BIOS. available, plug the bootable device into a different USB port on the computer.

  • Page 179: Solving Display Problems

    Solving Display Problems Solving Display Problems Problem Blank screen (no video). Service Reference Guide, dc5750 Cause Solution Monitor is not turned on Turn on the monitor and check that and monitor light is not the monitor light is on. Bad monitor. Try a different monitor.
  • Page 180 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Pre-video graphics For systems with a graphics card: error.
  • Page 181 Solving Display Problems (Continued) Problem Blank screen and the power LED flashes Red seven times, once every second, followed by a two second pause, and the computer beeps seven times. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved.
  • Page 182 SoftPaq that will assist you with the synchronization, go to the following Web site, select the appropriate monitor, and download either SP32347 or SP32202: http://www.hp.com/support Graphics card is not 1. Reseat the graphics card. seated properly or is 2. Replace the graphics card. bad.

  • Page 183: Solving Audio Problems

    Solving Display Problems (Continued) Problem Certain typed symbols do not appear correct. Solving Audio Problems Solving Audio Problems Problem Sound cuts in and out. Sound does not come out of the speaker or headphones. Service Reference Guide, dc5750 Cause Solution The font you are using Use the Character Map to locate the does not support that...
  • Page 184 Troubleshooting Without Diagnostics Solving Audio Problems (Continued) Problem Sound does not come out of the speaker or headphones. (continued) D–18 Cause Solution Audio device may be Ensure that the device is connected connected to the wrong to the correct jack on the rear of the jack on the rear of the computer.

  • Page 185: Solving Printer Problems

    Solving Audio Problems (Continued) Problem Sound does not come out of the speaker or headphones. (continued) Sound from headphones is not clear or muffled. Computer appears to be locked up while recording audio. Line-in, Line-out, headphone, or microphone jacks are not functioning properly.

  • Page 186: Solving Keyboard And Mouse Problems

    Troubleshooting Without Diagnostics Solving Printer Problems (Continued) Problem Printer will not turn on. Printer prints garbled information. Printer is offline. Solving Keyboard and Mouse Problems Solving Keyboard and Mouse Problems Problem Keyboard commands and typing are not recognized by the computer. D–20 Cause Solution...
  • Page 187 Solving Keyboard and Mouse Problems (Continued) Problem Cursor will not move using the arrow keys on the keypad. Mouse does not respond to movement or is too slow. Service Reference Guide, dc5750 Cause Solution Computer is in Press the power button to resume standby mode.
  • Page 188 Troubleshooting Without Diagnostics Solving Keyboard and Mouse Problems (Continued) Problem Mouse will only move vertically or horizontally, or movement is jerky. D–22 Cause Solution Computer is in Press the power button to resume standby mode. from standby mode. When attempting to resume Ä...

  • Page 189: Solving Hardware Installation Problems

    Solving Hardware Installation Problems You may need to reconfigure the computer when you add or remove hardware, such as an additional diskette drive. If you install a plug and play device, Windows XP automatically recognizes the device and configures the computer. If you install a non–plug and play device, you must reconfigure the computer after completing installation of the new hardware.
  • Page 190 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Graphics card is not For systems with a graphics card: seated properly or is 1.

  • Page 191: Solving Network Problems

    Solving Network Problems These guidelines do not discuss the process of debugging the network cabling. Solving Network Problems Problem Wake-on-LAN feature is not functioning. Network driver does not detect network controller. Network status link light never flashes. ✎ The network status light should flash when there is network activity.
  • Page 192 Troubleshooting Without Diagnostics Solving Network Problems (Continued) Problem Diagnostics reports a failure. Diagnostics passes, but the computer does not communicate with the network. Network controller stopped working when an expansion board was added to the computer. Network controller stops working without apparent cause.
  • Page 193 Solving Network Problems (Continued) Problem Network controller stops working without apparent cause. (continued) New network card will not boot. Cannot connect to network server when attempting Remote System Installation. System setup utility reports unprogrammed EEPROM. Service Reference Guide, dc5750 Cause Solution The network controller is Replace the system board.

  • Page 194: Solving Memory Problems

    DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the system will not boot the operating system.

  • Page 195: Solving Processor Problems

    Solving Processor Problems Solving Processor Problems Problem Poor performance is experienced. Power LED flashes Red three times, once every second, followed by a two second pause, and the computer beeps three times. Beeps continue for five iterations after which the LED flashes will continue until the problem is resolved.

  • Page 196: Solving Cd-Rom And Dvd Problems

    Troubleshooting Without Diagnostics Solving CD-ROM and DVD Problems Solving CD-ROM and DVD Problems Problem System will not boot from CD-ROM or DVD drive. Drive not found (identified). CD-ROM or DVD devices are not detected or driver is not loaded. D–30 Cause Solution The device is attached...
  • Page 197 Solving CD-ROM and DVD Problems (Continued) Problem Movie will not play in the DVD drive. Cannot eject compact disc (tray-load unit). CD-ROM, CD-RW, DVD-ROM, or DVD-R/RW drive cannot read a disc or takes too long to start. Recording audio CDs is difficult or impossible.

  • Page 198: Solving Drive Key Problems

    Troubleshooting Without Diagnostics Solving Drive Key Problems Solving Drive Key Problems Problem Drive Key is not seen as a drive letter in Windows XP. USB Drive Key not found (identified). System will not boot from USB Drive Key. The computer boots to DOS after making a bootable Drive Key.

  • Page 199: Solving Front Panel Component Problems

    Solving Front Panel Component Problems Solving Front Panel Component Problems Problem A USB device, headphone, or microphone is not recognized by the computer. Service Reference Guide, dc5750 Cause Solution It is not properly 1. Turn off the computer. connected. 2. Reconnect the device to the front of the computer and restart the computer.

  • Page 200: Solving Internet Access Problems

    Troubleshooting Without Diagnostics Solving Internet Access Problems Solving Internet Access Problems Problem Unable to connect to the Internet. Cannot automatically launch Internet programs. D–34 Cause Solution Internet Service Provider Verify Internet settings or contact the (ISP) account is not set ISP for assistance.
  • Page 201 Solving Internet Access Problems (Continued) Problem Internet takes too long to download Web sites. Service Reference Guide, dc5750 Cause Solution Modem is not set up Verify that the correct modem speed properly. and COM port are selected. For Windows XP 1.

  • Page 202: Solving Software Problems

    If you have installed an operating system other than the factory-installed operating system, check to be sure it is supported on the system. Solving Software Problems Problem Computer will not continue and no HP logo screen has appeared. Computer will not continue after HP logo screen has appeared.
  • Page 203 System Board and Riser Board Reference These reference designators are used on most but not all HP system and riser boards. Designator CR35 E49/JP49 J1 1 J20 - 29 J31 - J35 Service Reference Guide, dc5750 Component Battery socket/Battery LED - 5V_Aux (on)
  • Page 204 System Board and Riser Board Reference Designators Designator Component (Continued) Stacked mouse (Top)/keyboard (Bottom) connector Video connector, VGA Primary single USB connector Secondary single USB port Microphone jack Line-in jack Line-out jack Headphone jack Volume control Double-stacked headphone (Bottom)/microphone (Top) connector Double-stacked line-in (Top)/line-out (Bottom) connector Stacked serial/audio connector Primary double-stack USB, Top = Port 2, Bottom = Port 1...
  • Page 205 Designator Component (Continued) Header for front panel audio Header for front panel USB Internal USB connector 1 Internal USB connector 2 MultiBay header SCSI LED connector PCI extender slot (female) Blade PC graphics connector (outboard) Blade PC graphics connector (inboard) Second serial port Primary serial port Double stack serial port, Top = Serial B, Bottom = Serial A...
  • Page 206 System Board and Riser Board Reference Designators Designator Component (Continued) Clock chip 64 bit Bridge LOM1 U1 1 LOM1 EEPROM LOM1 PHY Audio Codec Audio amplifier LOM2 LOM2 EEPROM LOM2 PHY SPI ROM - SOIC-8 footprint Fan controller SPI ROM - SO16 footprint TMDS controller Parallel port diode array First serial port transceiver...

  • Page 207: Dimm Sockets

    The dc5750 series computers with AMD-based processors come with double data rate 2 synchronous dynamic random access memory (DDR2-SDRAM) dual inline memory modules (DIMMs). Ä CAUTION: DDR and DDR2 memory modules are not interchangeable. DDR2-SDRAM DIMMs The memory sockets on the system board can be populated with up to four industry-standard DIMMs.
  • Page 208 Memory The system board shown may differ from the one in your product. Item The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are installed. ■ The system will operate in single channel mode if the DIMM sockets are populated in one channel only.
  • Page 209 4-pin power pin assignments A–6 24-pin MicroFit power pin assignments A–6 24-pin power pin assignments A–5 6-pin power pin assignments A–6 access panel MT removal and replacement 6–4 access panel, SFF removal and replacement 7–3 adding devices 1–1 Altiris, Deployment Solution Agent 3–2 asset tracking 3–15 ATA/ATAPI (IDE) drive cable pin assignments A–5...
  • Page 210 Index date and time display problems D–2 DDR2 memory F–1 deleting password 3–20 delimiter characters, table 3–21 device drivers, installing 1–1 diagnostic tool for hard drives 3–25 diagnostics utility 2–14 2–18 DIMMs F–1 disassembly preparation MT 5–1 6–1 SFF 7–1 diskette drive MT removal and replacement 6–16 SFF removal and replacement 7–12...
  • Page 211 3–7 headphone pin assignments A–3 heatsink MT removal and replacement 6–28 SFF removal and replacement 7–28 HP Backup and Recovery Manager 1–2 HP Client Foundation Suite 3–5 HP Client Manager 3–4 HP Client Premium Suite 3–5 HP Insight Diagnostics 2–14 2–18...
  • Page 212 Index optical drive MT removal and replacement 6–16 SFF removal and replacement 7–9 overheating, prevention 5–5 padlock MT removal and replacement 6–3 SFF 7–2 parallel interface pin assignments A–2 partition, hard drive 4–3 password changing 3–20 clearing 3–21 deleting 3–20 options 2–8 power-on 2–8 3–19...
  • Page 213 5–8 SDRAM (synchronous dynamic random access memory) F–1 security DriveLock 3–21 fingerprint identification technology 3–25 Service Reference Guide, dc5750 HP ProtectTools Security Manager 3–5 MT external 6–2 6–3 password 3–18 SFF external 7–2 security features overview 3–16 serial interface pin assignments A–3...
  • Page 214 Boot Block Emergency Recovery Mode 3–9 Computer Setup Utilities 2–1 Drive Protection System 3–25 Fault Notification and Recovery 3–25 HP Backup and Recovery Manager 1–2 HP Client Foundation Suite 3–5 HP Client Manger 3–4 HP Client Premium Suite 3–5 HP Insight Diagnostics 2–14 HP OpenView Client Configuration Manager 3–6...

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