Lenovo ThinkCentre M90q Hardware Maintenance Manual
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Lenovo ThinkCentre M90q Hardware Maintenance Manual

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  • Page 1 M90q Hardware Maintenance Manual...
  • Page 2 First Edition (June 2020) © Copyright Lenovo 2020. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-...

  • Page 3: Table Of Contents

    Diagnostics ....Handling electrostatic discharge-sensitive Lenovo diagnostic tools ..devices ....4 UEFI diagnostic program .
  • Page 4 Chapter 7. Notices and Heat sink ....trademarks ....89 Microprocessor ... . . System board .

  • Page 5: About This Manual

    Important: This manual is intended only for trained service technicians who are familiar with ThinkCentre computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkCentre computer, be sure to read and understand Chapter 1 “Important safety information” on page 1. © Copyright Lenovo 2020...
  • Page 6 M90q Hardware Maintenance Manual...

  • Page 7: Chapter 1. Important Safety Information

    Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool. © Copyright Lenovo 2020...

  • Page 8: Electrical Safety

    Electrical safety CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

  • Page 9: Safety Inspection Guide

    • Do not service the following parts with the power on when they are removed from their normal operating places in a machine: – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) •...

  • Page 10: Handling Electrostatic Discharge-Sensitive Devices

    8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with. Handling electrostatic discharge-sensitive devices Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.
  • Page 11 • Italian • Korean • Spanish DANGER Electrical current from power, telephone and communication cables is hazardous. To avoid a shock hazard: • Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm. •...
  • Page 12 CAUTION: When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are installed, note the following: • Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device. •...
  • Page 13 Chapter 1 Important safety information...
  • Page 14 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) M90q Hardware Maintenance Manual...
  • Page 15 PERIGO A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa. Para evitar risco de choque elétrico: • Não conecte nem desconecte nenhum cabo ou execute instalação, manutenção ou reconfiguração deste produto durante uma tempestade com raios. •...
  • Page 16 Quando produtos a laser (como unidades de CD-ROMs, unidades de DVD-ROM, dispositivos de fibra ótica ou transmissores) estiverem instalados, observe o seguinte: • Não remova as tampas. A remoção das tampas de um produto a laser pode resultar em exposição prejudicial à...
  • Page 17 Chapter 1 Important safety information...
  • Page 18 M90q Hardware Maintenance Manual...
  • Page 19 Chapter 1 Important safety information...
  • Page 20 DANGER Le courant électrique provenant de l'alimentation, du téléphone et des câbles de transmission peut présenter un danger. Pour éviter tout risque de choc électrique : • Ne manipulez aucun câble et n'effectuez aucune opération d'installation, d'entretien ou de reconfiguration de ce produit au cours d'un orage.
  • Page 21 Connexion Déconnexion 1. Mettez les unités HORS TENSION. 1. Mettez les unités HORS TENSION. 2. Commencez par brancher tous les cordons sur les 2. Débranchez les cordons d'alimentation des prises. unités. 3. Débranchez les câbles d'interface des connecteurs. 3. Branchez les câbles d'interface sur des 4.
  • Page 22 ≥18 kg (37 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb) ATTENTION: Soulevez la machine avec précaution. ATTENTION: L'interrupteur de contrôle d'alimentation de l'unité et l'interrupteur dubloc d'alimentation ne coupent pas le courant électrique alimentantl'unité. En outre, le système peut être équipé de plusieurs cordonsd'alimentation.
  • Page 23 • Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken und Modems ist vor dem Öffnen des Gehäuses zu unterbrechen, sofern in den Installations- und Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind. • Zum Installieren, Transportieren und Öffnen der Abdeckungen des Computers oder der angeschlossenen Einheiten die Kabel gemäß...
  • Page 24 Laserstrahlung bei geöffneter Verkleidung. Nicht in den Strahl blicken. Keine Lupen oder Spiegel verwenden. Strahlungsbereich meiden. ≥18 kg ≥32 kg ≥55 kg ACHTUNG: Arbeitsschutzrichtlinien beim Anheben der Maschine beachten. ACHTUNG: Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit nicht unterbrochen.
  • Page 25 Chapter 1 Important safety information...
  • Page 26 PERICOLO La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere pericolosa. Per evitare il rischio di scosse elettriche: M90q Hardware Maintenance Manual...
  • Page 27 • Non collegare o scollegare qualsiasi cavo oppure effettuare l'installazione, la manutenzione o la riconfigurazione del prodotto durante un temporale. • Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a terra. • Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per questo prodotto.
  • Page 28 • Non rimuovere gli sportelli. L'apertura di un'unità laser può determinare l'esposizione a radiazioni laser pericolose. All'interno dell'unità non vi sono parti su cui effettuare l'assistenza tecnica. • L'utilizzo di controlli, regolazioni o l'esecuzione di procedure non descritti nel presente manuale possono provocare l'esposizione a radiazioni pericolose.
  • Page 29 Chapter 1 Important safety information...
  • Page 30 PELIGRO La corriente eléctrica procedente de cables de alimentación, teléfonos y cables de comunicación puede ser peligrosa. Para evitar el riesgo de descarga eléctrica: • No conecte ni desconecte los cables ni realice ninguna tarea de instalación, mantenimiento o reconfiguración de este producto durante una tormenta eléctrica. •...
  • Page 31 • No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales. • Desconecte los cables de alimentación, los sistemas de telecomunicaciones, las redes y los módems conectados antes de abrir las cubiertas de los dispositivos, a menos que se indique lo contrario en los procedimientos de instalación y configuración.
  • Page 32 Algunos productos láser tienen incorporado un diodo láser de clase 3A o clase 3B. Tenga en cuenta lo siguiente: Cuando se abre, queda expuesto a radiación láser. No mire directamente al rayo láser, ni siquiera con instrumentos ópticos, y evite exponerse directamente al rayo láser. ≥18 kg ≥32 kg ≥55 kg...

  • Page 33: Chapter 2. Important Service Information

    Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code might also cause false error © Copyright Lenovo 2020...

  • Page 34: Strategy For Replacing Frus For Cto, Special-Bid, And Standard Models

    Dynamic Configure To Order (CTO) model This model provides the ability for a customer to configure a Lenovo solution from a Web site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.

  • Page 35: Chapter 3. Product Overview

    Chapter 3. Product overview Front 1. ThinkCentre LED 2. Power button ™ 3. Storage drive activity indicator 4. USB-C (3.2 Gen 1) connector 5. Always On USB 3.2 connector Gen 2 6. Headset connector © Copyright Lenovo 2020...

  • Page 36: Rear

    Rear 1. Optional connectors* 2. Security-lock slot ® 3. Wi-Fi antenna slot* 4. Ethernet connector 5. USB 3.2 connectors Gen 2 6. USB 3.2 connector Gen 1 (with smart power-on) ™ 7. HDMI 1.4 out connector 8. USB 3.2 connector Gen 1 ®...

  • Page 37: Chapter 4. Service Checkout And Symptom-To-Fru Index

    • Machine type and model • Processor or hard disk drive upgrades • Failure symptom – Do diagnostics indicate a failure? – What, when, where, single, or multiple systems? – Is the failure repeatable? – Has this configuration ever worked? © Copyright Lenovo 2020...

  • Page 38: Symptom-To-Fru Index

    – If it has been working, what changes were made prior to its failing? – Is this the original reported failure? • Diagnostics version – Type and version level • Hardware configuration – Print (print screen) configuration currently in use –...

  • Page 39: Power Supply Problems

    Error FRU/Action The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following: 1. Attempt to back up the data on the failing hard disk drive. 2. Using the operating system programs, format the hard disk drive.

  • Page 40: Post Error Codes

    POST error codes Each time you turn on the system, it performs a series of tests that check the operation of the system and some options. This series of tests are called the Power-On Self-Test, or POST. POST checks the following operations: •...

  • Page 41: Miscellaneous Error Conditions

    8998 Not enough shadow RAM resources This error message is displayed for OPTION ROM, not all devices when the shadow RAM resources initialized. Suggest to remove some for option ROM are insufficient. add-on cards, or change to UEFI If the legacy option ROM is mode in BIOS setup.
  • Page 42 Message/Symptom FRU/Action Incorrect memory size during POST 1. Run the Memory tests. 2. Memory Module 3. System Board "Insert a Diskette" icon appears with a known-good 1. System Board diagnostics diskette in the first 3.5-inch diskette drive. 2. Diskette Drive Cable 3.

  • Page 43: Undetermined Problems

    Message/Symptom FRU/Action Serial or parallel connector device failure (adapter 1. External Device Self-Test OK? connector) 2. External Device 3. Cable 4. Alternate Adapter 5. System Board Some or all keys on the keyboard do not work 1. Keyboard 2. Keyboard Cable 3.
  • Page 44 M90q Hardware Maintenance Manual...

  • Page 45: Chapter 5. Troubleshooting, Diagnostics, And Recovery

    4. Run the diagnostic program. See “Diagnostics” on page 47. 5. Recover your operating system. See “Recovery” on page 48. 6. If the problem persists, contact Lenovo. Troubleshooting Use the troubleshooting information to find solutions to problems that have definite symptoms.

  • Page 46: Startup Problems

    Startup problems Problem Solution • Ensure that the power cord is correctly connected to the rear of the computer and to a working electrical outlet. • If the computer has a secondary power switch on the rear of the The computer does not start up when you computer, ensure that it is switched on.

  • Page 47: Audio Problems

    Audio problems Problem Solution • If you are using powered external speakers that have an On/Off control, ensure that: – The On/Off control is set to the On position. – The speaker power cable is connected to a properly grounded, functional ac electrical outlet.
  • Page 48 Problem Solution • Connect the cable from the Ethernet connector to the RJ45 connector of the hub. • Enable the Ethernet LAN feature in UEFI BIOS. • Enable the Ethernet LAN adapter. 1. Go to Control Panel and view by large icons or small icons. 2.
  • Page 49 Problem Solution • Enable the Bluetooth feature in UEFI BIOS. • Enable all Bluetooth devices. 1. Right-click the Start button to open the Start context menu. 2. Click Device Manager. Type the administrator password or provide confirmation if prompted. 3. Expand Bluetooth to display all Bluetooth devices. Right-click each Bluetooth device, and then click Enable device.

  • Page 50: Performance Problems

    Performance problems Problem Solution Note: Depending on the volume of the storage drives and amount of data stored on the storage drives, the disk-defragmentation process might take up to several hours. 1. Close any open programs and windows. 2. Open the Start menu. Excessive fragmented files exist on the 3.

  • Page 51: Storage Drive Problems

    Storage drive problems Problem Solution • Ensure that the signal cables and power cables for all the storage drives are connected correctly. • Ensure that the computer is configured correctly to support the storage drives. Some or all storage drives are missing from –...

  • Page 52: Serial Connector Problems

    Problem Solution • Disable any background programs, such as AntiVirus or Desktop The playback is slow or choppy. Themes. • Ensure that video resolution is less than 1152 x 864 pixels. • Ensure that the disc is in the drive with the shiny side of the disc facing down.

  • Page 53: Software Problems

    Use diagnostic solutions to test hardware components and report operating-system-controlled settings that interfere with the correct operation of your computer. Lenovo diagnostic tools For information about Lenovo diagnostic tools, go to: https://pcsupport.lenovo.com/lenovodiagnosticsolutions UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

  • Page 54: Recovery

    Table 1. Options on the main screen of the UEFI diagnostic program DIAGNOSTICS TOOLS • CPU [U] • SYSTEM INFORMATION [F1] • DISPLAY [D] • BAD BLOCK RECOVERY [F3] • KEYBOARD [K] • SMART INFORMATION [F5] • MEMORY [E] • MOTHERBOARD [H] •...

  • Page 55: Windows Automatic Recovery

    Windows recovery programs are damaged. If you did not create a recovery USB drive as a precautionary measure, you can contact Lenovo Customer Support Center and purchase one from Lenovo. For a list of the Lenovo Support phone numbers for your country or region, go to: https://pcsupport.lenovo.com/supportphonelist Create a recovery USB drive Attention: The creation process deletes anything stored on the USB drive.
  • Page 56 • From Lenovo Vantage: Open Lenovo Vantage to check the available update packages. If the latest UEFI BIOS update package is available, follow the on-screen instructions to download and install the package. • From the Lenovo Support Web site: Go to and select the entry for your computer.

  • Page 57: Chapter 6. Hardware Removal And Installation

    Common tool Isolated tweezers Common tool Hexagonal socket Common tool Silicone grease Consumable tool Polyamide tape Consumable tool Mylar tape Consumable tool Eraser Consumable tool Electrical tape Consumable tool Double-sided tape Consumable tool Conductive tape Consumable tool © Copyright Lenovo 2020...

  • Page 58: Major Frus And Crus

    Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air gaps. The hexagonal socket is used to pick up the antenna connectors. Major FRUs and CRUs Your computer contains the following types of CRUs and FRUs: •...
  • Page 59 Mouse* ® VESA mount bracket* External optical drive box* External optical drive* * for selected models For detailed FRU and CRU information, such as the FRU part numbers and supported computer models, go http://www.lenovo.com/serviceparts-lookup Chapter 6 Hardware removal and installation...
  • Page 60 M90q Hardware Maintenance Manual...

  • Page 61: System Board

    System board Clear CMOS (Complementary Metal Oxide M.2 Wi-Fi card slot Semiconductor)/Recovery jumper Microprocessor socket Coin-cell battery socket System fan connector Internal speaker connector Chapter 6 Hardware removal and installation...

  • Page 62: Removing And Installing Hardware

    Cover presence switch connector (intrusion switch SATA connector for hard disk drive connector) PCIe x8 card slot Serial connector (COM1) M.2 solid-state drive slot (SSD1) M.2 solid-state drive slot (SSD2) Memory slot (DIMM2) Memory slot (DIMM1) Removing and installing hardware This section provides instructions on how to remove and install hardware for your computer.
  • Page 63 3. Remove the power adapter. 4. Remove the power cord. 5. Install the power cord. Chapter 6 Hardware removal and installation...

  • Page 64: Vertical Stand

    6. Install the power adapter. 7. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Vertical stand Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
  • Page 65 3. Remove the vertical stand. 4. Install the vertical stand. 5. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Chapter 6 Hardware removal and installation...

  • Page 66: Vesa Mount Bracket

    VESA mount bracket Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Replacement procedure 1. Turn off the computer and remove all connected devices. 2. Disconnect the computer from ac power and all connected cables. 3.
  • Page 67 Replacement procedure 1. Turn off the computer and remove all connected devices. 2. Disconnect the computer from ac power and all connected cables. 3. Remove the external optical drive box. 4. Remove the external optical drive. Chapter 6 Hardware removal and installation...

  • Page 68: Power Adapter Bracket

    5. Install the external optical drive. 6. Install the external optical drive box. 7. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Power adapter bracket Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
  • Page 69 Replacement procedure 1. Turn off the computer and remove all connected devices. 2. Disconnect the computer from ac power and all connected cables. 3. Remove the power adapter bracket. 4. Remove the power cord. 5. Remove the power adapter. Chapter 6 Hardware removal and installation...
  • Page 70 6. Install the power adapter. 7. Install the power cord. 8. Install the power adapter bracket. 9. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. M90q Hardware Maintenance Manual...

  • Page 71: Dust Shield

    Dust shield Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Replacement procedure 1. Turn off the computer and remove all connected devices. 2. Disconnect the computer from ac power and all connected cables. 3.

  • Page 72: Rear Wi-Fi Antenna

    4. Install the dust shield. 5. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Rear Wi-Fi antenna Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.

  • Page 73: Computer Cover

    3. Remove the rear Wi-Fi antenna. 4. Install the rear Wi-Fi antenna. 5. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Computer cover Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
  • Page 74 Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Replacement procedure 1. Turn off the computer and remove all connected devices. 2. Disconnect the computer from ac power and all connected cables. 3.

  • Page 75: Hard Disk Drive And Hard Disk Drive Bracket

    12. Reconnect the external cables to the corresponding connectors on the computer, and then reconnect the power cord to the electrical outlet. Note: If a locking device is available, use it to lock the computer. Hard disk drive and hard disk drive bracket Prerequisite Before you start, read Chapter 1 “Important safety information”...
  • Page 76 4. Remove the hard disk drive from the bracket. 5. Install the hard disk drive into the bracket. M90q Hardware Maintenance Manual...

  • Page 77: Internal Speaker

    6. Install the hard disk drive and the bracket. 7. Connect the hard disk drive cable to the hard disk drive. 8. Reinstall all removed parts. Internal speaker Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.

  • Page 78: System Fan

    3. Remove the internal speaker. 4. Install the internal speaker. 5. Connect the internal speaker cable to the internal speaker connector on the system board. 6. Reinstall all removed parts. System fan Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.

  • Page 79: Coin-Cell Battery

    Replacement procedure 1. Remove the computer cover. See “Computer cover” on page 67. 2. Remove the internal speaker, if any. See “Internal speaker” on page 71. 3. Disconnect the system fan cable from the system fan connector on the system board. 4.
  • Page 80 The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell battery lasts forever. If the coin-cell battery fails, the date and time information is lost. An error message is displayed when you turn on the computer. Replacement procedure 1.

  • Page 81: Wi-Fi Card And Wi-Fi Card Shield

    7. Secure the coin-cell battery with the latch. 8. Reinstall all removed parts. 9. Reset the system date and time in the UEFI BIOS menu. To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” in the Safety and Warranty Guide.
  • Page 82 3. Remove the Wi-Fi card shied. 4. Disconnect the Wi-Fi antennas from the Wi-Fi card. 5. Remove the Wi-Fi card. M90q Hardware Maintenance Manual...

  • Page 83: Bottom Cover

    6. Install the Wi-Fi card. 7. Connect the Wi-Fi antennas to the Wi-Fi card. 8. Install the Wi-Fi card shield. 9. Reinstall all removed parts. Bottom cover Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.

  • Page 84: Memory Module

    3. Remove the bottom cover. 4. Install the bottom cover. 5. Turn over the computer so that the bottom cover is facing down. 6. Reinstall the removed parts. Memory module Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions.
  • Page 85 4. Remove the memory module. 5. Install the memory module. 6. Secure the memory module with the latches. Chapter 6 Hardware removal and installation...

  • Page 86: M.2 Solid-State Drive

    Attention: • To replace the Intel Optane memory, go to https://support.lenovo.com/docs/tg_ssd • The M.2 solid-state drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. When handling the M.2 solid-state drive, observe the following guidelines: – Replace the M.2 solid-state drive only for upgrade or repair. The M.2 solid-state drive is not designed for frequent changes or replacement.

  • Page 87: Rear Wi-Fi Antenna Cable

    5. IInstall the M.2 solid-state drive. 6. Close the retention latch. 7. Reinstall all removed parts. Rear Wi-Fi antenna cable Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Removal steps 1.

  • Page 88: Front Wi-Fi Antenna

    Front Wi-Fi antenna Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Removal steps 1. Remove the computer cover. See “Computer cover” on page 67. 2. Remove the hard disk drive, if any. See “Hard disk drive and hard disk drive bracket” on page 69. 3.

  • Page 89: Antenna Bracket

    Antenna bracket Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. Removal steps 1. Remove the computer cover. See “Computer cover” on page 67. 2. Remove the hard disk drive, if any. See “Hard disk drive and hard disk drive bracket” on page 69. 3.
  • Page 90 5. Remove the front Wi-Fi antenna, if any. See “Front Wi-Fi antenna” on page 82. 6. Remove the antenna bracket. Heat sink Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. The heat sink might be very hot.
  • Page 91 Microprocessor Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Removal steps 1.
  • Page 92 System board Prerequisite Before you start, read Chapter 1 “Important safety information” on page 1 and print the following instructions. The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool. Notes: •...
  • Page 93 • Your microprocessor sockets and socket covers might look slightly different from the illustrations in this topic. • Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor. Removal steps of system board 1. Remove the computer cover. See “Computer cover” on page 67. 2.
  • Page 94 The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling. Microprocessor socket cover installation procedure 1. After you have removed the microprocessor from the failing system board, close the microprocessor retainer.
  • Page 95 Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead.
  • Page 96 Actual results may vary. Users of this document should verify the applicable data for their specific environment. This document is copyrighted by Lenovo and is not covered by any open source license, including any Linux agreement(s) which may accompany software included with this product. Lenovo may update this document at any time without notice.

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