Dell Inspiron 7400 Service Manual
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Dell Inspiron 7400 Service Manual

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Inspiron 7400
Service Manual
Regulatory Model: P130G
Regulatory Type: P130G003
September 2020
Rev. A00

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Summary of Contents for Dell Inspiron 7400

  • Page 1 Inspiron 7400 Service Manual Regulatory Model: P130G Regulatory Type: P130G003 September 2020 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

  • Page 3: Table Of Contents

    Transporting sensitive components..........................8 After working inside your computer..........................8 Chapter 2: Removing and installing components................9 Recommended tools................................9 Screw list....................................9 Major components of Inspiron 7400..........................10 Base cover................................... 12 Removing the base cover............................12 Installing the base cover.............................14 Battery....................................16 Lithium-ion battery precautions..........................16 Removing the 4-cell battery............................
  • Page 4 Deleting or changing an existing system setup password................. 75 Clearing CMOS settings.............................75 Clearing BIOS (System Setup) and System passwords..................76 Chapter 5: Troubleshooting......................77 Locate the Service Tag or Express Service Code of your Dell computer ..........77 System diagnostic lights..............................77 SupportAssist diagnostics............................... 78 Recovering the operating system..........................78 Flashing BIOS (USB key)..............................79...
  • Page 5 Flea power release................................80 Chapter 6: Getting help and contacting Dell.................81 Contents...

  • Page 6: Chapter 1: Working Inside Your Computer

    You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.

  • Page 7: Electrostatic Discharge-Esd Protection

    ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

  • Page 8: Transporting Sensitive Components

    It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.

  • Page 9: Chapter 2: Removing And Installing Components

    Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Recommended tools The procedures in this document may require the following tools: ● Phillips screwdriver #0 ● Phillips screwdriver #1 ●...

  • Page 10: Major Components Of Inspiron 7400

    Wireless-card bracket System board M2x3 System board Palm-rest and keyboard M2x2 assembly NOTE: Only on computers with a 6-cell battery Major components of Inspiron 7400 The following image shows the major components of Inspiron 7400. Removing and installing components...
  • Page 11 16. fan 17. battery NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for purchase options.

  • Page 12: Base Cover

    Base cover Removing the base cover Prerequisites 1. Follow the procedure in Before working inside your computer. About this task NOTE: Before removing the base cover, ensure that there is no micro-SD card installed in the micro-SD card slot on your computer.
  • Page 13 Removing and installing components...

  • Page 14: Installing The Base Cover

    Steps 1. Remove the four screws (M2x5) that secure the base cover to the palm-rest and keyboard assembly. 2. Loosen the three captive screws (M2x3.5+2.5) that secure the base cover to the palm-rest and keyboard assembly. 3. Using a plastic scribe, pry the base cover from the middle and continue to work on the sides to open the base cover. 4.
  • Page 15 Removing and installing components...

  • Page 16: Battery

    Steps 1. Connect the battery cable to the connector on the system board if disconnected. 2. Place and snap the base cover into place on the palm-rest and keyboard assembly. 3. Tighten the three captive screws (M2x3.5+2.5) that secure the base cover to the palm-rest and keyboard assembly. 4.

  • Page 17: Removing The 4-Cell Battery

    ● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.

  • Page 18: Installing The 4-Cell Battery

    Installing the 4-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task NOTE: The 4-cell battery can be identified by the 52 Wh printout on the left side of the battery. The following images indicate the location of the 4-cell battery and provides a visual representation of the installation procedure.
  • Page 19 About this task NOTE: The 6-cell battery can be identified by the 78 Wh printout on the left side of the battery. The following images indicate the location of the 6-cell battery and provides a visual representation of the removal procedure. Steps 1.

  • Page 20: Installing The 6-Cell Battery

    Installing the 6-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task NOTE: The 6-cell battery can be identified by the 78 Wh printout on the left side of the battery. The following images indicate the location of the 6-cell battery and provides a visual representation of the installation procedure.

  • Page 21: Solid-State Drive

    CAUTION: Ensure that the battery cable is tucked between the battery and the system board when placing the battery on the palm-rest and keyboard assembly to avoiding pinching the cable and damaging your computer. 3. Place the battery on palm-rest and keyboard assembly. 4.

  • Page 22: Installing The M.2 2230 Solid-State Drive

    Steps 1. Lift the Mylar that covers the system board. 2. Peel the thermal tape that covers the M.2230 solid-state drive and bracket. 3. Remove the screw (M2x2.5) that secures the M.2 2230 bracket to the system board. 4. Slide and lift the M.2 2230 bracket off the system board. 5.
  • Page 23 ● M.2 2280 solid-state drive ● M.2 2280 Intel Optane H10 The following images indicate the location of the M.2 2230 solid-state drive and provides a visual representation of the installation procedure. Steps 1. Lift the Mylar off the system board. 2.

  • Page 24: Removing The M.2 2280 Solid-State Drive/Intel Optane H10

    Removing the M.2 2280 solid-state drive/Intel Optane H10 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: This procedure applies only to computers shipped with a M.2 2280 solid-state drive/Intel Optane H10 installed. NOTE: The M.2 card installed on your computer will depend on the configuration ordered.

  • Page 25: Installing The M.2 2280 Solid-State Drive/Intel Optane H10

    Steps 1. Lift the Mylar that covers the system board. 2. Peel the thermal tape that covers the M.2 2280 solid-state drive. 3. Remove the screw (M2x2.5) that secures the M.2 2280 solid-state drive/Intel Optane H10 to the palm-rest and keyboard assembly.
  • Page 26 Steps 1. Lift the Mylar that covers the system board. 2. Align the notch on the M.2 2280 solid-state drive/Intel Optane H10 with the tab on the M.2 card slot on the system board. 3. Slide the M.2 2280 solid-state drive/Intel Optane H10 into the M.2 card slot on the system board. 4.

  • Page 27: Heat Sink

    Heat sink Removing the heat sink Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task CAUTION: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it.

  • Page 28: Installing The Heat Sink

    Steps 1. Lift the Mylar that covers the system board. NOTE: The number of screws varies depending on the configuration ordered. 2. In reverse sequential order (4>3>2>1) loosen the four captive screws that secure the heat sink to the system board. 3.

  • Page 29: Fan

    Steps 1. Place the heat sink on the system board. 2. In sequential order (1>2>3>4) tighten the four captive screws that secure the heat sink to the system board. NOTE: The number of screws varies depending on the configuration ordered. 3.

  • Page 30: Installing The Fan (4-Cell Battery)

    2. Remove the base cover. About this task The following images indicate the location of the fan (4-cell battery) and provides a visual representation of the removal procedure. Steps 1. Lift the Mylar that covers the system board. 2. Remove the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 3.

  • Page 31: Removing The Fan (6-Cell Battery)

    Steps 1. Lift the Mylar that covers the system board. 2. Place the fan on the palm-rest and keyboard assembly. 3. Align the screw holes on the fan to the screw holes on the palm-rest and keyboard assembly. 4. Replace the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 5.

  • Page 32: Installing The Fan (6-Cell Battery)

    Steps 1. Lift the Mylar that covers the system board. 2. Remove the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 3. Disconnect the fan cable from the system board. 4. Lift the fan from the palm-rest and keyboard assembly. Installing the fan (6-cell battery) Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

  • Page 33: Speakers

    Steps 1. Lift the Mylar that covers the system board. 2. Place the fan on the palm-rest and keyboard assembly. 3. Align the screw holes on the fan to the screw holes on the palm-rest and keyboard assembly. 4. Replace the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 5.

  • Page 34: Installing The Speakers

    Steps 1. Open the latch and disconnect the touchpad cable from the system board. 2. Open the latch and disconnect the keyboard cable from the system board. 3. Open the latch and disconnect the keyboard-backlight cable from the system board. 4.
  • Page 35 Steps 1. Using the alignment posts, place the speakers on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speaker. 2. Adhere the tapes that secure the cable to the palm-rest and keyboard assembly. 3.

  • Page 36: Display Assembly

    Display assembly Removing the display assembly Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task The following images indicate the location of the display assembly and provides a visual representation of the removal procedure.

  • Page 37: Installing The Display Assembly

    Steps 1. Remove the two screws (M2x4) that secure the left-display hinge to the palm-rest and keyboard assembly. 2. Pry open the left-display hinge. 3. Lift the Mylar off the system board. 4. Peel the tape that secures the display-cable latch to the system board. 5.
  • Page 38 Removing and installing components...
  • Page 39 Steps 1. Place the display assembly on a clean and flat surface with the display panel facing up. 2. Place the palm-rest and keyboard assembly under the display hinges. CAUTION: To avoid damaging the display, do not slide the palm-rest and keyboard assembly over the display assembly.

  • Page 40: Power-Adapter Port

    Power-adapter port Removing the power-adapter port Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task The following images indicate the location of the power-adapter port and provides a visual representation of the removal procedure.

  • Page 41: Installing The Power-Adapter Port

    5. Remove the screw (M2x3) that secures the power-adapter to the palm-rest and keyboard assembly. 6. Lift the power-adapter port from its slot on the palm-rest and keyboard assembly. Installing the power-adapter port Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the power-adapter port and provides a visual representation of the installation procedure.

  • Page 42: Coin-Cell Battery

    6. Close the right-display hinge and align the screw holes on the right-display hinge with the screw holes on the palm-rest and keyboard assembly. 7. Replace the two screws (M2x4) that secure the right-display hinge to the palm-rest and keyboard assembly. 8.

  • Page 43: Installing The Coin-Cell Battery

    Installing the coin-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the coin-cell battery and provides a visual representation of the installation procedure.
  • Page 44 About this task NOTE: The antenna module can only be removed from the location shown on computers shipped with 6-cell battery configurations. The following images indicate the location of the antenna module and provides a visual representation of the removal procedure. Steps 1.

  • Page 45: Installing The Antenna Module

    8. Peel the tape that secures the antenna cables to the palm-rest and keyboard assembly. 9. Remove the antenna cables from the routing guides on the palm-rest and keyboard assembly. 10. Remove the screw (M2x2.5) that secures the antenna module to the palm-rest and keyboard assembly. 11.
  • Page 46 Steps 1. Place the antenna module on the palm-rest and keyboard assembly. 2. Replace the screw (M2x2.5) that secures the antenna module to the palm-rest and keyboard assembly. 3. Route the antenna cables through the routing guides on the palm-rest and keyboard assembly. 4.

  • Page 47: Touchpad

    Table 2. Antenna-cable color scheme (continued) Connectors on the wireless card Antenna-cable color Auxiliary (black triangle) Black 6. Place the wireless-card bracket on the wireless card. 7. Replace the screw (M2x2.5) that secures the wireless-card bracket to the system board. 8.

  • Page 48: Installing The Touchpad

    Steps 1. Open the latch and disconnect the the touchpad cable from the system board. 2. Remove the three screws (M2x2) that secure the touchpad bracket to the palm-rest and keyboard assembly. 3. Lift the touchpad bracket off the touchpad. 4.

  • Page 49: I/O Board

    Next steps 1. Install the antenna module, only for computers with a 6-cell (78 Wh) battery. 2. Install the 4-cell battery or the 6-cell battery, whichever applicable. 3. Install the base cover. 4. Follow the procedure in After working inside your computer.

  • Page 50: Installing The Io Board

    Installing the IO board Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the I/O board and provides a visual representation of the installation procedure. Steps 1.

  • Page 51: Power Button

    Power button Removing the power-button with optional fingerprint reader Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the 4-cell battery or the 6-cell battery, whichever applicable. 4. Remove the fan (4-cell battery) or the fan (6-cell battery), whichever applicable.

  • Page 52: Fingerprint-Reader Board

    About this task The following images indicate the location of the power-button with optional fingerprint reader and provides a visual representation of the installation procedure. Steps 1. Using the alignment posts, place the power-button with optional fingerprint reader into its slot on the palm-rest and keyboard assembly.

  • Page 53: Installing The Fingerprint-Reader Board

    3. Remove the 4-cell battery or the 6-cell battery, whichever applicable. 4. Remove the fan (4-cell battery) or the fan (6-cell battery), whichever applicable. 5. Remove the board. About this task The following images indicate the location of the fingerprint-reader board and provides a visual representation of the removal procedure.

  • Page 54: System Board

    Steps 1. Place and slide the fingerprint-reader board under the securing clip on the palm-rest and keyboard assembly. 2. Connect the fingerprint-reader board cable to the fingerprint-reader board and close the latch. 3. Connect the power-button cable to the fingerprint-reader board and close the latch. Next steps 1.
  • Page 55 1. Display cable 2. Power-adapter port cable 3. Speaker cable 4. Keyboard cable 5. Keyboard-backlight cable 6. Touchpad cable 7. I/O-board cable 8. Fingerprint-reader cable 9. Coin-cell battery cable 10. Wireless-card bracket and antenna cables The following images indicate the location of the system board and provides a visual representation of the removal procedure. Removing and installing components...
  • Page 56 Steps 1. Peel the tape that secures the display-cable latch to the system board. 2. Lift the latch and disconnect the display cable from the system board. Removing and installing components...

  • Page 57: Installing The System Board

    3. Remove the two screws (M2x4) that secure the right-display hinge to the palm-rest and keyboard assembly. 4. Pry open the right-display hinge. 5. Remove the screw (M2x2.5) that secures the wireless-card bracket to the system board. 6. Lift the wireless-card bracket off the system board. 7.
  • Page 58 6. Touchpad cable 7. I/O-board cable 8. Fingerprint-reader cable 9. Coin-cell battery cable 10. Wireless-card bracket and antenna cables The following images indicate the location of the system board and provides a visual representation of the installation procedure. Removing and installing components...
  • Page 59 Steps 1. Align the I/O ports on the system board to the I/O port slots on the palm-rest and keyboard assembly. 2. Using the alignment posts, slide and at angle and place the system board on the palm-rest and keyboard assembly. 3.

  • Page 60: Palm-Rest And Keyboard Assembly

    14. Place the wireless-card bracket on the wireless card. 15. Replace the screw (M2x2.5) that secures the wireless-card bracket to the system board. 16. Close the right-display hinge and align the screw holes on the right-display hinge with the screw holes on the palm-rest and keyboard assembly 17.

  • Page 61: Installing The Palm-Rest And Keyboard Assembly

    Steps After performing the pre-requisites you are left with the palm-rest and keyboard assembly. Installing the palm-rest and keyboard assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the palm-rest and keyboard assembly and provides a visual representation of the installation procedure.
  • Page 62 Steps Place the palm-rest and keyboard assembly on a flat and clean surface and perform the post-requisites to install the palm-rest and keyboard assembly. Next steps 1. Install the speakers. 2. Install the system board. 3. Install the power button. 4.

  • Page 63: Chapter 3: Drivers And Downloads

    Drivers and downloads When troubleshooting, downloading or installing drivers it is recommended that you read the Dell Knowledge Based article, Drivers and Downloads FAQ SLN128938. Drivers and downloads...

  • Page 64: Chapter 4: System Setup

    System setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed. NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen information for future reference.

  • Page 65: One Time Boot Menu

    One time boot menu To enter one time boot menu, turn on your computer, and then press F2 immediately. NOTE: It is recommended to shutdown the computer if it is on. The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options are: ●...
  • Page 66 Table 5. System setup options—System information menu (continued) General-System Information Maximum Clock Speed Displays the maximum processor clock speed. Intel Smart Cache Displays the Intel Smart Cache size. HT Capable Displays whether the processor is HyperThreading (HT) capable. 64-Bit Technology Displays whether 64-bit technology is used.
  • Page 67 Table 6. System setup options—System Configuration menu (continued) System Configuration Enable External USB Port Enable or disable booting from USB mass storage devices connected to external USB port. Thunderbolt Adapter Configuration Enable or disable Thunderbolt technology support. Audio Enable or disable the integrated audio controller. Keyboard Illumination Enables you to choose the operating mode of the keyboard illumination feature.
  • Page 68 Table 9. System setup options—Secure Boot menu (continued) Secure Boot Custom Mode Key Management Select the custom values for expert key management. Table 10. System setup options—Intel Software Guard Extensions menu Intel Software Guard Extensions Intel SGX Enable Enable or disable Intel Software Guard Extensions. Enclave Memory Size Set the Intel Software Guard Extensions Enclave Reserve Memory Size.

  • Page 69: Updating The Bios In Windows

    SupportAssist System Resolution Auto OS Recovery Threshold Control the automatic boot flow for SupportAssist System Resolution Console and for Dell OS Recovery tool. SupportAssist OS Recovery Enable or disable the boot flow for SupportAssist OS Recovery tool in the even of certain system errors.

  • Page 70: Updating Bios On Systems With Bitlocker Enabled

    3. Insert the USB flash drive into the computer that requires the BIOS update. 4. Restart the computer and press F12 when the Dell logo appears to display the One Time Boot Menu. 5. Using arrow keys, select USB Storage Device and press Enter.

  • Page 71: Flashing The Bios From The F12 One-Time Boot Menu

    Time boot menu on the system. Most Dell systems built after 2012 have this capability and you can confirm by booting your system to the F12 One-Time Boot Menu to see if BIOS FLASH UPDATE is listed as a boot option for your system. If the option is listed, then the BIOS supports this BIOS update option.
  • Page 72 3. The flash BIOS menu will open, and then click the Flash from file. 4. Select external USB device. System setup...
  • Page 73 5. Once the file is selected, Double click the flash target file, then press submit. 6. Click the Update BIOS then system will reboot to flash the BIOS. System setup...

  • Page 74: System And Setup Password

    7. Once complete, the system will reboot and the BIOS update process is completed. System and setup password Table 16. System and setup password Password type Description System password Password that you must enter to log on to your system. Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

  • Page 75: Deleting Or Changing An Existing System Setup Password

    2. Select System/Admin Password and create a password in the Enter the new password field. Use the following guidelines to assign the system password: ● A password can have up to 32 characters. ● The password can contain the numbers 0 through 9. ●...

  • Page 76: Clearing Bios (System Setup) And System Passwords

    Clearing BIOS (System Setup) and System passwords About this task To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell. NOTE: For information on how to reset Windows or application passwords, refer to the documentation accompanying Windows or your application.

  • Page 77: Chapter 5: Troubleshooting

    Locate the Service Tag or Express Service Code of your Dell computer Your Dell computer is uniquely identified by a Service Tag or Express Service Code. To view relevant support resources for your Dell computer, we recommend entering the Service Tag or Express Service Code at www.dell.com/support.

  • Page 78: Supportassist Diagnostics

    It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state. You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures.

  • Page 79: Flashing Bios (Usb Key)

    4. Connect the bootable USB drive to the computer that needs the BIOS update. 5. Restart the computer and press F12 when the Dell logo is displayed on the screen. 6. Boot to the USB drive from the One Time Boot Menu.
  • Page 80 Flea power release About this task Flea power is the residual static electricity that remains on the computer even after it has been powered off and the battery has been removed. The following procedure provides the instructions on how to conduct flea power release: Steps 1.
  • Page 81 Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 18. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell Tips...

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