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Inspiron 27-7790 Service Manual

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Installing the system board

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The following image indicates the connectors on your system board.
Figure 1. System-board connectors
Image: System board
  1. Memory module
  2. Camera cable
  3. Touchscreen cable
  4. Debug port
  5. Coin-cell battery
  6. Fan cable
  7. Microphones cable
  8. Media-card reader cable
  9. Speaker cable
  10. Power-button board cable
  11. Display cable
  12. Hard-drive connector
  13. Backlit cable

The following image indicates the location of system board and provides a visual representation of the installation procedure.

Image: Installing the system board

Steps

  1. Align the screw holes on the system board with the screw holes on the display-assembly base.
  2. Replace the six screws (M3x5) that secure the system board to the display-assembly base.
  3. Connect the camera cable to the system board.
  4. Connect the touchscreen cable to the system board.
  5. Connect the fan cable to the system board.
  6. Connect the microphone-module cable to the system board.
  7. Connect the media-card reader cable to the system board.
  8. Connect the speaker cable to the system board.
  9. Connect the power-button board cable to the system board and close the latch to secure the cable.
  10. Connect the display cable to the system board.
  11. Connect the backlit cable to the system board.

Next steps

  1. Install the heat sink.
  2. Install the solid-state drive.
  3. Install the wireless card.
  4. Install the memory modules.
  5. Install the system-board shield.
  6. Install the stand.
  7. Install the bottom cover.
  8. Install the back cover.
  9. Follow the procedure in After working inside your computer.
    NOTE Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board.
    NOTE Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program. You must make the appropriate changes again after you replace the system board.

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