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XPS 13 7390 2-in-1 Service Manual

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Installing the system board

Prerequisites

CAUTION: Back up all files on the solid-state drive (SSD) to an external storage device before getting your device ready for service. The SSD is soldered onto the system board, and the service replacement board does not have an operating system that is preinstalled on it.
Restore files from your backup after the device has been serviced with its reinstalled operating system.

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 connectors
  1. Speaker cable
  2. Fingerprint-reader cable
  3. Display cable
  4. Camera cable
  5. Keyboard-controller board cable

The following images indicate the location of system board and provide a visual representation of the installation procedure.

Image: Installing the system board

Image: Connecting the display cable and camera cable

Steps

  1. Align and place the power button and fingerprint-reader bracket on the palm-rest assembly.
  2. Align the screw holes on the system board with the screw holes on the palm-rest assembly.
  3. Replace the fours screws (M2x4), three screws (M1.2x3), and one screw (M1.2x4) that secure the system board to the palm-rest assembly.
  4. Connect the keyboard-controller board cable to the system board and close the latch to secure the cable.
  5. Connect the speaker cable to the system board.
  6. Adhere the fingerprint-reader board to the slot on the system board.
  7. Connect the fingerprint-reader cable to the system board and close the latch to secure the cable.
  8. Align the screw holes on the USB Type-C bracket to the screw holes on the system board.
  9. Replace the screw (M1.6x3) and the screw (M1.6x2) that secures the USB Type-C port bracket to the system board.
    NOTE: The M1.6x2 screw has a bigger head than the M1.6x3 screw.
  10. Route the display cable and camera cable through the routing guides on the system board.
  11. Connect the display cable and camera cable to the system board.
  12. Adhere the tapes that secure the display cable and camera cable to the system board.
  13. Align and place the display-cable bracket on the system board.
  14. Tighten the captive screw (M1.6x3) that secures the display-cable bracket to the system board.

Next steps

  1. Install the battery.
  2. Install the base cover.
  3. Follow the procedure in After working inside your computer.

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