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XPS 13 7390 2-in-1 Service Manual

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Removing 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.

  1. Follow the procedure in Before working inside your computer.
  2. Remove the base cover.
  3. Remove the battery.

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 removal procedure.

Image: Disconnecting the display cable and camera cable

Image: Removing the system board

Image: Removing the power-button and fingerprint reader bracket from the system board

Steps

  1. Loosen the captive screw (M1.6x3) that secures the display-cable bracket to the system board.
  2. Lift the display-cable bracket off the system board.
  3. Peel the tapes that secure the display cable and camera cable to the system board.
  4. Using the tape as a pull tab, disconnect the display cable and camera cable from the system board.
  5. Remove the display cable and camera cable from the routing guides on the system board.
  6. Remove the screw (M1.6x3) and the screw (M1.6x2) that secures the type-C bracket to the system board.
    NOTE: The M1.6x2 screw has a bigger head than the M1.6x3 screw.
  7. Lift the type-C bracket off the system board.
  8. Disconnect the speaker cable from the system board.
  9. Open the latch and disconnect the fingerprint-reader cable from the system board.
  10. Peel off the fingerprint-reader daughter-board from the system board.
  11. Open the latch and disconnect the keyboard-controller board cable from the system board.
  12. Remove the four screws (M1.6x2.5), three screws (M1.2x3), and one captive screw (M1.2x4) that secure the system board to the palm-rest assembly.
  13. Lift the system board off the palm-rest assembly.
  14. Remove the power button and fingerprint-reader bracket from the palm-rest assembly.
  15. Place the bracket and the system board on a dry, flat, and clean surface.

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