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Latitude 9430/Latitude 9430 2-in-1 Service Manual

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Removing the USH daughter board

Prerequisites

NOTE For system shipped with USH daughter board only.
  1. Follow the procedure in Before working inside your computer.
    NOTE Ensure that your computer is in Service Mode. For more information see, step 6 in Before working inside your computer.
  2. Remove the SD card.
  3. Remove the SIM card tray.
  4. Remove the base cover.
  5. Remove the WWAN card.
  6. Remove the heat sink.
  7. Remove the display assembly.
  8. Remove the battery.
  9. Remove the I/O daughter board.
  10. Remove the system board.

About this task

The following image indicates the location of the USH daughter board and provides a visual representation of the removal procedure.

Remove IO board

Steps

  1. Gently disconnect the power button with fingerprint reader FPC cable from the connector on the USH daughter board.
  2. Peel off the USH daughter board FPC cable from the keyboard.
  3. Remove the two (M1.2x2.5) screws securing the USH daughter board to the palm-rest assembly.
    NOTE Do Not remove the screw which is used to secure the keyboard bracket in place.

  4. Lift the USH daughter board with the FPC cable off the system.
  5. Disconnect the USH daughter board FPC cable from USH daughter board.

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