Latitude 3340/Latitude 3340 2-in-1 Service Manual

Installing the I/O board

About this task

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

CAUTION:The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable.

1. Align and place the I/O board on the palm-rest and keyboard assembly.
2. Align the screw holes on the I/O board with the screw holes on the palm-rest and keyboard assembly.
3. Replace the two screws (M2x3) to secure the I/O board to the palm-rest and keyboard assembly.
4. Connect the fingerprint reader flexible printed circuits to the connector on the I/O board.
   NOTE:This procedure applies only to systems shipped with a power button with fingerprint reader installed.
5. Connect the coin-cell battery cable to the connector on the I/O board.
6. Connect the I/O-board cable to the connector on the I/O board and close its latch.
7. Gently press the left display hinge in downward direction towards the system.
8. Align the screw holes on the left display hinge with the screw holes on the system.
9. Replace the two screws (M2.5x4) to secure the left display hinge to the system.