Dell Latitude 3340 2-in-1 - I;O board replacement

I/O board
Removing the I/O board
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
About this task
The following images indicate the location of the I/O board and provide a visual representation of the removal 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.
Steps
1. Remove the two screws (M2.5x4) that secure the left display hinge to the system.
2. Lift the left display hinge in upward direction away from the system.
3. Open the latch and disconnect the I/O-board cable from the connector on the I/O board.
4. Disconnect the coin-cell battery cable from the connector on the I/O board.
5. Disconnect the fingerprint reader flexible printed circuits from the connector on the I/O board.
NOTE: This procedure applies only to systems shipped with a power button with fingerprint reader installed.
6. Remove the two screws (M2x3) that secure the I/O board to the palm-rest and keyboard assembly.
7. Lift the I/O board off the palm-rest and keyboard assembly.
Removing and installing components
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