Installing The I/O Board - Dell Latitude 3420 Service Manual

NOTE: The following image is from systems without power-button board.
The following image indicates the location of the I/O board and provides a visual representation of the removal procedure.
Steps
1. For systems shipped with power button, peel the adhesive, open the latch and disconnect the power button cable from the
connector on the I/O board.
2. Open the latch and disconnect the I/O cable from the connector on the system board.
3. Disconnect the USB cable and coin-cell cable from the connectors on the system board.
4. Remove the two (M2x3) screws that secure the I/O board on the palmrest assembly.
5. Lift and remove the I/O board from the palmrest assembly.

Installing the I/O board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE:
NOTE: The following image is from systems without power button.
The following image indicates the location of the I/O board and provides a visual representation of the installation procedure.
72 Removing and installing components