Installing The Io Board - Dell Vostro 3401 Service Manual

About this task
Steps
1. [For models shipped with a fingerprint reader] : Disconnect the fingerprint reader to IO daughter board FFC and IO daughter
board to system board FFC from the IO daughter board.
2. [For models shipped without a fingerprint reader] : Disconnect the power button FFC, IO daughter board FFC, and display
cable from the system board.
3. Peel back the power button FFC and IO daughter board FFC from the palm rest.
4. Remove the four (M2x4) screws that secure the IO board to the palmrest, and remove the IO board from the system.
5. Disconnect and remove the power button FFC and IO daughter board FFC from the IO daughter board.

Installing the IO board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 47