Installing The I/O Board - Dell XPS 15 9520 Service Manual

Steps
1. Disconnect the I/O-board cable from the system board and I/O board, then lift the I/O-board cable from the system board.
2. Remove the screw (M2x4) that secures the USB Type-C port bracket to the system board and lift the bracket off the I/O
board.
3. Remove the screw (M2x4) securing the IO daughter board in place.
4. Lift the I/O board off the palm-rest and keyboard 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
The following image indicates the location of the I/O board and provides a visual representation of the installation procedure.
NOTE: The I/O board consists of the SD-card reader and the audio board.
Removing and installing components 37