Dell Pro 14 Plus/Dell Pro 14 Plus 2-in-1 PB14250/PB14250 2-in-1 (Intel Core Ultra 200V Series) Owner's Manual

Removing the I/O board

CAUTION:The information in this removal section is intended for authorized service technicians only.

Follow the procedure in Before working inside your computer.
Remove the SIM-card tray, if applicable.
Remove the base cover.
Remove the battery.
Remove the WWAN card, if applicable.
Remove the M.2 2230 solid state drive or the M.2 2280 solid state drive, as applicable.
Remove the system board.
NOTE:The system board can be removed and installed with the heat sink attached in order to simplify the procedure and preserve the thermal bond between the system board and heat sink.

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

Peel the USH-board cable from the I/O board.
NOTE: This step applies to models shipped with a USH board.
Remove the WWAN-antenna cables from the routing guides on the I/O board and move them away from the I/O board.
Remove the screw (M2x3) that secures the fingerprint-reader bracket to the I/O board. Lift the fingerprint-reader bracket bracket off the I/O board.
NOTE: The fingerprint-reader bracket covers both the fingerprint-reader connector and the Darwin-cable connector. Models that are shipped without fingerprint reader will still have a fingerprint-reader bracket that covers the Darwin-cable connector.
Disconnect the following cables from the connector on the I/O board:
1. Fingerprint-reader cable
2. Darwin cable
3. Fan cable
4. Touchpad cable
5. Speaker cable
Remove the four screws (M2x3) that secure the I/O board to the palm-rest assembly.
Carefully slide and remove the I/O board at angle from the palm-rest assembly.
NOTE:When replacing the I/O board, the WWAN-card thermal pad and Mylar tape must be transferred to the replacement I/O board.