Procedure - Dell XPS 8900 Service Manual

Procedure

NOTE: Note the routing of the cable as you remove it so that you can
reroute it correctly after you replace the power-button module.
1 Disconnect the power-button module cable from the system board.
For more information, see
1 power-button module
2 Note the power-button module cable routing and remove the cable from the
routing guides on the chassis.
"System-board components".
2 power-button module cable
81