Dell Alienware Alpha (Late 2014) - Manual (Page 66)

Procedure
1 Disconnect the USB-port cable, front-panel light board cable, and power-
button board cable from the system board.
For information on the location of connectors, see
“System- Board
Components” .
1 power-button board cable 2 front-panel light board
cable
3 USB-port cable
2 Remove the screws that secure the back panel to the chassis.
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