Dell Alienware 17 R2 Service Manual page 80

2 Disconnect the processor-fan cable, video-card fan cable, hard-drive
cable and power-adapter port cable from the system board.
1 processor-fan cable
3 video-card fan cable
5 hard-drive cable
3 Turn the computer over.
4 Disconnect the speaker and front AlienFX LED cables from the system
board.
80
2 power-adapter port cable
4 system board