Dell Alienware M17x R2 (Early 2010) - Manual (Page 65)

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CHAPTER 14: INPUT/OUTPUT BOARD
Remove the three screws that secure the input/output board to the system 11.
board and remove the earthing cable.
Tilt the input/output board at an angle and lift it out of the computer base.
12.
3
2
1
1 earthing cable 3 screws (3)
2 input/output board
Disconnect the speaker cable, right speaker light cable, and audio cable from 10.
the respective connectors on the system board and remove the cables from
the routing guides.
5
4
3 1 2
1 audio cable connector 4 right speaker light cable connector
2 earthing cable 5 speaker cable connector
3 input/output board