Dell Alienware 15 (Early 2015) - Manual (Page 116)

7 Peel the tape and disconnect the front AlienFX LED cable from the system
board.
1 latch 2 I/O-board cable
3 speaker cable 4 front AlienFX LED cable
5 tape
8 Remove the screws that secure the system board to the computer base.
9 Lift the system board at an angle and slide the ports on the system board
out of the slots on the computer base.
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