Dell XPS 15 (L521X, Mid 2012) - Manual (Page 55)

3 Using the pull-tab, disconnect the display cable from the system board.
4 Disconnect the speaker cable, coin-cell-battery cable, I/O-board grounding cable,
and camera cable from the system board.
5 Lift the connector latches and, using the pull-tab, disconnect the I/O-board cable,
keyboard cable, keyboard-backlight cable, touchpad cable, and power/battery
status-light cable from the system board.
12 11 10
9
8
7
6 5 4 3
1
2
1 speaker cable 2 I/O-board grounding cable
3 coin-cell-battery cable 4 camera cable
5 pull-tabs (6) 6 display cable
7 connector latches (5) 8 power/battery status-light cable
9 touchpad cable 10 keyboard-backlight cable
11 keyboard cable 12 I/O-board cable
Removing the System Board | 55