Dell XPS 15 Service Manual page 36

6 Lift the video fan (JFAN_2) away from the palm-rest assembly.
1 routing guide
3 tape
5 video fan (JFAN_2)
7 Remove the screws that secure the processor fan (JFAN_1) to the system
board.
8 Note the routing of the display cable and remove the cable from the
processor fan (JFAN_1).
9 Disconnect the processor fan (JFAN_1) cable from the system board.
36
2 touch-screen cable
(optional)
4 fan cable
6 screws (2)