Dell XPS 14 (L401X, Late 2010) - Manual (Page 90)

90 Daughter Board
11 Turn the top-cover assembly over.
12 Remove the processor fan and heat-sink assembly (see "Removing the
Processor Fan and Heat-Sink Assembly" on page 79).
13 Lift the connector latch and disconnect the daughter-board cable from the
connector on the daughter board.
14 Remove the screw that secures the daughter board to the top cover.
15 Carefully ease the connectors on the daughter board out of the slots in the
top cover, and lift the daughter board out of the top cover.
1 daughter-board cable 2 daughter board
3 screw
1
2
3