Dell XPS L401X Service Manual page 102

10 Remove the display assembly (see "Removing the Display Assembly" on
page 53).
11 Disconnect the power-button board cable, coin-cell battery cable, and
touch-pad status light cable from their connectors on the system board.
12 Follow the instructions from step 13 to step 18 in "Removing the Top
Cover" on page 69.
13 Remove the processor fan and heat-sink assembly (see "Removing the
Processor Fan and Heat-Sink Assembly" on page 79).
14 Remove the processor module (see "Removing the Processor Module" on
page 85).
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