Dell XPS 15 (L502X, Early 2011) - Manual (Page 85)

USB Board 85
5 Replace the AC adapter connector (see "Replacing the AC-Adapter
Connector" on page 80).
6 Follow the instructions from step 8 to step 11 in "Replacing the Top
Cover" on page 69.
7 Replace the display assembly (see "Replacing the Display Assembly" on
page 52).
8 Replace the keyboard (see "Replacing the Keyboard" on page 45).
9 Replace the palm-rest assembly (see "Replacing the Palm-Rest Assembly"
on page 32).
10 Replace the memory module(s) (see "Replacing the Memory Module(s)"
on page 18).
11 Replace the module cover (see "Replacing the Module Cover" on page 16).
12 Replace the battery (see "Replacing the Battery" on page 14).
CAUTION: Before turning on the computer, replace all screws and ensure that no
stray screws remain inside the computer. Failure to do so may result in damage to
the computer.