Dell XPS 14 (L421X, Mid 2012) - Manual (Page 51)

Replacing the I/O Board
WARNING: Before working inside your computer, read the safety information
that shipped with your computer and follow the steps in "Before You Begin" on
page 9. After working inside your computer, follow the instructions in
"After Working Inside Your Computer" on page 11. For additional safety best
practices information, see the Regulatory Compliance Homepage at
dell.com/regulatory_compliance.
Procedure
1 Slide the I/O board under the tab on the palm-rest assembly.
2 Align the screw holes on the I/O board with the screw holes on the
palm-rest assembly and replace the screws that secure the I/O board to
the palm-rest assembly.
3 Slide the I/O-board ribbon cable into the connector on the I/O board and slide the
latches to secure the cable.
4 Slide the I/O-board cable into the connector on the I/O board and slide the latches
to secure the cable.
5 Connect the coin-cell battery cable to the I/O-board connector.
Postrequisites
1 Replace the mSATA/WWAN card. See "Replacing the mSATA/WWAN Card" on
page 35.
2 Replace the battery. See "Replacing the Battery" on page 26.
3 Replace the speakers. See "Replacing the Speakers" on page 24.
4 Follow the instructions from step 2 to step 6 in "Replacing the Base Cover" on
page 15.
Replacing the I/O Board | 51