Dell XPS 15 (L521X, Mid 2012) - Manual (Page 17)

Replacing the Battery-LED 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 8. After working inside your computer, follow the instructions in
"After Working Inside Your Computer" on page 10. For additional safety best
practices information, see the Regulatory Compliance Homepage at
dell.com/regulatory_compliance.
Procedure
1 Slide the battery-LED board under the tab on the base cover and use the alignment
posts on the base cover to place the battery-LED board in position.
2 Replace the screw that secures the battery-LED board to the base cover.
3 Align the screw holes on the battery-LED-board bracket with the screw holes on
the base cover.
4 Replace the screws that secure the battery-LED-board bracket to the base cover.
Postrequisites
Follow the instructions from step 2 to step 7 in "Replacing the Base Cover" on page 14.
Replacing the Battery-LED Board | 17