Dell Latitude XT3 (Mid 2011) - Manual (Page 70)

9. Remove the screw that secures the display closure sensor.
10. Remove the display closure sensor from the computer.
Installing the Display Closure Sensor
1. Place the display closure sensor in the compartment.
2. Tighten the screw to secure the display closure sensor to the system board.
3. Connect the display closure sensor flex cable to the system board.
4. Replace the palmrest.
5. Replace the base cover.
6. Replace the hard drive assembly.
7. Replace the keyboard.
8. Replace the keyboard trim.
9. Replace the back panel.
10. Replace the battery.
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