HP Compaq 6820s Maintenance And Service Manual page 55

Release the zero insertion force (ZIF) connector (1) to which the keyboard cable is attached, and
7.
disconnect the keyboard cable (2) from the system board.
Remove the keyboard.
8.
Release the ZIF connector (1) to which the button board cable is attached, and disconnect the button
9.
board cable (2) from the system board.
Remove the switch cover.
10.
Reverse this procedure to install the switch cover and keyboard.
Component replacement procedures 47