HP 321 - Notebook PC Maintenance And Service Manual page 89

Remove the power switch board:
1. Release the ZIF connector (1) and disconnect the ribbon cable (2) from the system board.
2. Remove the Phillips M2.5×3.0 broadhead screw (1) that secures the board to the base pan,
raise the end of the board (2), and then slide the board out of the retainer (3).
Reverse this procedure to install the power button board.
Component replacement procedures 79