Compaq 320, 321, 420, 421, 620 and 621 Notebook PC and HP 420 and 620 Notebook PC

4.
Turn the computer over so it is right-side up and remove four Torx M2.5×6.0 screws.
5. Release the ZIF connector (1) and remove the power switch cable (2).
84 Chapter 4 Removal and replacement procedures