HP Compaq nc8430 Maintenance And Service Manual page 133

5. Turn the computer display-side up with the front toward you.
6. Open the computer as far as possible.
7. Use a flat-bladed screwdriver to lift up the left and right hinge
cover sections of the switch cover 1 to detach it from the
computer.
8. Swing the rear edge of the switch cover 2 up and toward you.
Releasing the Switch Cover
Maintenance and Service Guide
Removal and Replacement Procedures
5–43