HP Compaq nc6400 Maintenance And Service Manual page 121

4. Turn the computer display-side up with the front toward you.
5. Open the computer as far as possible.
6. Slide the four release tabs 1 on the rear edge of the keyboard
forward.
7. Lift the rear edge of the keyboard 2 and swing it up toward
you until it rests on the palm rest.
Releasing the Keyboard
Maintenance and Service Guide
Removal and Replacement Procedures
5–25