HP Nc6400 - Compaq Business Notebook Maintenance And Service Manual page 126

Removal and Replacement Procedures
8. Release the zero insertion force (ZIF) connector 1 to which
the keyboard cable is attached and disconnect the keyboard
cable 2.
9. Release the ZIF connector 3 to which the pointing stick
cable is attached and disconnect the pointing stick cable 4.
10. Remove the keyboard.
Disconnecting the Keyboard and Pointing Stick Cables
5–26 Maintenance and Service Guide