HP ProBook 640 G1 Maintenance And Service Manual page 100

2. Remove the fourteen Torx T8 screws that secure the top cover to the computer.
3. Remove the following screws that secure the base enclosure to the computer:
(1) Two Torx T8 screws in the optical drive bay
(2) Three Torx T8 screws in the battery bay
(3) Two Phillips screws
4. Remove the memory card (4).
5. Turn the computer right side up with the front toward you.
6. Lift the front edge of the base enclosure until the left and right sides and the rear edge detach from the
computer.
7. Disconnect the serial connector cable from the system board.
92 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts