HP Compaq Presario,Presario CQ42-121 Maintenance And Service Manual page 75

3. Remove the five Phillips PM2.5×6.5 screws (2), the two Phillips PM2.5x4.0 screws (3), and the
four Phillips PM2.5x3.0 screws (4) that secure the top cover to the base enclosure.
4. Turn the computer display-side up with the front toward you.
5. Open the computer as far as possible.
6. Release the ZIF connector to which the touchpad (1) is connected and disconnect the cable
from the system board.
7. Release the ZIF connector to which the touchpad button board cable (2) is connected and
disconnect the cable from the system board.
8. Disconnect the speaker cable (3) from the system board.
ENWW Component replacement procedures 65