HP PAVILION 311 Maintenance And Service Manual page 65

3. Turn the computer right-side up, with the front toward you and the display open as far as possible.
4. Release and disconnect the following low insertion force (LIF) connector cables from the system board:
a. Power button board cable 1
b. TouchPad cable 2
c. TouchPad button board cable 3
d. WLAN button cable 4
5. Remove the 4 Phillips PM2.0×7.0 screws that secure the top cover to the base enclosure.
Maintenance and Service Guide
Removal and replacement procedures
4–25