HP PAVILION 311 Maintenance And Service Manual page 63

Removal and replacement procedures
3. Turn the computer display-side up, with the front toward you.
4. Open the computer as far as possible.
5. Lift the rear edge 1 and then the left edge 2 of the keyboard until it rests at an angle.
6. Slide the keyboard 3 back until it rests on the display.
7. Release the zero insertion force (ZIF) connector 1 to which the keyboard cable is attached, and then
disconnect the keyboard cable 2 from the system board.
8. Remove the keyboard.
Reverse this procedure to install the keyboard.
Maintenance and Service Guide 4–23