HP Compaq Presario,Presario C770 Maintenance And Service Manual page 59

Remove the keyboard:
Remove the three Phillips PM2.5×9.0 screws that secure the keyboard to the computer.
1.
Turn the computer right-side up, with the front toward you.
2.
Open the computer as far as possible.
3.
Lift the rear edge of the keyboard (1) until it rests at an angle.
4.
Release the keyboard (2) by sliding it back until it rests on the display assembly.
5.
Component replacement procedures 51