HP 540 Maintenance And Service Manual page 56

2. Remove the two slotted Torx ST8M2.5×7.0 screws that secure the keyboard to the computer.
3. Turn the computer display-side up, with the front toward you.
4. Open the computer as far as possible.
5. Lift the switch cover (1) straight up until it disengages from the computer, and slide it back (2) until
it rests on the display assembly.
48 Chapter 4 Removal and replacement procedures