HP 520 Maintenance And Service Manual page 71

Remove the two Phillips PM2.0×7.0 screws (1) and two Phillips PM2.0×4.0 screws (2) that secure
2.
the PC Card assembly to the system board.
Turn the system board top-side up, with the PC Card eject button toward you.
3.
Disengage the slots on the PC Card assembly from the tabs (1) on the PC Card connector.
4.
Remove the PC Card assembly (2) from the system board.
5.
Reverse this procedure to install the PC Card assembly.
Component replacement procedures 63