HP Compaq NC6140 Maintenance And Service Manual page 140

Removal and Replacement Procedures
4. Remove the two Phillips PM2.5×3.0 screws 1 that secure the
modem module to the system board.
5. Lift the front edge of the modem module 2 to disconnect it
from the system board.
6. Disconnect the modem cable 3 from the modem module.
Removing the Modem Module
Reverse the above procedure to install the modem module.
6–50 Maintenance and Service Guide