HP V4200 - Manual (Page 167)

Removal and Replacement Procedures
Maintenance and Service Guide 5–61
2. Remove the 2 Phillips PM2.0×4.0 screws 1 that secure the
modem board to the system board.
3. Lift the right side of the modem board 2 to disconnect
the modem board from the system board.
4. Disconnect the modem cable 3 from the modem board.
5. Remove the modem board.
Removing the Modem Board
Reverse the above procedure to install the modem board.