Compaq Presario,Presario 900 Maintenance And Service Manual page 151

2. Turn the system board bottom side up with the rear panel
facing forward.
3. Remove the PM2.0 × 4.5 screw 1 that secures the modem
ground cable to the system board (Figure 5-45).
4. Disconnect the modem cable 2 from the system board.
5. Remove the cable from the clips 3 on the system board.
Figure 5-45. Removing the Modem Cable
Reverse the preceding procedures to install the modem cable.
Maintenance and Service Guide
Removal and Replacement Procedures
5–59