Dell Latitude D400 Service Manual page 31

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Modem
CAUTION: Before performing the following procedures, read the safety instructions in your System Information Guide.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such
as the back panel) on the computer.
1. Follow the instructions in "Preparing to Work Inside the
NOTICE: Handle components and cards by their edges, and avoid touching pins and contacts. Ground yourself by touching a metal connector on the
back of the computer. Continue to ground yourself periodically during this procedure.
2. Turn the computer over, loosen the captive screws on the memory module/modem cover, and then remove the cover.
1 M2 x 5-mm screw 1428U
2 pull-tab
3 modem cable
3. If a modem is not already installed, go to step 4. If you are replacing a modem, remove the existing modem:
a. Remove the M2 x 5-mm screw securing the modem to the system board, and set it aside.
b. Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board, and disconnect the modem cable.
4. Connect the modem cable to the modem.
NOTICE: The cable connectors are keyed for correct insertion; do not force the connections.
5. Align the modem with the screw hole, and press the modem into the connector on the system board.
6. Install the screw to secure the modem to the system board.
7. Replace the modem cover.
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Computer" to remove the battery and prepare the computer for work.