This article explains how to install a modem in a Power Mac G4 (Gigabit Ethernet) computer. You may also view the following procedure in QuickTime at http://www.info.apple.com/installparts .

Be sure to follow the instructions in this sheet carefully. Failure to follow these instructions could result in damage to your equipment and may void your warranty.

Replacing the modem requires five basic steps:

• Turn off the computer.
• Open the computer.
• Remove the installed modem.
• Install the replacement modem.
• Close the computer.

Tools Required

No tools are required for this procedure.

Electrostatic Discharge (ESD )

Static electricity, a normal and natural phenomenon, builds up on your body as you walk around. You experience an electrostatic discharge (ESD) when you touch an object and feel a spark. ESD can cause damage to the internal components of your computer. Avoid walking around while performing this procedure, and follow the instructions carefully when you are asked to discharge static electricity.

Opening the Computer

Warning: Always turn off your computer before opening it to avoid damaging its internal components.

1. Place your computer on a clean, flat surface.

2. If you think your computer is in sleep, press the power button on the front of the computer to wake it.

3. Shut down your computer by opening the Special menu and choosing Shut Down. Then wait five minutes for the computer's internal components to cool down.

4. If you attached a security cable through the computer's lockable cover latch, remove the cable.

5. Unplug all other cables from the computer except the power cord.

6. Touch the metal PCI access covers on the back of the computer. Important: To avoid electrostatic discharge, always ground yourself by touching the port access covers before you touch any parts or install any components inside the computer. To avoid static electricity building back up in your body, do not walk around the room until you have completed your installation and closed the computer.

7. Unplug the power cord.

8. Lift the latch on the right side access panel

9. Gently lower the access panel until it lies flat. To avoid scratching the case, lower the panel onto a soft, clean cloth.

Removing the Installed Modem

1. Using a Phillips screwdriver, remove the modem's two mounting screws.

2. Gently pull back the small black latch that holds the modem in place.

3. Lift the modem straight up a short distance to disconnect it from the logic board.

4. Disconnect the modem cable from the modem.

5. Remove the modem from the computer.

1. Reconnect the modem cable to the cable connector on the replacement modem.

2. Gently pull back the small black latch, slide the modem into place, and plug the modem into the logic board connector.

3. Replace the two modem screws and tighten to secure the modem to the logic board.

4. Tuck the modem cable down so that it doesn't touch the large metal heat sink.

1. Raise the side access panel, lift the latch, and press the panel against the case until it snaps securely into place.

2. Reconnect all cables and restart your computer.

Repackaging the Modem

Repackage the modem you removed from the computer in the static-proof bag and box that you received with the replacement modem. Seal the box with the tape included, and affix the return label.