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073-0800 Rev. A
Power Mac G4
Lower Fan
Replacement Instructions
Follow the instructions in this sheet carefully. Failure to follow these instructions could
damage your equipment and void its warranty.
Note:
Written and video instructions covering customer-installable parts are available at
http://www.info.apple.com/installparts/.
Warning: During this procedure, keep small parts away from children.
Warning: Sharp edges exist inside the computer. Use caution when performing this
procedure.
Tools Required
The following tools are required for this procedure:
• #2 Phillips screwdriver with a magnetized tip
• small flat-blade screwdriver (jeweler’s screwdriver)
• needlenose pliers
Opening the Computer
Warning: Always shut down your computer before opening it to avoid damaging its
internal components or causing injury. After you shut down the computer, the
internal components can be very hot. Let the computer cool down before
continuing.
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 and wait five minutes before continuing.
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.