iMac G5 (20-inch iSight) Take Apart —Power Supply, AC/DC 81
Removing the AC/DC Power Supply WARNING: The AC/DC power supply PCB remains powered up whenever the system is
plugged in, whether or not the system has been turned on. Use extreme caution when
troubleshooting the system with the front bezel removed.
Don’t work alone. In the event of an electrical shock it is important to have another •
individual present who can provide assistance.
Keep one hand in your pocket when working on any iMac G5 (iSight) system that is •
plugged in. This will help ensure that your body does not provide a path to ground in
the event that you accidentally make contact with the line voltage.
Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a •
risk if they accidentally make contact with the power supply circuitry.
Using a torx screwdriver, remove the three self-tapping screws from the top and bottom left 1.
corners of the DC-DC board. Then remove the machine screw from the bottom right corner
of the board. Replacement Note: Install the machine screw (bottom right) rst when
installing the replacement board.