Apple 24-inch mid 2007 manual Replacing the AC/DC Power Supply

Replacing 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.

1.Replacement Note: iMac (24-inch Mid 2007) power supplies are interchangeable.

Apple has determined that the 240W power supply (661-4422) and the 250W power supply (661-4478) for the iMac (24-inch Mid 2007) computer are interchangeable. As such, the 240W power supply (661-4422) will be substituted with the 250W power supply (661-4478).

2.A pressure wall (shown below) ships with each version of the power supply. It is very important that you install the pressure wall sent with the replacement power supply.

iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC  114