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iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 114
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.
Replacement Note1. : 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).
A pressure wall (shown below) ships with each version of the power supply. It is very 2.
important that you install the pressure wall sent with the replacement power supply.