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iMac G5, 17-inch Take Apart Power Supply
Replacing Power Supply 1. Remove the replacement power supply from its packaging.
Note:
If your computer
does not use an ambient light sensor, remove the ambient light sensor that is riveted
to the front of the power supply. Refer to “Important Things to Know” at the beginning
of this section.
2. Lower the power supply into the computer.
3. Connect the black power supply connector and tighten the three captive screws,
turning them to the right.