iMac Intel 21.5" EMC 2428 電源更換

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The next few steps bring your hands close to the exposed face of the power supply. To avoid a high voltage shock from the many large capacitors attached to the board, do not touch the face of the power supply.
Remove the following four screws securing the power supply to the outer case:
One 9.3 mm T10 coarse-threaded screw
One 25 mm T10 coarse-threaded screw
Two 22 mm T10 fine-threaded screws

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