iMac Turns On and Off After Pressing Power Button

iMac Turns On and Off After Pressing Power Button

Video 1.1 Shows the power supply of the iMac A1418/A1419.

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First, ensure that the iMac LED 1 Power supply is in. Then, press the power button and see whether it goes to LED 2. If the iMac turns on and then off again after 1 second, this means that the issue is the CPU in the motherboard is faulty for your iMac A1418/A1419. To solve this issue, you will need to repair the CPU, or replace the motherboard.

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