27inch iMac (late 2013) Diagnostic LED 1 flickers then off, already tried a new psu(AliExpress). Any ideas? do I try logic board next? : r/LukeMianiYouTube
2013 imac 21.5” power issue, replaced power supply twice, still no diagnostic LED on. The Mac will power on after being plugged in for several hours. And then powers on like nothing
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How to find and read the Diagnostic LEDs - iFixit Repair Guide
How to find and read the Diagnostic LEDs - iFixit Repair Guide
