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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What to do when your iMac won't turn on?
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Intel iMac 27" Power Supply
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Amazon.com: Odyson - Power Supply (310W) Replacement for iMac 27" A1312 ( Late 2009-Mid 2011) : Electronics
Amazon.com: Odyson - Power Supply (300W) Replacement for iMac 27" A1419 ( Late 2012-Mid 2017) : Electronics
How to test iMac power supply - YouTube
iMac 27 inch A1419 power supply ADP-300AF T - Macparts
