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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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SOLVED: Where are the diagnostic LEDs on the iMac mid-2011 27" EMC 2429? - iMac mid-2011 27" EMC 2429 (2.7GHz i5) - iFixit
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Apple iMac A1311 EMC2308 Motherboard/Logic Board w/ Integrated VGA #8520Z19/17S | eBay
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iMac 27" A1419 Late 2012 Logic Board Nvidia GTX 660M 512mb 820-3298-A NO CPU 82032000098 | eBay
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SOLVED: Where are the diagnostic LEDs on the iMac mid-2011 27" EMC 2429? - iMac mid-2011 27" EMC 2429 (2.7GHz i5) - iFixit
iMac No power hardware troubleshooting using Diagnostic LEDs - YouTube
Diagnostic LEDs - Apple iMac 24 inch - Mac Specialist
