2019 iMac. Diagnostic LED 2 = on, LED 1 = off?! : r/applehelp
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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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SOLVED: Where are the diagnostic LEDs on the iMac mid-2011 27" EMC 2429? - iMac mid-2011 27" EMC 2429 (2.7GHz i5) - iFixit
SOLVED: iMac won`t power on. Power button pressed = LED # 2 lights up briefly - iMac Intel 27" Retina 5k Display - iFixit
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SOLVED: Where are the diagnostic led's on this model's logic board - iMac Intel 21.5" EMC 2389 - iFixit
SOLVED: What are the 5 diagnostic LEDs? - iMac Intel 21.5" Retina 4K Display (2017) - iFixit
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