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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
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mid 2011 27" won't power up and only 1 diagnostic LED | MacRumors Forums
Helping a friend fix up his mid 2011 iMac 27 inch, it seems to have a few problems : r/mac
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OWC 2.0TB HDD Upgrade Kit for All 2011 iMac Models
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SOLVED: iMac wont start, only diagnostic led 1 on - iMac Intel 27" EMC 2309 and 2374 - iFixit
iMac No power hardware troubleshooting using Diagnostic LEDs - YouTube
What to do when your iMac won't turn on?
What to do when your iMac won't turn on?
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How to find and read the Diagnostic LEDs - iFixit Repair Guide
2012 MAC PRO help with LED diagnostic - 3.4GHz quad core (base model) | MacRumors Forums
