SOLVED: Won't Boot: How to diagnose if Logic board or PSU at fault? - iMac Intel 21.5" EMC 2428 - iFixit
SOLVED: Where are the diagnostic led's on this model's logic board - iMac Intel 21.5" EMC 2389 - iFixit
SOLVED: Won't Boot: How to diagnose if Logic board or PSU at fault? - iMac Intel 21.5" EMC 2428 - iFixit
![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 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](https://external-preview.redd.it/4tt6KHT9hsHU1ho3P8L-U_S-w1dgSofjltsD__931os.png?format=pjpg&auto=webp&s=979b20d0b8563d1729d82cdfd54305f9dde6ecf3)