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Model A1419 / EMC 2806 / Late 2014 or Mid 2015. 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (iMac17,1) All with Retina 5K displays

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Old PSU - LED #1 / New PSU - LED 1+2 but no video

Hi guys,

So with this 2015 27” iMac, we get no power except trickle (LED #1) with the old PSU.

Ordered another on iFixIt and now I get LED’s 1+2 and fan spin when I turn on the machine but NO chime and NO video.

Could we be looking at both a PSU and a logic board issue?

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Sadly, its looking like that ;-{

Sounds like your system got hit from a surge or lightning strike. Most likely it came through your Ports (USB, TB or Ethernet)

Do you have a good surge suppressor and are all of the systems peripherals plugged into the surge suppressor? Is your Ethernet hub cable router likewise on a surge suppressor?

If you can swing it, I do recommend a good UPS.

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Thanks for the reply. This is for a client . I'll let him know. I thought something similar since it's pretty rare for more than 1 component to be affected like this. Not often I see this sort of thing but we've been having power outages/issues in the area too

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