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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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Can I up grade the logic board on a 27" 2015 iMac?

I recently purchases and installed a new power supply for my 2015 iMac (27”) with great success. However, the computer is still shutting down randomly. The model number for this iMac is EMC 2834 and I don’t see any available. Is it possible to put a newer model logic board in the 2015 iMac. Thanks!

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This question was migrated from https://meta.ifixit.com/Answers.

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@cthrnolive - While iFixit is out of stock you might be able to locate one from another source.

Where are you located so we can try to aim you to someone local.

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Thank you. I'm in St. Paul, Minnesota.

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@cthrnolive - Here’s the needed part late 2015 27” logic boards You have a choice of six all will work in your system.

Here’s the guide to put it in iMac Intel 27" Retina 5K Display Logic Board Replacement

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Thanks, Dan!

After install of the new power supply I hooked everything back up and it almost immediately randomly shut down again. I decided to try a few more diagnostic tests and now it’s been running fine for a few days. I know this random shut down is a common problem with these iMacs based on discussion boards. Any advice on whether I should wait to go ahead with new logic board or wait and see if the problem of random shutdowns/restarts continues?

I’m asking just because I’ve read some posts about how difficult it is to replace the logic board and problems that can occur after. I had ZERO problems with the power supply, but perhaps it was beginner’s luck.

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@cthrnolive - Normally I would recommend first trying to fix the logic board as often its a failing $1.00 or less compoent. But Just like landing in Paris without a map getting around doit speaking/reading the language or even a simple compass will get you nowhere!

Replacing the board is about the best you will likely have. Not as painful as you describe, it is not the cheapest solution either. There are people out there that do board level repair. I'll admit finding a skilled person is tough.

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