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A2116 / 2019 / 3.6 GHz quad-core i3, 3.0 GHz 6-core i5, or 3.2 GHz 6-core i7 processor. Released March 19, 2019.

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Problem after change cpu ram and ssd


Unfortunately after changing out of the CPU, RAM and SSD my iMac does not restart any sign of life just a green LED on the motherboard,

I don’t really know what to do, I have everything back, I'm disappointed Do you have any idea what ​​the problem is?

For the moment I strongly advise not to make the change of the CPU and the RAM : /

Here’s the picture of the motherboard

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Did you try putting the original CPU in so see if the system is working?

Also what CPU and RAM (specs) did you put in and lastly did you put in a 2.5" SSD or something else?


no I have not tried with the original processor, I will do it in the afternoon, I put a processor 7700 i7 and 2x16go and 1to ssd crucial thank you for your answer


The system is expecting a Core i7 (I7-8700) Coffee Lake CPU as being the highest it can handle.

The systems BIOS (EFI) is limited to what Apple uses in the given series in this case iMac19,2 these.


thank you the problem comes from the processor, I put the old processor and everything works. thank you for helping me understand my mistake, so if I understand you advise me to put the i7 8700k? (sorry for my pitiful English I'm french ..)


Le problème était heureux d’entendre le processeur que vous avez essayé d’utiliser.

Oui, vous devez utiliser l'un des processeurs de cette série. Cliquez sur le lien URL bleu que j'ai posté pour voir les différents modes de cette série.

Le meilleur processeur que vous puissiez utiliser est le 8700 et non le 8700k, qui est toujours une puce différente!

Happy to hear the CPU you tried to use was the issue.

Yes you need to use one of the CPU's this series used. Click on the Blue URL link I posted to see the different modes in this series.

The best CPU you can use is the 8700 not the 8700k which is still a different chip!


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Apple loves to lock out hardware options. What they list on the site as the “highest available” will literally be “the highest available”. For example, if it detects a CPU (8700K) that isn’t within the BIOS (8700 and Below) then it won’t boot.

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ok thank you for your help today I send the processor to buy the 8700 thank you very much for your help :)


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Ted L will be eternally grateful.
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