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모델 A1419 / EMC 2806 / Late 2014 또는 Mid 2015. 3.3 또는 3.5 GHz Core i5 또는 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 또는 3.5 GHz Core i5 또는 4.0 GHz Core i7 (iMac17,1) 모두 Retina 5K 화면 장착

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A1419 No Diagonostic LED after NVME SSD replacement

Hello,

Recently I replaced the NVME SSD in A1419 iMac.

Unfortunately, it did not turning on after doing that. I replaced the new PSU, but the same situation. It seems PSU is OK.

AC-DC connector, J600 #4~6, #10~12 are 12V. But 4 diagonostic LEDs in logic board are not turning on.

What shall I do check for the first time?

I want to repair by myself… but not board view file for this model. Please let me know the solution and share the borad view file, if you have.

Thank you!

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I would remove the drive you put in it’s likely bad or shorted out.

Carefully plug things back together without the drive and any adapter does the system boot up now?

If it does then you need to replace the drive elements. I would recommend going with a better drive like OWC Aura Pro X2 SSD

Replace or upgrade the PCIe solid-state drive in a variety of Macs. 이미지

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OWC Aura Pro X2 SSD

$199.99

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Thanks, DAN!

I removed the SSD, and the same result.

SSD was used in A1502 MBP...

It seems logic board issue, I guess...

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@hongabee - You do need to be careful on what you plug in! Take the time to review this great guide The Ultimate Guide to Apple’s Proprietary SSDs Apple has used a few different SSD interfaces so you got to be careful to install the correct one. Make sure the SSD you used is the correct one for your iMac

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