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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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Teardown my iMac 5k late 2015, now won't boot please help

Hi everbody

Today i decided to install an SSD (from apple) on the PCI port of my 27" iMac 5K late 2015

OK, followed the teardown, made sure I did nothing wrong on everything, I rebuilt but now when I try to boot ---> nothing

The LED of the motherboard ---> Nothing, all the LED are off

First thing I tried was to remove the SDD it remained the same, so this is not the SSD.

Next I tried the power supply ---> The big box for power in the iMac ---> I put it in other iMac 27 2012 ----> the power supply is working !!!

So guys, my iMac won't boot and the LEDs are off (the number 1 too)! I tried many times everything, what is going on with it

it is my mother board ??? I did nothing on it, I was soft and everything...

Maybe there is a security on this model, maybe I have to push a button to unlock a security ???

Please help me !

The iMac was running fine, now the green LED is not even on!

If LED #1 is telling me if the motherboard getting power from power supply why the led is off on my late 2015 if my power supply is working on other iMac 27 (late 2012) maybe cables on the power supply?

Answer this question I have this problem too

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Sounds like you have a damaged logic board somehow.

You talk about using an Apple SSD. Where did you get it? It could have been the wrong type which could have damaged things.

At this point I think you'll need to throw the towel in and put things back together so you can bring it into an Apple authorized service center or better yet an Apple Store. See if you can sneak it under a warranty repair or you'll need to pay the bench fee.

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11 Comments:

there is no warrantly, i opened the imac

so this is for my pocket !

that's why i ask here !

the ssd is from a macbook pro 2013 , it is the right to use, it fit perfectly

i was very careful with the logic board %#*@ !

why the LED is not on ???? i tested the power supply on other imac, it works !!!!

so why the LED is off ?

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Did you use proper ESD practices? Did you damage one of the cables?

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what is ESD practices ?

no cables damaged....

only one screw broken , the one of the logic board

iMac Intel 27" Retina 5K Display Logic Board Replacement

step 50 , One 20.8 mm T25 spacer screw

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Here's a good reference: Electrostatic discharge and here is what you should have when you pull a logic board: The Prevention and Control of Electrostatic Discharge (ESD). This is more important in the winter when the air is dry.

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You speak of damaging one of the screws. Can you explain and did you put it or a replacement in.

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Fanny Augier will be eternally grateful.
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