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A1418 / EMC 3069 / 2017 / Processeur quadricoeur i5 à 3,0 GHz, quadricoeur i5 à 3,4 GHz ou quadricoeur i7 de 3,6GHz. Sorti le 8 Juin 2017.

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Will not power up after usb cord in rear port landed on a 110 outlet

Call it bad luck i guess. When dusting my office desk i slid the imac and the lightning cable that is plugged into the rear ports landed on a 110 outlet where another device was plugged in. The device was not plugged in all the way and the end of the lighting cable landed righ on those pins. There was a spark at the 110 plug and the breaker kicked. The usb cord only had a bad spot where it made contact. Outside of that it was fine. I have tried powering back up my imac but there is nothing. My question is do you think it killed the logic board? Power supply? I assumed logic board since the usb ports are connected to it. The logic boards for my model are almost as much as a new machine. Any advice?

Update (01/31/2020)

I took the screen off and am only getting one green LED. Just as suspected PS is fine. Logic boards for my model when i can find them are almost as muc has a new computer. I am leaning towards a used IMac, one just like mine. They are in the 650 range. Any ideas?

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Long shot, but have you checked the fuse in the iMac mains plug?

par

No i didnt know it had one. Looking right now.

par

The fuse you are referring to is internal correct?

par

In the mains plug that goes into the socket.

If you've got another power cable try that, any kettle lead should work too.

par

I can not see any type fuse on the apple power cord. The male end is like any other 110 plug and the female end is a sealed unit and i dont see how there would be room in there for a fuse.

par

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Solution retenue

You’ll need to open it and observe the Diagnostic LEDs on the logic board.

This guide will get you there.:

Changement carte mère iMac Intel 21,5" écran Retina 4K (2017)

Meanwhile try plugging it into another wall outlet than the one you are currently using.

Also try resetting the PRAM by holding down the p, r, option and command keys on start up and see if you can get it to give you a POST tone.

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I took the screen off and am only getting one green LED. Just as suspected PS is fine. Logic boards for my model when i can find them are almost as muc has a new computer. I am leaning towards a used IMac, one just like mine. They are in the 650 range. Any ideas?

par

All the #1 LED tells you is that the power supply is receiving power, not that it is working. The PSU is the the #1 suspect.

par

Oh ok. So how can i test the psu? The fan does turn but acts strange.

par

You replace it and see if it solves the issue.

par

Ok will do.

Thank you for your time i really appreciate it.

par

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Marc Rose sera éternellement reconnaissant.
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