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Modelo A1419 / Finales de 2013 / 3.2 y 3.4 GHz Procesador Core i5 o 3.5 GHz Core i7, ID iMac14,2

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iMac 27'' Power on problems

Hi, i have a 27'' iMac with a power supply problem (i think)

When i try to power on the iMac it nevers turns on but if i move the power cable sometimes it turns.

Sometimes when i dont use it and i try to turn on it power on without problems.

It will be a power supply problem? Logic board poblem?

What i can do to discard the problems?

I did the SMC Reset and it didn't work

Thanks!

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Bryan, did you ever find the answer? I have one about 4 months old that is doing the same thing. Apple told me they replaced the logic board and power cord, but it still has the same problem.

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You say when you move the power cable sometimes it works, are you sure its related to the iMac and not the power cable, if possible I would try another power cable first to test it doesn't really have to be an apple one any generic one would do for testing. let me know how you get on.

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I tried with 4 power cables and i have the same result one of them are original.

When i use the generic cables it turns on but of 10 attempts one works and turns on.

And sometimes when it turns on, loads the apple logo, it shutdown and i cant turn on again

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Have you tried a PRAM reset?

Shut down your machine. Yes, all the way down, not sleep or logging out.

Press the power button and then press command-option-p-r. You have to make sure you get those keys pressed before the gray screen comes up or it won’t work.

Hold those keys down until your Mac reboots again and you here the startup chime.

Let go of the keys and let your Mac reboot normally.

Link from: https://thenextweb.com/lifehacks/2017/06...

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@lewbar123 - When you can post to Apple's T/N's (or other device T/N's when its their issue)

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Not that it makes any difference but here is the Apple link too!

https://support.apple.com/en-gb/HT204063

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I tried to do the PRAM reset but the iMac dont turns on. I will keep trying because sometimes it power on.

When i get the result i post one reply here

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Bryan Formento estará eternamente agradecido.
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