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Anyway to diagnose a logic board without buying new PSU?

I'm in possession of an Intel iMac 2210 and it appears to have a dead power supply. For a little background, it went through some sort of power surge that rendered it useless. I've opened it up and looked at the diagnostic LEDs on the logic board and they don't seem to turn on at all. So either I'm looking at something totally wrong, or signs point to a faulty power supply.

But here's the thing, although I have no issue paying the $140 for a replacement power supply, I don't want to spend that money just to find out that it was actually the logic board that crapped out on me. So I was wondering if there was some way for me to test the logic board or something to greater guarantee that the power supply was the only culprit in this.

Alternatively, I was wondering if there was some way for me to connect pins from a PC to the iMac and see if it turns on that way?

If not, then would you happen to know if iFixit will take back the replacement PSU in the case that the logic board is in fact dead? I read that they take back parts as long as they work and give you a percentage of the money back, but how much would that percentage be?

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Check out my guide iMac Intel 20" EMC 2210 Power Supply Output Voltage Test

It may assist you

EDIT - Opps! Oldturkey beat me to it

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JanHenrik, check on here for a quick reference.

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Since you have to remove the PSU anyway you could take it out and test it before purchasing a new one. If you want to talk to someone from iFixit (this is the volunteer DIY help forum) contact iFixit direct.

If this Answer is helpful please remember to return and mark it Accepted.

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By testing you mean measuring the voltages, yes? Or is there some new exciting way I haven't heard of?

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Yes that's what I meant... See the link from oldturkey03 in the comment above

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If you look at the Psu look carefully you will probably see a burn mark somewhere.

I've had some machines some techs thought

it was Psu - they changed it - no change

Said it was a logic board.

So I take a look and find out the problem is not the Psu nor the logic board but the cables that go to the power supply from the connector.

Sometimes you can even smell where the issue is lol

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I don't see any burn marks anywhere.

That's an interesting idea though. I guess that would require removing the logic board entirely, though. I guess I have nothing to lose though. Except maybe a few hours, haha.

In your experience, would I be able to tell visually if the cables are okay, or would I have to go through some funky tests with the multimeter? Thanks.

von

you don't need to take out the whole logic board. you can test it if you have a multimeter basically check for continuity from the plug (behind the imac - you want to test the ones that are parallel to eachother not the one on top of the triangle)

Basically trace this to the power supply there's 2 wires that should lead to it (the parallel ones behind the imac)

The imac that I had with the damaged cables - the cables looked good from the outside but checked for continuity and no good. Took it apart completely and those cables had been so badly damaged like literally the copper had melted. so yeah check for continuity and if no good then you know where the problem is. If you need more help you can e-mail me at info@yolorepair.ca

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JanHenrik wird auf ewig dankbar sein.
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