Help please. Before my PC has an unfortunate accident with the pavement.

Tediore

Tediore

Tediore

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26 Jan 2011
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Right. Little help please :D

My PSU started making some funny noises a couple of weeks ago, and randomly shutting down the PC and not booting back up. I was ready to send it back when my motherboard died. That is currently awaiting replacement by MSI, so in the meantime I have borrowed a friend's old 775 CPU, motherboard and RAM... and I have the same problem... I'm getting odd noises from the PSU, then when I try to reboot, the fans try to spin, and then nothing happens. It will boot fine if I leave it for a bit though.

When I had my motherboard in, I tried another graphics card, and that didn't solve the problem. I tried my PSU in my brother's PC, and it ran OK after being left for a few days. I now have a pretty much new system in there - the only thing left from mine is the PSU and HDDs - and it's still doing it.

Would fans/HDDs cause a sudden loss of power which would result in the PC refusing to boot? I'm at a loss as to what to do here. Should I return the PSU?

Thanks :)
 
My PSU started making some funny noises a couple of weeks ago, and randomly shutting down the PC and not booting back up
Click to expand...

. I tried my PSU in my brother's PC, and it ran OK after being left for a few days
Click to expand...

the only thing left from mine is the PSU and HDDs - and it's still doing it.
Click to expand...


So you had your PSU go faulty.

You put your brothers in and it was fine.

You then got your PSU back in and its still doing it.


You have your answer.
 
I've never came across a PC failing to boot due to fans/HDDs. If it's a low voltage PSU it could be that the HDDs and fans are consuming too much power for the computer to stay on.

If I were you, I'd send the PSU back; what brand and voltage is it?
 
I thought it was the PSU from the beginning. My friend keeps insisting I consider absolutely every possibility, however, hence why I thought posting this here to get some clarification on it would be a good idea :)

The PSU is an Antec TruePower New 650w. This is actually the second one I've had; the first was DoA. After it shuts down, it tries to start up - there's a little movement from the fans - and then just refuses to power up.

It boots fine if I leave it for an hour or so after it shuts down, so I don't see how it could be the HDD or fans causing the problem... unless I'm missing something?
 
stulid said:
Ah, so the PSU is correctly recovering from a bad short/spike etc.
Click to expand...

Is that likely something within the PSU itself failing then? The only components I haven't swapped out are the HDDs (I've tried running with one, and it makes no difference) and the fans.

I've been looking at the Corsair AX series. The 750 or 850. I like my modular PSUs :D
 
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