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PSU fan making a loud whirring noise

post #1 of 10
Thread Starter 
The PSU is a Casecom ATX-500W (yes, it's so bad it will cause nuclear war, I know... But I CANNOT afford a new PSU.)

I had the machine (my HTPC, S754 Athlon, FX5600) on for about 10 minutes, and suddenly it makes this loud whirring noise. Never heard it before on this system, had it on for about 4-5 hours at a time in the past, usually silent as anything.

I powered it off because I was terrified it was broken. Powered back on, and before "Starting Windows" appeared, it made the noise again. The ATX-500W has 2 fans, one at the rear and one at the front (outside the actual PSU casing, inside the PC case). I don't know which one it is, but it is not any other fan in my system making that noise (the only other fan in my system is my CPU fan, which is fine)

Is there anything I can do? I know it's not a reputable PSU, but its all I have, and I have not got any money to put towards a new PSU right now...
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post #2 of 10
I've got a rosewill 500w, it's about a year old. It's starting to make a very slight grinding noise - fan wear. I can only assume your fan is dying. Try putting in a new fan, see what that does for it. It's not like anything IN the ps is making a noise as there's no moving parts.
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post #3 of 10
Stop the fan with a pencil, see if the whirring goes away.
post #4 of 10
Thread Starter 
Quote:
Originally Posted by Phaedrus2129;12090124 
Stop the fan with a pencil, see if the whirring goes away.

I can just about do that with the inside fan. But the outside one, it's difficult to get behind the fan guard. Will try it this weekend, really don't want to be sticking a pencil into a live PSU, but never mind.

Sidenote: Hiper Type M PSUs - Any good? Might have found one in a spares box.
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post #5 of 10
Quote:
Originally Posted by Markeh;12090232 
I can just about do that with the inside fan. But the outside one, it's difficult to get behind the fan guard. Will try it this weekend, really don't want to be sticking a pencil into a live PSU, but never mind.

Use the tip, not the eraser end. It's non conductive, so no danger.
post #6 of 10
Thread Starter 
It's the rear fan, inside the actual PC case but on the exterior of the PSU casing. It's an 80mm fan. It keeps varying in noise. By the time it starts to go quieter, it suddenly gets a hell of a lot louder. and then carries on.

I have a spare 80mm fan, could I attempt to replace the PSU fan with this? The holes line up as far as I can see, and the fan I have spare is an Akasa AK-182-L2B
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post #7 of 10
Generally the fans inside a PSU are soldered directly to one of the circuit boards. If they're not they used connectors different than your standard 3-pin or molex. At least the few PSUs I've cracked open were this way.

If you can make all the right connections there is no reason why you couldn't replace the fan...
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post #8 of 10
Thread Starter 
In that case, i wouldn't want to waste the Akasa. 80mm fans are pretty cheap nowadays, so I might pick one up, and probably wire it in.

I mean, it's got another 80mm fan inside the unit. Would it manage with just one?
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post #9 of 10
I'd just pitch it since it's probably a piece of crap ATX 1.3 era unit hastily adapted to ATX12V by adding the 4-pin mobo cable and putting "P4" on the label.


Yeah you say you can't afford it, but can you afford a new PC if that unit goes to crap?
post #10 of 10
Thread Starter 
To be quite honest, all the parts were freebies.

I wouldn't use it if I had an alternative. But the only other alternative is a 10 year old Q-TEC 300W, not enough to power it, I don't think.

And it appears the unit's been going strong for a few years.

If I had the money for a PSU, I'd buy one. But I don't.
Edited by Markeh - 1/21/11 at 2:41pm
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