Solved Sudden Shutdown - Wierd whining noise.

March 23, 2013 at 14:00:57
Specs: Windows 7
Dear Computing forum, i have a serious issue with my computer, and i was hoping that you might be able to assist me.

My computer shuts down, out of the blue. No error warning, no anything. It goes straight to black screen. This usually happens when i play something graphic intense. I have noticed that when i run something that requires a lot of work from my computer, there is this wierd, high pitched sound, coming from the tower. I've throughly cleaned everything, because i assumed it was a heating problem - I even checked all my temps and everything, and tried running my computer through an intense furmark session with no apparent trouble, while constantly checking temps - No issue there. But as soon as i play anything remotely requiring of my computer, it shuts down - If i forexample play tomb raider, or xcom the time before shutdown is very short, but if i forexample play Dota 2 (a much less requiring game) it might take up to an hour or 30 minutes before shutdown. The more intense, the higher the whining, often indicating a shutdown. I tried to unplug RAM, and my GPU from power, but the whining still persist, on a slightly lower level. This makes me assume that there is a serious Hardware problem.. I just cannot for the life of me, figure out what the problem is.

Any Help would be greatly Appreciated!

My specs (simplified)

Mainboard: M4N78 SE (Asus)

Processor: AMD Phenom 4x 9950 Quad-core processor(Black edition)

GPU: Nvidia Geforce GTS 450

PSU: NorthQ 4775-400bu2 Ultra silent (400w)

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March 23, 2013 at 14:31:52
Sounds like a bad capacitor somewhere. Look around on your mainboard for bad caps. There could also be bad caps in you power supply, put your ear right to the back of the power supply and see if the sound is coming from there.

This is what you are looking for.

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March 23, 2013 at 14:36:49
Thank you for the very quick response! I appreciate that. I checked the motherboard for blown caps, but could not find any. Im not really that tech-savvy so im a bit in doubt when i ask this question, but it is what worries me the most: Could this, in any way be connected to my Central processor? Because after all, a power-supply, would be very much cheaper to replace, compared to the CPU :)

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March 23, 2013 at 14:48:03
✔ Best Answer
No, CPUs rarely fail. The only things that make a high pitch whining sound are caps, coils, and transistors. Your fist step would be to power up only your power supply. So disconnect the power supply from your mainboard and jump the green wire on to ground using a paperclip. If you can still hear the whining sound then replace your power supply.

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Related Solutions

March 23, 2013 at 14:56:23
So either it's the PSU or the motherboard. Right. I will bravely attempt to power up the PSU without killing myself in the process. If it turns out that it is not the PSU i suppose a replacement of the Motherboard is in order.. It is an old setup anyhow. Thank you for the advice, much appreciated!

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March 24, 2013 at 04:30:47
Hey Gretti, i tried powering up my powersupply by itself, using the paperclip trick. It did not whine on its own. i Then tried plugging it into the motherboard itself (the 24 pin connector) Still no Whine. However, when i plug in the ATX12V 4 pin Connector to the motherboard, the whine starts. So the question is: Is it the motherboard, or the power supply that causes the problem?

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March 24, 2013 at 14:10:02
Could be noisy fan bearing too (some can be lubricated by removing the end sticker).

HD is another possibility (but usually you get problems with the computer too) - some examples here:

You have to try to find out where the sound is coming from but the fans blowing can move the sound around and confuse the issue. This might seem crazy but sometimes a thin piece of wood can help - one end on your ear, the other end on suspected components.

Always pop back and let us know the outcome - thanks

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March 24, 2013 at 14:39:53
Thanks you for all the replies fellows. I tried exchanging my PSU with another one from a friend... That seemed to fix the problem, atleast the computer does not shut down right away as before. I suppose the best idea would be to replace my PSU. Thank you again

Regards, Kenix.

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March 24, 2013 at 14:58:58
It may need a load on the 4 pin to give you a whining sound. But it sounds like you got it figured out.

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