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#28773 11-Dec-2008 11:56
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Um, I was wondering if someone could help me figure out what my computer's doing...  Sometimes when I'm using the computer, I suddenly hear a continuous, high pitch noise coming from my computer.  I don't know what part of it it's coming from (could be power supply or fan...I dunno).  All I know is that it goes away on its own after so long, or goes away when I shut the system down, and that it drives me insane in the meantime.

Anybody know what it could be?  I get uneasy leaving the computer on too long because of it.

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  #183487 11-Dec-2008 12:23
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a bit more info would be helpful, desktop or tower, lcd or crt monitor etc etc?


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  #183500 11-Dec-2008 13:13
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first thing, and probably the easiest, is to take the cover off the case while it's happening and see if you can then identify which part is causing the problem.  it may be something as simple as a cable touching the cpu fan while it's running, but taking the cover off should give you a better indication of where the problem is originating.

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  #183560 11-Dec-2008 16:12
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To me sounds as though the fan keeping the CPU is on it's way out.

Unplug your PC, take it outside, open the case up and using an air compressor blow all the dust out of the box.  Hopefully this will fix it, otherwise time for a new fan.

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