Ultra high pitched noice coming from computer

Posted by user11177 on Super User See other posts from Super User or by user11177
Published on 2012-11-23T03:27:43Z Indexed on 2012/11/23 5:01 UTC
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desktop-computer

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noise

It happened twice today, first a few minutes after turning on the computer (stopped by itself after a few minutes), then several hours later after I had turned my computer off, it started emitting a faint, ultra high pitched noise.

The noise is not very loud, and almost to high pitch to be audible, but definitely noticeable for my ears.

I sleep in the same room as my computer, so at first I was confused when I had just turned it off and started hearing the noise, so I went out of the room to check if the noise was in my head, but no it was definitely coming from the comp. It stopped when I turned it back on.

What can be the possible causes for this phenomenon?

How can I fix it?

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