[Pc_Support] Intermittent, high-pitched noise from PC

[Patrick]

On Wednesday 25 May 2005 09:42 pm, Justin M. Keyes wrote:
> hi guys,
>
> I'm getting a randomly-occuring, high-pitched "eeeeee" noise from my
> box. From several weeks of observation, it seems to occur under load.
>
> >From watching gkrellm, sometimes it occurs on high CPU usage,
>
> sometimes HDD usage--so it seems I can rule both of them out as the
> origin. This thread[1] suggests that such a sound may be caused by a
> motherboard part. Is that really possible/probable?
>
> Another interesting thing is that the sound occurs quite frequently
> within the first hour of cold-booting the computer. However, leaving
> the computer on for weeks doesn't completely eliminate occurences of
> the sound; they still occur almost daily.
>
> I guess it must be the PSU. Is this a sign of a dying PSU? Is this a
> sign of brownouts? Chad Perrin says that power fluctuations can harm a
> PSU, motherboard, CPU, and even a hard drive.
>
> Is an oscillating coil, as mentioned in the link[1], a harmless thing?
> Is this the same thing that causes cathode-ray tubes to make a
> high-pitched noise?
>
> I'm just fishing for comments, similar experiences, or knowledge of
> the possible causes and ramifications.
>
> Thanks!
>
> [1] http://forums.pcper.com/showthread.php?t=380488
Are you absolutely sure that the fan isn't going dry?  I lube the fans, with 
some CRC about once a year... you could try using a spare PSU... that would 
isolate the sound to be in the PSU, or not!

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