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High pitched noise coming from inside PC

C

CannonDub

Limp Gawd
Joined
Feb 1, 2009
Messages
418
Today I am over at a friend's place trying to help him solve a PC issue. His specs are listed below post. For as long as he can recall, the PC makes a high pitched sound, almost like a whistle or high pitched sqeal, constantly and it gets even louder when the PC hibernates.

My first guess was it was an issue with the PSU so I advised him to get another one. He put the new PSU in yesterday and the sound persisted. Today I came over and went through all the standard trouble shooting moves. Essentially, everything was removed from the computer and put back in. I even applied fresh thermal paste to the CPU. I tried a different CPU fan/heatsink, a different video card, a different PSU, and different RAM. The only thing I didn't have another of to test was another CPU.

Things we know it is not:
PSU
Video Card
HDDs
RAM
CPU Heatsink/fan

What could be the issue here? The internet has been unhelpful in terms of trying to google a solution. If it is a motherboard issue, what is the issue and is it something that can be fixed? I don't want to be like "just buy a new motherboard and try it man" without exhausting all possibilities.

Any suggestions?

System:
Gigabyte M61P-S3 AM2 Motherboard
AMD Athlon 64x2 3800+ AM2
Antec Earthwatts EA-500D 500W PSU (new)
Corsair DDR2 667MHz RAM 4GB
 
Sounds like capacitor whine from the motherboard. The voltage regulators in particular.
 
It may be the issue. Try to isolate the sound's source. If its coming from the CPU area, then it's the voltage regulator capacitors. Also, visually inspect the capacitors. If they look swollen or have some gunk on them then it's definitely that.
 
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