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PSU whine ... faulty motherboard?

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  • Motherboards
  • Power Supplies
  • Cases
  • Components
Last response: in Components
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November 20, 2013 7:09:11 AM

I was wondering if anyone has dealt with PSU whine on account of a motherboard. I built a cool computer using a Xeon LGA771 modified to run in a LGA775 motherboard.. but the motherboard couldn't accommodate the case's USB 3.0 20 pin connector, so I put it in another case, which I was able to modify to install a water cooler. When I plugged it in and switched on the PSU, it (the PSU) made a nasty sound. PC doesn't power up. I have gotten a "swelling" sound that lasts for about 4 sec, and I have gotten a constant high pitch. The bummer is that I tried 2 other PSUs with the same result. All three PSUs work in a different setup. The whine happens only when the power rail is plugged in. I also took out one stick of ram, then the second, unplugged everything else.. IDK. Any idea?? Seems like the motherboard is fried chicken, but I would love to know what I might have done to mess it up. I might have shocked it.. :(  Thank you for any help!

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a c 76 V Motherboard
a b ) Power supply
November 20, 2013 2:04:20 PM

There could be a loose standoff behind the motherboard causing a short?
What happens when you try it in your old case?
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November 23, 2013 11:08:13 AM

ganon11000 said:
There could be a loose standoff behind the motherboard causing a short?
What happens when you try it in your old case?


When I try it in my old case.. it works!! At least, at a most basic test. Thanks a lot, Ganon, sorry I slayed you a thousand times. ;) 

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