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High pitch noise from psu

Last response: in Motherboards
May 17, 2011 7:46:41 PM

Hello. I bought a new as rock motherboard to replace my old as rock mobo. As soon as I plug my psu into the mobo I get a high pitched noise from the psu. Have not tried to turn on pc due to me being scared of frying something. When the psu is not plugged into anything (only the wall) no sound is made so I don't think the psu is broke as it was working the other day and is only a couple months old. Help!

More about : high pitch noise psu

May 17, 2011 8:00:16 PM

How loud is it?
Triple check everything is plugged in right.
May 17, 2011 8:01:50 PM

Noticeable but not very lound. It even makes the sound when only the 24pin connnector is in the mobo with everything else disconnected
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May 17, 2011 8:12:00 PM

How noticeable? This happened to me with one PSU, but it worked fin... strange that 1 month later I had to RMA it.....
Do you have the PC plugged into a power strip?
May 17, 2011 8:12:37 PM

What brand is the PSU?
May 17, 2011 8:46:26 PM

CIT 750 W gold edition. 3 months old. Can't be heard from 5m away. Close up very annoying
May 18, 2011 10:48:54 AM

Also. When plugged into my old mobo tis sound cannot be heard
May 18, 2011 2:49:57 PM

Check for any bad caps and what is the PSU plugged into (power strip, UPS, etc)?