High irritating beep

FlorisNielssen · Post by **FlorisNielssen** » Thu Sep 13, 2007 4:47 am

Allright, I've got a new Antec P150 for a couple of months with the following ingredients:
motherboard: Asus M2N
CPU: AMD Athlon X2 3800+
CPU-cooler: Arctic Cooling Alpine 7 (PWM)
GPU: passively cooled Asus EAX300 SE-X/TD
PSU: Antec NeoHE 430W (standard in the case)
512 MB memory of some kind
Simple (SATA) DVD-player
Samsung Spinpoint 320GB HD
And a Nexus 120mm in the back, 92mm in the front.

It's silent (:D) except for a high (irritating) beep. ~18000Hz or so and I don't know where it comes from.
I've disconnected the DVD-player, the HD, the Alpine, the Nexus'. No difference. The beep starts a couple of seconds after I've put the pc on.
Does anybody have any suggestions or ideas where it might come from?

Thanks!

crunchie · Post by **crunchie** » Thu Sep 13, 2007 6:24 am

do you have onboard graphics? or a different graphics card to try?
Often a capacitor can squeel a little. It may even be the motherboard itself.

Every asus mobo ive owned has squeeled

it would stop briefly when the pc is working hard or when you move the mouse etc.

I believe it occurs when it enters a low power state?

Hard disks tend to squeel when at full speed rotation as well but you say you have disconnected it.

protellect · Post by **protellect** » Thu Sep 13, 2007 7:26 am

Try a different power supply if you can?

FlorisNielssen · Post by **FlorisNielssen** » Thu Sep 13, 2007 11:04 am

I don't have onboard graphics. And not many spare graphic cards hanging around.
It doesn't stop when I run Prime95 (should get the pc working..). Not even when I start two.

Could be the motherboard.

Don't think it's the power supply, because it begins just a few seconds after I started the pc.

SevenFour · Post by **SevenFour** » Thu Sep 13, 2007 11:12 am

I have just built a Solo and after undervolting the fans I hear a (pretty silent) high pitched whine. In my case I am pretty sure it is the rear chassi fan blowing air on the output grill making the noise. I guess I will have to try and change the rpm of that fan to see if it makes any difference (S-flex E at 700rpm).

But if you have disconnected the Nexus that should not be your problem.

FlorisNielssen · Post by **FlorisNielssen** » Thu Sep 13, 2007 11:36 am

I'm beginning to think it indeed is a capacitor. <grr> Very little to do about that (intstead of replacing the whole motherboard or something. :S