Audio noise

[Badut]

I just built a new system:

Asus A7N8X-X motherboard
AthlonXP2500
DDR333 Kingston RAM
LG DVD ROM
WD 80Gb HDD

Everything appears to be working ok except for the sound. The speakers emit a high pitched noise when the system is powered on. The sound persists as long as no audio is being played. Once I start playing a DVD or an audio CD, the sound is crystal clear. If I pause or stop playing the media, the high pitched noise comes back. Anyone got an idea what's causing this and/or how I can fix it?

Thanks in advance.

 

[Harper]

Try moving the speaker cables away from the rest of your cables (eg. Monitor, Mouse, Keyboard, Power, etc)

I find that i get some static noise that seems to go with what is not my display, mouse movement or keyboard strokes.
However, as soon as I untangle the "cable farm" that is behind my PCs and make sure that there is some space between the speaker cables and everything else, i don't get the feed back.

I hope this works.

 

[Badut]

Thanks for your suggestion but unfortunately it didn't do the trick.
I moved all the cables around. I even opened the case and isolated the internal audio cables. Nothing changes.
Is there something else that could be causing this?

 

[jessegil]

noise?

Just in case.... Check your windows volume controls, record and play, and try muting or turning down the varous sources. Sometimes there's noise on something you don't use.