Screen shrieks!- monitor makes noises!

Hi,

this problem with my pc is driving me mad. :puzzle:

I am using a CTX monitor, 17". nvidi drivers for g card.

My monitor makes a reeally high pitched noise for ever!
(noise stays all the time, whateva i do!) :m:

I hate it!

ps. Is it a problem with the refresh rate?

Can you help!?

Sk8ing