My AN50R emits a high-frequency sound...

In the beginning the sound only appered all 5 oder 6 seconds. but now I have this all the time :/

but if, for example, i resize a window very fast the sound disappears for the time resizeing the window...

Someone said that it's the fault of the SATA controler? would an external controller help?

can i do anything against it?

thx

semtex

oh... yes... sorry for my bad english