Annoying noise using baterry!!!

[rbvf]

I have an fs415m and every time the ac cable is unplugged and i stat to use the baterry, a noise starts!!!!! looks like its comming from somewhere near the power bottom. it´s funny because when i set brightness down the noise seems to get lower......

[Sebby]

it´s funny because when i set brightness down the noise seems to get lower......

You've answered your own question there (sort of): it's coming from the LCD.

Don't ask me why, but when the brightness is turned down, the screen buzzes. I get it on my FS215S too, and I know it's normal (i.e. not a fault).

[Thalamus.]

Hi rbvf,

Welcome to Club vaio,

The sound that you have described has been mentioned before, I searched the forum and found these two threads that may be of interest.

Here and here, unfortunately neither thread offers a solution.