Re: TFT Monitor Hissing noises
They can change the resollution because it may have not been inplemented on the chip to refuse that certain resolution. Screens have difficulty to handle it, so that hissing noise is the screen being "OCed"
On the other hand, hissing on the screen is not normal during those normal settings and operation. Although, if you put your ear close to the screen, you will hear a bit of noise, but that's fairly normal. Mine does it, but when it's time to hear it loud, it's not normal.