Annoying buzzing from Samsung Plano

Hi all. Was wondering if anyone could help me? I just bought a new Samsung Plano WS28A116TG from Currys (yeah, I know) for the spare room. Having assembled it I have noticed that there is a loud buzzing sound coming from the speakers whenever I choose a channel, play a DVD etc. The noise stops when the sound is turned right off and when there is no signal to the TV.

Does anyone know any ways to potentially fix this problem or is it a case for an engineer?

Any help much appreciated,

Cheers,


Jon