Page 1 of white noise

hi, I`m not really technical so you guys will have to bear with my, I have an LG DV-3500 I think, anyway it`s a home cinema kit, i get white noise from the centre speaker and the two rear speakers, the sound comes through these speakers nicely but it`s just annoying to have to listen to the white noise. When I first got the setup I was told by the manual not to place it near my tv set could this be the problem? where else would I put it?!

Ta
<OB>

What exactly do you mean by "white noise"?

a constant hissing.

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