Had this 2 days now, was very pleased with it all having applied the picture settings listed on the 36zp48 review thread. Problem I have now is a buzzing sound coming from the speakers. It comes on all channels, sky, dvd and video. If i turn the volume down to 0 it disappears but as soon as it's turned up to 1 or anyhting above it's back and V annoying!! Obviously with the volume turned up it's not as noticeable but I know it's there and it's obvious during silences. I've done a search, there only seemed to be one other thread on this which is fairly inconclusive, however, tvs humming/buzzing seems to be quite a common problem. Is there an easy solution to this or am I gonna have to get an engineer in?