Bought 42" Panny (4-Series) about six months ago. Really impressed - apart from buzzing. Got Panasonic to pick it up to test - they sent it back saying it was "normal". I'm still not convinced - I can hear a definite noise from the bottom right hand side of the back-panel. It can still be heard when listening to normal level programs. Anyone any ideas as to what I can do? The dealer I bought from (Plasma-screen.co.uk) has basically said that if Panasonic say there's no problem, he isn't going to do anything. I have listened to other screens in shops and that of a friend - they are all a lot quieter than mine. Are there any independant engineers that could test whether the screen is OK? (I live in Livingston, Nr Edinburgh). ANY ADVICE WOULD BE WELCOME.