I have two Wharfdale TV's. One started to buzz and the sound went completely, now the other has started to buzz so I guess it is only a matter of time before the same problem occurs. Is this a fixable problem and are they worth repairing? The pictures etc are fine.
The first thing to do is try hooking up the external speaker that might work. Go into menu and make sure you audio is set to stereo.
The hum or buzz is usally caused by failing capacitors. If you take the back panel off, it will be on the board where the coaxel is, or cable connection is. (RCA cable hook up) Check this for swelled caps, if so then you will have to replace this board.