My TV generates an irritating buzzing sound when the ambilight is on. When the ambilight is turned off the sound disappear. The sound is especially distinctive when the TV speakers are muted, or when a surround receiver, connected with HDMI, is used (which of course also mute the TV-speakers). I have also tested the TV without any receiver, or any other external device connected. It does not make any difference, the sound is still there.

The buzzing is not very loud, but loud enough to be heard all across my living room (and beyond) if it's not drown out by another sound source. It is difficult to tell exactly where on the TV the sound emerges from, but I think it is from the front TV-speakers.

Does anyone know if this is a common problem with this model? Any other with the same problem?