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I also have this set and have had several known problems ie moire patterning on PAL and NTSC and a hum both of which were rectified by an engineer, but since the hum was fixed I have been getting horizontal lines going up and down the screen and since last week when I turn the TV on or switch AV channels it is pot luck as to if I get any sound at all. The TV is going back to the engineers on Wednesday.
Its amazing how a good manufacturer like Panasonic can release such crap.
I know i,m a bit bitter but after having 3 32PG50,s and one engineer call out and then a 32PB50 and 7 engineer call outs and in the workshop twice you get like that.
As for your buzz other than the scan coils mine doesn't buzz.
Regards
Neil
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