Cable hookup - direct from Time Warner. No boxes in the path. The TV works normally for a while - 5 minutes or several hours, then the sound goes buzzy loud and the picture goes to zigzags & snow. On all channels. It seems like an overload. The video input works just fine, fed from a VCR even when the antenna/cable input is blitzed. So I can always use the video input. I tried decreasing the signal strength (working on the overloaded input hypothesis) by inserting a couple of splitters, which should have reduced the signal by about 10 db. This did not work. Picture quality is just fine when it is working on any channel or on video. No other problems. If I wait a while, then it works fine again for an indeterminate time, before failing again.
Definitley seems like a loose connection or a cold solder.
The set has loose power conections to the tuner and judging by the model it might have other loose conections in the chassis,the loose conections need to be resoldered and might not be easy to find,try taping the side of the set to see if it reacts while is doing the problem.Be safe and call a technician unless you are familiar with tv service.
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I like the possibility of a bad connection in the tuner and will see if the problem responds to impact. We just moved about 250 miles and the set (in original box) travelled about 400 miles getting here. Thanks.
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