Good suggestion, if the symptoms follow the VCR Tuner then you know it is
signal related (CATV Source). However if the VCR Tuner receives the material
and passes it into the TV via the Audio/Video inputs on the back of the set,
without the symptoms, then you can be assured you probably have a tuner
related problem in the TV.

"BWL" wrote in message
...
Just by the description, going by your not having problems with DVD input,
I'd
say the problem is in the tuner, or one of the voltages going to it is
intermittant. If you have a VCR, you could use it for the tuner going in
via
the video input. Free fix.