writes:

it's panasonic color set, 15 years old. i have cable and watch the
cable channels thru my vcr.

my TV is prone to turning into snow a few minutes after I turn it on.
turning it off and on again solves it.

what gives? is this a tube problem or is it something else? thanks.

Tube problem? Even someone who knows nothing about how TVs work should
be able to figure out how impossible this would be.

It's probably a bad connection or marginal component.

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