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Originally Posted by old_tv_nut
Time to do a process of elimination. Swap out the output cable(s) for another one(s) to check for bad shielding/grounds. Unplug other gear one by one to see if the interference goes away. (Don't just turn them off, as the power supplies may still be running in standby mode.)
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Just did this. Tried unplugging everything that wasn't the VCR, source, or TV. Lines remain.
Tried changing the cable. Lines remain.
Tried putting in an RF modulator instead of the VCR. Picture quality is awful, even by RF standards, but the lines are gone.
Quote:
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Look in the RF modulator for 1uf and .47uf electrolytic caps. They were notorious for failing and causing that.
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I'll give this a shot.