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What could cause this?

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08-08-2017, 08:39 PM

old_tv_nut old_tv_nut is offline

See yourself on Color TV!

Join Date: Jul 2004

Location: Rancho Sahuarita

Posts: 7,777

It seems to be at a somewhat regular rate, like power supply motorboating or some similar oscillation in the beam controls. I'm guessing there's still a bad cap (or cap connection) or two somewhere.

EDIT: poking around the video supply with a scope or a fast-acting DC meter may lead to the problem.

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