1978 Sylvania console problems

[sampson159]

looks more like a horizontal oscillator problem.the first module is known for cold solder joints around the if ground plate.its in the center of the module.the 3rd module is horizontal/vertical.also been known to have cold joints.is this the original black matrix crt?they make a pretty picture when they are good.didnt last long,usually about 3-4 years but still the best picture.a flat chassis zenith with this crt would be the ultimate set!good luck with this set.