Rca 21-t639

[bgadow]

If it was mine I would replace all the paper & electrolytic caps & put in a new horizontal output tube. Chances are very good that it will then work. You could skip some caps and just try the ones in the horizontal/HV circuit but my experience is that those caps you leave will come back to haunt you. The vertical section in particular will not work right with marginal or bad capacitors. As Blue Lateral said, having the crt tested would be a good idea. If it was very weak or bad you would then have to face locating a replacement. Not the end of the world but it might make this not worth the effort. Maybe you can borrow a tester from somebody? It wouldn't have to be a very fancy unit. I'll admit that if I was in your shoes I would get impatient and throw another output tube in there and see what happens, but that is not what you are supposed to do!