[julianburke]

One of the biggest problems I had fixing these sets years ago with color problems like that was coils opening up. Most were easy fixes as you would open up the can and pull out the coil and re-solder the terminals on it. Check the voltages on the plate of the adjacent 6GH8's or other tube in the color circuit. The fact that they are getting older doesn't help as they developed these kinds of problems 50 years ago.