[zenith2134]

I cleaned all controls today, and the switch is flawless as are all controls. The color is excellent, but now I have a blooming problem, (which was always the case just very minor, at commercials, etc.) I really think is related to the power supply. From a cold start, the pic comes up, then reduces to about 2" both horiz and vert (HV supply coming down) and the video goes negative (white) If I lower the PICTURE control, everything is normal, I just have to let it back up slowly. I had an '81 zenith console that did this but I junked it because of a weak tube.
Now my question - Is this problem related to aged electrolytic capacitors? If anyone can narrow it down I would appreciate it. Thanks again