RCA KCS-47A Riddle

[7"estatdef]

What works fine then goes Zorch!!! and smells like burning rubber? My faithful 6T71 was working fine last night till it made a buzzing sound and the screen went dark. It also emitted an odor of burning rubber. Sound went dead but came back after a few seconds

About three years ago I when though it and replaced a bunch of resistors, all paper & electrolytic caps, + some bad micas. Set has been working just about every day since.

I got a chance to pull the chaiss out tonight. I was expecting to find something all burned up but I'm not seeing anything that looks bad. I remember Bill C mentioning something about the damper tube filament/cathode shorting and taking out the power transformer. HV fuse is good, maybe overrated as I don't think I could find that low current one when I was working on the set years ago.

Flyback resistance is about right as per the Sam's. Haven't had a chance to hook up the jumpers so I can fire it up outside of the cabinet.

Any thoughts?
Terry