Late 1960s zenith color console question

[radotvguy]

Hopefully someone can give me a me a little help .

I have a late 1960s zenith color console , which is a sams no #982 . 25 INCH RECTANGULAR . Anyhow i replaced a few electrolytics in this set which brought my picture and sound back . Then i had a problem with the picture was too snowy . So after cleaning the tuner and replacing tuner and IF tubes i seem to correct that problem . I had the set running for 30 mins or so yesterday and the horizontal starting acting up and would not hold . So i shut off the set, let it cool , then pulled the horizontal oss tube out which was a 6BA11, replaced it with a new one , then firied the set back up and got no picture at all , but also noticed the horizontal output tube was cherry red hot and brighter then normal . I shut it and thought maybe i did something but couldnt figure out what , so i put old 6ba11 tube back in and firied it up again , same issue , no picture , no high voltage and cherry red horizontal output tube . I am no expert but i think the flyback might be bad which is what is causing the horizontal output tube to glow so hot . Can anyone shed any light on this for me . The set was working. The damper,highvoltage regulator and rectifier tube are new .