Horizontal problem RCA 14S7072

[N8NM]

Hi all!

Well, my first vintage TV project was going well until tonite when the horizontal decided to go haywire (loss of sync, audible squeal, blue glow in output tube.) It also looks like the flyback may have been running hot as there's a fresh drip in the HV box.

The set has been recapped and was working beautifully until it suddenly "freaked out". Other than a quick sub of the horizontal output tube (same symptoms), I haven't dug into it... Figured I'd tap into the wisdom of the group first.

So, any suggestions?

Thanks!

-Steve