Motorola 9T1, did I ruin it?

[dano]

I picked up a Motorola 9T1 a few months back, in pretty complete and reasonable looking condition, so last night I decided to see if I could get it to do anything. I start by checking out the chassis. There are quite a few wax caps under there, but nothing showing signs of failing. I hook up a modulator and DVD player, hook the set to a variac, and hook a DVM to the B+. Initally I just get scrolling garbage on the screen, then after a long time tweeking the knobs on the back of the set, I actually get a real picture. I can adjust the size, position, etc and it actually looks pretty good, and the sound is working too. I watch it this way for several minutes, then shut it down. I still have the variac at less than 90%. Tonight I try it again, sound seems fine but nothing at all on the CRT. B+ is about the same as yesterday. This is the first TV project I've decided to tackle so my plan was to keep things working while replacing a couple wax caps at a time. Now I'm worried I've run it too long with the old caps done something that can't be un-done, and don't have the experience to know how to proceed. Could I have damaged the picture tube or flyback? Is there a part of the circuit that I should check out first? Maybe I lost high voltage? I hate to probe around that area too much without knowing exactly what I'm doing