I got my Hoffman 610 put back together enough to try today. It was as if someone had started repairing it a few decades ago and never finished, all the tubes were in a bag, some capacitors and resistors were missing, disconnected, etc. In this condition I just decided to recap the whole thing, check all the tubes and such before doing anything. I finally got it put together just now, and I turned it on and, nothing happened!
No picture, no sound, nothing. All the tubes lit up, including the crt, which tested good, I heard the yoke ringing when I adjusted the horiz and vert. And there was a bit of static out of the speaker whenever I changed the channel. When I turned it off, I went to discharge the HV, and there was nothing there, or atleast not enough to see.
Now the flyback looked like it had barfed up this red stuff all over the inside of the HV cage a long time ago, not just leaked underneath it, but on all sides. I would bet it is bad, now I have seen them that leaked a lot and still worked, but since I found this stuff a good ways from the flyback it looked like it exploded this stuff at some point.
Does any more service information for this set (Hoffman 610, chassis 140) exist than what is in sams 97A, which I have. It is a schematic only and does not give any voltage readings, or parts information, so I can't check things out further.