RCA 8TS30 - no picture

[bigaudioal]

I have been fighting with a friend's 8TS30 for a few weeks now. Set was recapped, gets good audio and a raster. But no picture. I have spent the last few weeks restoring a B&K 1075 for injecting signals. Well today was the day to try injecting a signal into this set to see if I could figure out where the video was getting cut off. Figured I'd start injecting at the video output tube and work backwards through the IF stage. Well I didn't even get past the first injection. The raster did darken a bit injecting into the grid of the 6K6, but no real signal. I made sure I was not overdriving the signal from the 1075 into the set. However I did notice that the contrast control/AGC really does not appear to do much when adjusted. I then ohm'ed out the contrast control and it only measured 2k. Shoukd be 10k. Could an AGC issue affect injecting a signal into the video output tube? I know if the AGC is not right it can overload the IF stage. Trying to figure out why I get no signal from the video output tube and after. Or do I need to back-track further to see a signal? Or does this AGC issue just kill all chances of a signal getting through? First time doing this signal injection, so any advice or insight would be greatly appreciated.

I know the B&K is working well. Injected signals into working sets and looking good. See attached photo.

Thanks guys!!!