[Adam]

I made some progress on this today. I replaced 2 bad resistors on the convergence board, R192 and R193, if you're following along in the sams. Also replaced the 2 paper caps on the convergence board C124, C125. And replaced the selenium rectifiers (even though they tested ok) Now the convergence is basically good (it still needs adjustment, but it's not way off anymore) That solved one problem...
But the picture was still way too blue. And I still had a large thick blue line in the setup mode, red and green lines were ok. I started checking voltages at the crt. I checked the G2 voltages, all good. I checked the voltages at the cathodes, and they were ok. Finally, I went to check the G1 voltages and noticed that the blue wire was loose in the crt socket, I stuffed it back in the socket, and that fixed it. But I suppose I should take the socket apart (you have to drill out 3 rivets to get in this one) and solder it back on...
I still haven't looked at the power tuning.