A little more troubleshooting has ended with my now losing the raster mostly. If I turn up the G2 a bit I can see something, but it's all messed up.
If I display something with color it doesn't seem to come up, it's just a murky white raster, but it will sync to a black and white image a little bit if i tweak the free running horizontal frequency to match it
I pulled IC250 and IC320 and they test normally and identical to a new part, so I think they are okay. Pretty much every part I test is okay, and yet things are still wacky over by those two ICs.
I did notice that the voltage on Q317 is also very off, I'm assuming because of Pin 10 of IC302, and that it's connected to a relay on the D boards. Although I don't see how that would effect things, I can tell there's some switching problem with the Multiscan circuit because it's not kicking thing into gear correctly.
The only other lead I can think of is that I had to replace Q310 twice already before things went totally south. It's now acting just fine I believe, so perhaps whatever is wrong now is somehow related to Q310 blowing previously.
Q310 was involved with this area where I thought there was an 18V zener diode missing (but it turned out after looking at photos that it was unpopulated). Once I replaced Q310 the voltages in this area all started looking good, but then it developed this new (seemingly worse) issue.
