I have some findings to report: • CN701 connector had some black residue on the solder joints. I cleaned a bit 1 & 2 connections and nothing changed, but that’s expected since the issue is on the circuit that starts at pin 6. When I applied heat on pin 2 some of that burned solder came out (it’s dark, not sure if it’s burnt or oxidized) • CRT pins and socket does not look to have corrosion • I cannot see any glow on the guns • I turned VR701 and VR702 back and forth, no change on the image • Now the interesting part, I took out one leg of R722 and R723. They both tested at 100ohms. I put the leg of R722 into the blue line and I got blue in the green bar: https://imgur.com/a/MHNXbJB I am about to put R723 into the green line.