Looking at the pixs of the force on your CRT is at least
good if not better.
The color is probably OK & you are just seeing that but no video.
Take back what I said about cathode voltages. This uses less.
Keep in mind as the cathode V goes higher the pix will darken
so I bet all 3 are up to 120 VDC.
Measure the DCV along the video chain & trace with scope & see
where the video drops out or the DC voltage is off.
73 Zeno
LFOD !