Not by the book but...
Warm set up 1 hr.
Turn down color, should be perfect B&W.
If not tweak the R, G, or B bias to get best B&W you can.
At this age it may be the CRT. Reds can take on a "muddy"
brown look. Try that. If not screen shots with no color &
normal color may tell the story.
73 Zeno
