Faint diagonal lines on monitor

hackbar

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I have a Joust machine with a Vision Pro MTG-1901CN monitor. There's a few problems with it, namely:

Faint diagonal lines, about an inch apart.
More faint horizontal lines at the same interval.
Background is light gray.

The background should be a simple contrast/brightness adjustment?

But I'm guessing the lines are from the beam not turning off during horizontal VBLANK, right? What's the fix for this? A re-capping?

I've attached pictures. The fat 45-degree lines are camera artifacts, so please ignore. CRTs are hard to take pictures of.
 

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turn down your screen knob on the flyback and those lines should go away.
you will have a bit more brightness and contrast control a well.

other than that i know nothing about those chassis.

Peace
Buffett
 
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