Vision Pro MTG-1901 Vertical Line on Screen

[daeven]

I have a Happ Controls Vision Pro MTG-1901 installed in a cabinet connected to an ArcadeVGA.  There is a white vertical line about 2" from the right edge of the screen, plus a few "dancing pixels" close to that line.  The game image is also displayed, but I would like to get rid of the vertical line.  no adjustment on the remote PCB gets rid of the vertical line (short of ridiculous brightness/contrast).

This monitor has very little use.  I bought it new and didn't plug it in for more than a few minutes until a year ago.  I think it looked fine at the time, but now that I got back to working on this project, I'm seeing the line.  A different monitor worked fine, and a different ArcadeVGA didn't fix it.