Please bear with me here as I am real new to arcade repair.
I built this cabinet a couple years back, it is a standard JAMMA only machine. I moved a year or so ago and didn't touch the machine for a while. When I did get around to getting it all setup, I started noticing this problem intermittently, but it would go away. Now the monitor constantly stays in this state. I wish I knew how to describe it, but I don't, so I am including a picture.