Yes. There dust. It's the spot that the ceiling collapsed on and has been pouring water into over the past decade. The monitor is there but not intact. And the pcb sound board has all the chips rusted off and traces gone and plexi has had its artwork long removed by water. I have a rusty power...
I see this all the time in pairs of games. More than likely the polarity of the monitor power is swapped. Line and neutral. Even though there is an iso transformer it can still cauze distortion on another monitor on the same circuit. Or anything in the cab wired not correctly ie grounding ...
Someone installed a 802 in my lunar lander and the picture was jittery with the 801 installed issue was gone. The 802 worked perfect in another game. Idk.