I have an MK1 conversion that just had the monitor die on me this afternoon. I'm not sure what game was originally in the cab, but it was not MK. The board still seems to boot fine, (I can hear the game boot, and buttons allow you to select a character), but the monitor displays no picture. I'd guess a tube swap would fix this, but I finally got my MAME cab working and don't really have any interest in trying to repair it. The coin door and mechs all work.
Asking $75 or best offer. Located in Ewing, NJ.