Quoted from schudel5:Game off, reseat the ribbon cable on the back of the DMD and follow it up to the driver board. Reseat it on the driver board too. See if that helps.
You can pull the DMD out of BSD, take it over to T2. Remove backglass on T2, flip speaker panel down and remove power cable and ribbon cable and hook it up to the BSD display. Just be careful of the exposed back of the DMD will have high voltages present so don't touch or lay against metal. See if it's still the same. If it is the display is going. If the display looks good, probably the BSD driver board has an issue.
Excellent troubleshooting advice. With two games of the same generation swapping things around to find exactly what went wrong is a great method.