dot matrix on hook?

HAVASUGAMEMAN

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ok so i thought that display was bad on Hook, came across a batman and pulled the display out and swaped it into hook,yes i changed the chip,but get the same problem.hook display works great in batman.next changed the ribbon cable,still same problem.Is it possible that the game prom is bad on the display? or is it something on the cpu?
 
A friend has one on location that the display would go blank every so often. Turns out the ribbon cable had a bad connector on the end that plugs into the cpu board. Replacing the cable fixed it.
 
check the high voltage section on the power supply

could be theres a problem with the 100v
test the output with a multimeter

circled the problem area in yellow
 

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not a ribbon cable or voltage problem. has to be either matrix prom or a chip on cpu. info on display is out of place everything is there just not in the right place. kind of scrambled tried to post video but some reason it wont post?
 
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