why is my ninja gaiden jamma displaying up side down

please help. i recently got a ninja gaiden jamma board. it played fine in my cab for a few but then it started to display up side down! can anyne help me? why is the picture showing up up side down on my moniter? any help would be greatly appreciated. thanks pm or email

Check for a flip screen DIP switch. You can use test mode to help check the DIP settings.

thanks ill do that. does anyone else have any suggestions?