I recently bought a MVS 1-slot JAMMA board and a MAK Supergun.
But when I try to start it up I only get some very weak grey stripes on the TV. They dissapear after 2 sec.

I tried to clean the contacts on the MVS board alot, also tried to clean the MVS game, but i still only get some grey stripes.
I have no idea if its the game, the MVS board or the Supergun thats defect.

Any tips on what to do?