New Life Games Tech Forums

I have 2 - 7200 Gamemakers I am trying to hook up to Oasis Sentinel II system. I have the correct harness from the sentinel board to the mother board but when I plug the harness into the mother board and power up the machine comes up then goes blue screen then back up etc. both machines do the exact same thing. If I unplug the harness the game comes up and stays up. is there something I need to unplug from the mother board that is interfering with the game? any help would be great.Thanks