thefader
New member
I have an old atari cabinet that has been converted to jamma. I installed a new harness, so far only hooking up the switching supply, and the monitor connections. I turned it on, and the game plays fine. After about a minute, a "Squeal" starts coming from the monitor getting louder and louder. I quick unplugged the game, turned it back on and the squeal is there. I tried this with another Jamma board, and the same problem. When I boot the cabinet up with out a board, the sound is gone. Anyone know whats going on?

