K7000 random Blue screen problem I've got again. Every once in a while my background color use to go to a bright blue. I replaced the AC cord plug and it fixed the problem till today when I moved the cab to another room. Now the blue screen is back and the coin mechs are not registering coin ups. Any ideas what might might be causing this? Possibly a loose ground in the cab? Its a standard Jamma Dynamo cab.

