Ran upon an issue that was unique to say the least on a location pro machine. Went to play the game and the screen was completely off / black but the PF lights were on but not cycling like attract mode usually does. Game uses a card reader for credits so swiped card though, looked up and the screen turned windows blue and no credit was rung up. Phoned the operator and let them know what was going on. UNder op's instruction I turned game off, waited 10-20seconds and turned it back on. Game came back on and everything appeared fine video screen and pf light wise. Credited the game and hit start. Game worked fine the rest of the visit. Issue reported to stern.