Having trouble with my Crystal Castles upright. Game plays for about 5 - 10 min then locks up screen goes blank and it makes a continuous tone sound. Thought it was powersupply pcb so I rebuilt it. That wasnt it. If I go back after an hour it will start up again and play for about 10 min again then lock up. Anybody have an idea? Maybe the cpu is going bad when it heats up?
