I have a Speed Racer and a Fire Drift that like to lock up. This especially happens when the stop buttons are pressed fast after numerous plays. Any ideas what is going on? I have tried a reset and the machine will reset fine and will paly normal for a bit, but eventually the lock up problem will come back to haunt me within 15 to 30 minutes of hard play. The Fire Drift seems to do it more when you hit a bonus or a large pay out. Anyone with any ideas would be very welcome. The Speed Racer does it when ever it wants. Racer X and Guzmo lights blue this usually only happens (normally on a payout) but this can happen at anytime and then the machine is locked up.. Again any help would be appeciated.

Tony