I just picked up 4 pachislo's for 175.00 2 are working 2 are not, The problem with the Derby Boy Pachi is the 3 wheel stops and goes and the skill stop buttons wont stop any of the wheels. The buttons are recognized according to the L.E.D. lights on the PCB but still will not stop the wheels and they will spin forever they do not time out. Any assistance would be great, thanks.