On my '78 Gottlieb Solar Ride, when all five drop targets are down, they move as if they are going to reset but then they all drop again...this happens both when I hit the outhole with 'reset targets' lit and at the start of the next ball. If 1,2,3 or 4 targets are down, they all rest properly every time. It's got a new power supply and CPU board fitted so hopefully it's a switch or something simple but all the switches appear clean and properly adjusted. Anyone with a Gottlieb System 1 had this problem?