Hi, I am at a loss why my machine is not resetting. I purchased it last year not going. I have cleaned contacts and resoldered some connections. The game lights up and makes the usual noises but the shutter goes from closed to open and no ball appears. If I open relay by hand, ball comes up but the playfield won't stay in the closed position. If I put credits on scorer and push the red button the machine advances odds but playfield won't close or put ball out. Can someone please help .(btw is an early 1957 model) Also when I trip coin switch no credits show on counter, and I can only trip coin switch just the once.