Ok I installed a different SDB in the pin and tested at all the test points on the SDB,MPU,and rectifier board. The machine works great now and all test points tested perfect on all 3 boards. Everything works perfect, except for the flippers don't work. The flipper buttons work fine however, just the coils won't fire.
All the other solenoids work and I am getting 43vdc to the flipper coils. I replaced q15 xsistor on the SDB and that didn't help. I can get the flipper relay to pull in when I ground q15, but that's it. Ideas???
I also checked the diode buy the flipper relay and it tested perfect..
Not sure what to try next???
