I picked up a White Water recently that had the 7 Optos not working. I’ve replaced some Optos which were poorly soldered and looked suspicious. I replaced the 7 switch Opto board under the playfield with a new one. I replaced the U20 chip on the CPU. I replaced the C2 capacitor on the power driver board and still nothing. We have 12 volts going down to the 7 switch opto board and also 12 volts going out. On the power driver board LED 3 is not consistently lit like all the others. Not sure if it has to be or not. In switch test I cannot get any of the optos to activate.
When I boot the game the eject on the left and back of the game fire as I believe the CPU must think there is a ball there but obviously is not the case.
I really don’t know what else to check. Can you help please? Thank you!!