Switch number 31 to 38 do not work. They are all in the same column. I think I may have shorted something while changing lightbulbs because they did previously work. Anybody know what I should look at on the CPU that may have shorted out?

I did the jumper test and column three does not work when testing. Is U20 the likely culprit? I inspected it well and nothing appears to be burned.

I have not replaced that u20 yet but I got the part I needed so going to do it soon but I also have a problem with the dancing dummy. In test mode the coil pulsed a little so I replaced the coil and now when I go in test or game mode, when the coil attempts to fire the game reboots. Any ideas what to look for here?

Thanks for that tip, it did have a diode so I cut it off. I am back to my original problem now. I guess it was not the coil. The coil pulses in test mode but it doesn’t fire like it should. I am pretty sure I have it hooked up correctly. All other coils work correctly

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I replaced U20 And all the switches now work. everything now works on it except the dancing dummy.