I'm working on a Williams Dracula. The volume up adjustment switch inside the coin door doesn't work. I changed the adjustment switch and same result.
I swapped the power wire from the down volume switch to make sure the new switch works and it does. I can confirm the new adjustment switch works.
Next, I followed the wiring up to the mpu board (J205), pin 8 (orange/violet) I get continuity from the coin door switch up to J205 pin 8 no problem. So have no wire breaks. Anyone have any other ideas on why this switch may not work?