Cannons and VUK never fire, even in coil test: check every driver board fuse

If the ball poppers load the cannons but the cannons and the back VUK never fire, and those coils also fail in coil test while their switches test fine, check the fuses on the driver board one by one with a meter. Here a blown driver board fuse had been overlooked after every other fuse was checked. Also check whether the dead coils share a supply switched by the A/C relay.