I just upgraded my AF game ROM from L-2 to L-5.
On L-5, the Thing Flips no longer work. The ramp switches and #57 opto work in switch test. There is no "Let's go Thing", and the flipper does not react.
I reinstalled the original L-2 ROM, and the Thing Flips works. Is this a characteristic of the L-5 ROM? I've done searches of previous posts for flips not working, but all end up as a wiring problem.