Got a Demolition man where the top flipper didn't hold. I changed the diode, changed the coil, checked the wires, changed the ribbon cable to the fliptronic card, changed transistors on the fliptronic card ... spent at least a week troubleshooting this.
Then I decided to swap the fliptronic card with another machine - now it worked !
That was when I noticed one of the pins on the connector for the ribbon cable was broken off
.. 5 minute fix and it was working