O'Boy. O.K. One can activate the top flipper ( checking it) by manually lifting
the bottom flipper and pressing the cabinet button.
1) Nothing happens?
a: check the wiring from top flipper to bottom flipper.
b: check primary voltage "brown wires" for continuity.
c: temp short contacts on the outside "make" E.O.S. switch.
d: temp short contacts on top flipper E.O.S.
e: check the wiring on top flipper coil ( are they connected to the right lugs?)
f: check the soldering, is it solid, cold, Etc, Etc, Etc.
g: post a mini video of your problem.
h: post sharp clear pictures of your problem area.
i: if all fails, call a good tech.