Have a Gottlieb Raven with a problem. Unfortunately ; for me and my tinkering, the problem became doubled. Originally one of the four pop bumpers was not working (when purchased). I checked for continuity at the coil , also checked for power to the coil. Both positive. Cleaned off the switch. Figured maybe its the coil. So I did a move which in hindsight may not have been the best. I removed the coil from one of the other functioning pop bumpers and used it in the none functioning one. Well now I have two none functioning pop bumpers. BUT....they are giving me the same reaction which makes me believe that they are both suffering from the same malady. Something happened during the rebuilding process which I duplicated. Maybe there was something I missed in the video.