Quoted from BigAl56:There is a jumper on J3 of the the SD board that moves 5v from the power supply to the coil section. Often that jumper or the solder to the pins gets loose or cold. That causes all your coils to die but they come to life with a light touch or wiggle.[quoted image]
Al since you worked there at the time... why did they design the circuit this way? It's caused a lot of grief over the years so much so that most people I know tie the 2 points together permanently. Was it designed in modules by separate people and they kind of melded it together at build time?