Ok, the controller for my sons track is not working. Did as the last poster said and still no luck. Not getting any voltage from the variable speed plug in that goes to the tracks. I think it is the jack that is bad as it does tone out. It has been slowly getting bad as you did have to play with it to get it to work. But that doesn't work anymore. Anyone have any ideas to fix it or will I have to break down and buy a new controller.