First isolate the problem to either mechanical (both coils frozen because of mechanical issues with the snap target unit) or electrical. If electrical, you will have to find out how the power reaches the coils. Reading the schematic, following the color coded wires & looking at the names of the relays are some of the ways. I will be at a friend's house Saturday evening that has a Royal Guard. If you haven't solved the issue by then, I will take a look.