I have an AC powered electric fence controller (Fieldmaster 15) that is giving me a problem. I find that at times it is not working. If I unplug it and plug it back in it starts working. While working if I short it out with a screwdriver it will arc and then stop until I unplug and replug again. Can't find anything grounding the fence out to knock it off. Anyone ever have this situation happen to them. I checked the voltage with a meter when it is operating and it pegs the meter so I know it is putting out maximine power.