Not 100% on this Joe since I've never done it. I'm not sure if the pico has a 2nd power supply or not. Your right though, not sure how it would have power/signal to then turn back on
when turned off. They may have just been using it as a kill switch to completely kill the tank while it was on the battlefield. Unfortunately the HEAT website seems to be down as alot of those guys are the ones I remember doing it back in the day.