Had my Etrac less than a year without any problems, I love it. But a weird thing happened today where my pro- coil just quit on me completely with out warning after two hours into the hunt. It would not pick up any metal. The SunRay probe still worked fine. I came home and threw on a 10x12 SEF coil I had with my Explorer and that worked. Should I feel confident that it is just a failed coil or should I suspect maybe that the detector is causing the coil to fail. It is still under warranty so I want to get it right. I will call Minelab in the morning. Anyone else run into this?