Has anyone had any issues with their head phone jack receptacle? I was out the other day and my machine went quit on me, I unplugged my head phones and the speaker was working fine so I figured my sunray Rat phones had just died. When I got home I tried them on another detector and they still work fine. Has anyone else had any issues with the jack on the Etrac ? Just wondering if there is a quick fix rather than having to ship it in for repairs. That is such a pain and inconvenience.