Is there any way to test a transducer on dry land?<br />My Humminbird Platinum ID 120 "sort-of" worked on my maiden voyage. It seemed to be intermittent, sometimes it would read the bottom, sometimes not. Towards the end of the trip, nothing was happening. It seems like a bad wire, but I since this is my first boat with electronics, I really have no idea what to do. I contacted the Humminbird web site and have not heard back from them.<br /><br />Any help?? Is it worth keeping the head unit and spending $50 for a new transducer? (I think can replace the whole unit for not much more than that!)