Last month after tying up my toon securely to my dock which included a rope beneath the toons my Simrad stopped displaying depth and water temp. I checked the transducer fixed on a bracket on the port toon extending a couple of inches behind the toon. It looks normal, no weeds or anything adhering to it. I don't believe the rope extending beneath the toon ever came in contact with the transducer. I checked the connections on the plotter and all seems normal. The unit does display nav and position data. Any suggestions?