Report "I've got a Humminbird 535 that has sporatic depth readings, it jumps to 500+, 800+, 700+, 600+, etc. all over the place. I've checked everything I can think of, no crimps, no bent wires, connectors, etc. Can hear the transducer clicking. It's been on the boat for a couple of years, and started this at the end of last year. Up until then never had a problem - although it never read fish quite right... any thoughts? Wondering if it could be a bad transducer, but I read that the clicking noise normally means the transducer is ok"