Just swapped my Humminbird over to a new boat. It was working perfectly before the move. Now... continuously goes from working fine, to working intermittently (screen shows graph for a moment, then nothing, then graph), to not working at all (nothing on the screen). My first though was a loose transducer wire, and that may be it, but the odd thing is that it seems to work better when my trolling motor is running????? The transducer wire is isolated. I ran it on the opposite side of the boat from all my other wiring, so I wouldn't expect it to be an electronic interference issue.

Any of you experienced similar troubles, or have an idea of where I should start?

Thanks!