Alright guys...here is the problem. Last summer my garmin units (2210 and 3210) were shutting down due to "High Voltage." This issue started on my 2210...so I switched over my airmar m260 to the 3210. Well, after I switched the transducer over the 2210 started working fine and the 3210 started giving me the "high Volatage...unit will shut down in 10,9,8.....then the unit would shut off. SO which ever unit I had the airmar m260 transducer hooked too would shut down because of high voltage so it has to be something with the transducer. Any ideas what this could be? The 3210 was brand new and I believe we updated both it and the 2210. I have since bought a used m260 that I am thinking about putting in the place of the existing m260 that is sending high voltage. Before I pull it out I wanted to see if any of you guys had any ideas or if this has ever happened to any of you?? Thanks for any pointers!