I have a Humminbird 570Di that I have had for about a year. It is fused and is never left on the boat. Recently I was unable to turn the unit on. I checked the power at the connection and it has 12v. I was thinking that maybe it was not making contact so I took the cable out of the base and attached it that way and it still will not turn on. Does anyone have any advice or other things I can check? Are there internal fuses that may have blown?
Thanks
Brian

