Quote Originally Posted by Hlleonard View Post
There seems to be no limit to crap... Took the pontoon out for the first time yesterday and discovered the humminbird I put on it last year mysteriously won't turn off now, it starts great, operates same as last year but when it was time to turn it off it decided it wasn't ready to quit, unhooking the power cord worked but I see a monster in the woodwork, just a matter of when.... It's probably still under warrantee but thats just more crap to have to deal with.
RE: the Humminbird not powering down. Try this : http://www.humminbird.com/uploadedFi...oubleshoot.pdf

I had the same problem with one on my pontoon boat when I had it, and it turned out to be intermittent power to the head unit, in my case, fixed by readjusting the power cable position in the connector in the base.

Quick check, power up the unit, grab the power cable from below the mount and wiggle it some, then try to power down. Repest as necessary wiggling the power cable around to see if you hit a position where it will shut down. Lack of power or intermittent power to the head unit confuses the microprocessor and makes it fail to issue the shutdown command to the unit. Also remove the unit from the mount, and check to see if the pin that goes into the power cable, on the head unit is loose. If it is, then yep.....time to talk to Huminbird.

Hope it helps. I got lucky with mine and it was just the power cable not to tight or well positioned in the clip in the mount that allows it to mate to the head unit. All mine took was some repositioning and a little electrica tape around the cable to keep it snug.