I will have to look at software not sure. It is connected to another unit through interlink. Not sure on how it is wired would have to look. It only does it when scrolling screens. Has never done this when removing map card as far as I know but then again I never take out the map card. I am running a DieHard PM1 (I think) battery. It should not be the problem as it did when battery was new. also did it on old battery I had on it. It does not do this when cranking the big motor Merc 150 Opti. Only does it when scrolling screens.