So I just bought the elite 5 dsi and I can't get it to come on. I hooked it all up to my boat battery and nothing. I did this several times and no luck. So I take it back to gander mountian and hooked it up to the power source they use to run their display units and it comes on. So now I am home and I still can't get it to come on. I have hooked it up to the boat battery, my truck battery and my wife's vehicle battery and it still won't work. Any ideas on how to get this to work?