Problem with NAVI and HVAC unit
 

I posted this in AV but maybe its better here since its the hvac too

Ok, so today something very strange happened. I was very low on gas down to about 1 gallon (i never let it get this low, but was going to jersey where gas was cheaper and had 4 dots, but of course they disappeared within 20 miles) and got to the gas station, turned the car off to fill her up. When I started the car the navi screen was stuck on the opening nissan graphic just looping over and over again, no sound, no navi nothing, and the hvac was stuck on ac blowing full blast coldest air possible. Im taking it to the dealer tomorrow just wondering what on green earth could have caused this? Anyone ever have this happn?