I know this is a very old thread but I thought I'd update with my current problem on my 2013 Limited...
The symptoms were very similar, no lighting and non responsive HVAC and radio control on the center stack below the touchscreen. Therefore no heating control at all and it somehow defaulted to heat and high fan speed. Hazard button didn't work. Coincidentally, my right front turn signal bulb blew (which is probably just a coincidence).
Disconnecting the battery for 5 minutes fixed the center stack problem. Thank goodness as the new panel at the dealer was going to be $1700cdn!