I have a Dynon D10 connected to a Garmin 430 via a DS34. I haven't flown in a month, turned on the master switch and the D10 screen displayed everything perfectly but upside down? I shut the D10, same thing. Started the engine, same thing. I flew, VFR of course, for two hours. It responded perfectly but the image was upside down? Blue was on the bottom, brown on top, all with all the other figures? What gives? Nothing has changed, the D10 had been in to Dynon for inspection last Fall because of a problem with the HS34. We have had record heat where I live the past month, 100+ but the airplane is in a hanger?