Waylon

thx, but new battery from Jag ($$$$) was installed. I'm 100 miles day, mostly daylight so don't believe it's battery related. Again, this only started recently. I did have incident in Aug, on trip, highway driving hot out, a/c on, used cd player, and suddenly, out goes panel. Eject cd, opened windows, and 10 min later screen came back on. Did not use cd player, went back to radio, no prob after that. Very strange.

last 2 months, live S FL, USA - colder weather days especially. In a.m., Nav Panel blank, no control of a/c-heat,radio, etc. Depending on how cool, screen comes on 1/2 hr later, everything ok. During day, car sits, start, blank screen, 5 min later, on. (But if car sits in sun, never a problem). In Sept and before, no prob. Not sure it's weather related? (affecting some component). Car sits in sun, no problem. 2005 S model, only has 70K, is in excellent shape.