Very strange indeed..
Some of you have reported the white screen problem where it turned out to be a loose display cable...
Well, once in a while I get the white screen, but it doesn't appear to be caused by a loose cable. If I cut the DC power to the screen and reapply it, it works fine.
If you can dream it you can build it ( I think )
I have a similar problem in cold weather. But the screen comes back after I warm up the interior of the car.