Model S 90D. Is there a simple fix, or is this a software update issue? Over the past month, I had my screen not show the backup camera view about three times when backing up. I drive the car almost daily, so the percentage of failures is very small. Just get a blank, grey screen. It works fine after a hard-reboot of the sreen--holding both scroll wheels down for about five seconds. I'm just about a 12 months, so I'll be scheduling annual maintenance soon.