After start up some times the screen will be all green boxes with the prompt “loading”. If I turn it off for a few minutes it will boot back up and function properly. I thought it might be heat related as I leave it mounted in the plane but then it happened just after pulling it out of hanger the other day and it was in the 50’s so heat isn’t it. I thought maybe it needed more time to reset so I flew a XC and it did it but as I got closer to my destination part of the sectional charts where showing but this was after about an hour of flight time. Once it showed me on the sectional the rest of it populated. It will load a flight plan and all the instruments will be correct heading and such and the ADSB still shows as well as the low enroute charts it is just lacking the sectional. I have deleted and reinstalled the sectional charts and program several times with no joy. The unit is 4 years or so old so that might be a contributing factor as My wife flies with a new 720 on her lap with no issues other than an occasional GPS lock but that is because it’s in her lap and she just holds it up for a second and it is GTG. Just thought I would add this thread in case someone has seen this in the past.