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The blue tint on the nav screen normal? It only happens when it's hot and sunny outside...Sometimes it stays on through the whole trip and sometimes it goes away on its own after a few minutes .
Go into the Menu/Settings/General/Button Color and change it from the default Blue to Brown.
Watch your screen and see if the "halo" or edge bleed is now Brown. If so it would seem to be OK.
I've never noticed the blue halo/tint effect on my navigation screen. I even went to the garage just now to check, car is on the other side of the wall of where I'm typing this reply ha.