The nav screen in my 06 TL is black with what i call static bars going top to bottom on the screen( see pic.) .the small display above the nav screen also only displays the ac and time info. I cant get in to the diagnostic mode either.
I think its the screen, not the nav rom system in the trunk. I have never gotten a disk load or any other errors. It just was blank one day.
I haven't seen any posts regarding possible screen issues, only trunk rom unit issues. any help would be greatly appreciated!

 

Nobody ever says anything about this issue