Hi guys, hope someone can help.
I have a 2001 E39 M5.
It had a fully working MKIII unit.
I recently got a MKIV unit and swapped it over last night, however the Nat Screen is now blank. I can see the back light come on when I start the car but nothing else.
I know the screen is ok as when I switch over to the Traffic Master unit that comes up on the screen fine.
So I have been told that the MKIV unit could be set to Monochrome so I am burning the disks I need now.
However in the meantime I put the MKIII unit back in and the screen is still blank!?!
Is it possible for the MKIII to revert back to monochrome after being unplugged?
Or could it be something else? I did add a Tv in motion cable from yoysinyourcar.com could this have caused the issue?