I just got a '02 carbon black M5

It has the NAV with TV receiver installed, however, I can't seem to get any picture on the screen

I got the TV channel sound ok, but the screen stays blue no matter what I try

And there's a blacked out "CODE" section where I can't select... Does anyone know if it's becasue the dealer has locked it?
How do I activate the TV pictures? I'm talking about standing still with parking brake applied, not while moving too

Thanks in advance everyone!