hi KiwiJochen, thanks for the reply but it doesn't work.
as i said the system seems to try to do something when the door is opened but no logo comes up, just a different shade of 'blank'.
i have observed the LED activity light and it does go off after 60secs as you said.
your right about the 'cold start' though- the logo shows when i turn the key after allowing the nav to shut down completely. otherwise if i turn the key too early it will go straight to the menu.
i have posted on another forum and there a few guys having this same problem with it not showing when door is opened, i wonder what it can be?

Cheers