I did a firmware update to the latest version last week and it all worked fine.

Since then its been flashing on and off ocassionally and acting slightly odd....

Anyway today I was driving and it went back to the 'bmw' logo....and just completely turned off together with the radio working.

I turned off the ignition and put it back on and i got a blue screen and the navigation option has now disappeared.

How can I get it back to normal?

Any help would be really appreciated!