I was messing around in the navigation engineering menu where you hold telephone and menu buttons down and enter "1971" to access. I selected s/w update, confirmed and now my nav screen is black and the climate control LCD displays "50/51". I know there is nothing wrong with the audio unit itself because I put it in this mode via the s/w update button. Does anyone know a way to revert it back to normal operation without having to buy a nav DVD update or otherwise without having to spend any money? I found other threads on the subject but no definitive answer for when this results from the s/w update process.

 

Look for threads on 50/51 or loading.kwi

You need a sat nav disc with the firmware to load into the module or else change the module.

 

I did the same thing.
did you figure out a solution ?

 

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