Avic X3 cndv 100 problem

[VUK]

Hi all

 

My girlfriend has an avic x3bt head-unit in her mini for 3 years now.

 

Runs no problem until I decided to insert cndv 100 disc (was on cndv 80)

 

Updated OK but on map screen the buttons have no arrows and map colours are rainbow like, like corrupted.

 

I tried downgrading but apparently x3 cannot be force downgraded?

 

Any ideas?

 

Thanks