[Beemn Milan]

Had my NBT replaced with a later model unit due to mine having signal failures, my question is what is the normal colours for the navigation maps?..originally it was nice bright pale grey land and yellow and white roads, easy to see in the daylight. now it's greenish/grey/blue sort of and when changing map to. classic or alternative no change, same with day/night/auto.
When split screen is used the map on the split screen is how it should be colour wise and when switching between classic and alternative it does it's thing and changes...but still the main map doesn't.. any ideas?