Navigation Green Flash Screen
 

I created this account for my friend who has a 2005 tsx. This is a new account so I am sure I probably did something wrong as far as posting this properly so I apologize in advance.

The issue he is having is his navigation system just blinks green when the car is on. It doesn't do anything else. Is there a way to reset this? Can you just unplug the battery for little while to reset or is there a deeper issue? Thanks for any help.