I bought a 2008 last fall and have just been riding it now for the last 2 days. Everything seems to be functioning except the Navigation. When I search by address, the street number screen comes up and I can enter the number. Then I hit OK or whatever and select street name. That screen comes up and the screen is lit up with the numbers and letters for only about 2 seconds and then goes dark. All that is left lit up is the right and left arrows. Any ideas on what to do about it?