2008 4.8i -- My screen went black and won't turn back on. It's been black for a couple of days now. Before it would always come back on after re-starting the car.

If I shine a flashlight on the NAV screen, I can still see the menu and control the system. Seems to be a backlight failure.

Do I need a new screen or can I just buy a backlight?

I bought the Route 66 extended warranty when I purchased the vehicle in August, but my warranty did not have the option of electronics coverage