12 button navigator not lighting up, why?

[Sherri007]

I got a 12 button navigator that all of a sudden stopped lighting up. But, when I press and hold the time button, it lights up just perfect. Any ideas on why this is happening and how I can fix it?

[Dodge Aries K]

The time button will cause it to light up even if the car is off, it seems that the fuse or the wire that supplies power when the car is running is not doing it's job.