Replace the bulb. It's very small behind the fan switch knob. Pull off the knob and pull the bulb straight out to replace.
The lights on the panel for the heat/ac are off when the car turns on. Noticed this started about 2 days ago. Occasionally, when they lights turn on they have turned off the radio. On a few occasions, if i tapped the panel the light have come on... is it a fuse or a loose connection