I would start by checking the fuses but I can tell you if the fuses are good and the light for the radio comes on the amplifier inside the radio has probably gone out. Here is a guide to help you and how to remove the radio for repair if the fuses are okay.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.