When turn ignition back radio will not come on at all?

If the radio does not turn on when you turn the ignition back, it could be due to a blown fuse, a faulty connection, or an issue with the radio itself. Check the vehicle's fuse box for any blown fuses related to the radio. Additionally, ensure that the wiring connections to the radio are secure. If everything appears fine, the radio may need to be repaired or replaced.