All electronic radios have two power wires; one for the ignition switch and one for the clock and station presets that is always live. How a radio responds when one of those circuits is dead depends on the model of the radio. Some of them will be totally dead. Some will have a display but no sound and no response from the buttons. Some even work fine but go back to 12:00 each time you turn on the ignition switch.
It is possible there is a problem in the radio, but given the additional symptom, it's more likely one of the power circuits is dead. Start by checking the fuses. Only one will be labeled "radio". The memory 12 volts will be tied into some other circuit like the horn, brake lights, or cigarette lighter.
Wednesday, April 6th, 2016 AT 3:44 PM