No sound from radio. I have a 2012 hyundia sonata without the Navi system. Why is this happening?

Check the fuse box under the steering wheel (left side) remove radio fuse it being hold by a yellow clip holding another fuse. remove for 10 second reconnect and like magic it should restart the radio system. I to own a 2012 Sonata

I would bring it into service have them take a look

I'm no expert, but sometimes it might just be corrosion in the speakers themselves or the wires which connect then to the radio/sound system.