My radio was turn off when I turned my car off. Now when I push the power button for the radio it constantly is saying audio mute, the volume keeps going up, then the volume goes down, and it flickers between different stations. All this is happening without my intervention as soon as I press the power to radio. Is there a hard reset that needs to be done or could something have gone bad? I haven't had a single issue with my optima until this one. It worked fine the day before and now this is happening. Any help would be appreciated!