2004 kia amanti stero system on 2004 Kia Amanti

my stero display screen is saying (no con.)s radio works fine but won't display radio station. any suggestions?

Asked by for the 2004 Kia Amanti
Disconnect the battery and reconnect. It will reset it
that don't work how do you reset the computer
did noy work
1 more answer
Mine did that recently. About two weeks later the alternator went out. When we replaced it, the radio display worked. And my chargers started charging even when the car was turned off. I am not sure how long they had not charged because when I first bought car, I didn't need to charge my phone that often.