Hi all - Hopefully someone out there can shed some light on my present predicament. I had the dead battery replaced on my 2009 Sonata and now the CD's won't play, eject or change. The radio works fine. The screen shows "Disc Checking" and stays that way when CD/AUX is selected. I've disconnected and reconnected the battery without success. I don't want to replace the audio system if I can help it. What are the steps to remove it from the dash? Any and all help will be greatly appreciated. The car only has 45,000 miles on it and I love that V-6 engine. Thanks.