My home stereo plays CDs but no Audio?

I have a Panasonic SA-AK200 with 5 CD changer. The Problem Is That It Plays CDs But No Sound Comes Out. I Know That it plays CDs because i can hear it spinning and in the display it shows the number of songs in the CD and the timer of the song currently playing. and when i switch it to radio or AUX the Speakers Work just fine. Anyone know what might be wrong with it and how i can fix it? i opened it up to see if there was any obvious damage but theres nothing.