CDX S2010 CD player acting up

The faceplate is lit, however the "off" button is the only button that functions. I had the stereo on when this happened. I was increasing the volume and when i released the button it continued to climb to max volume, played for a moment and then quit playing. If I insert a CD, it will autoplay the cd but only at max volume, none of the buttons will function and my only option is to eject the CD to make it stop playing. I did check the copper contact from the faceplate to the actual stereo and it appears to be intact. I disassembled the faceplate and all of the buttons are working internally, despite my thoughts that one might be stuck. Ideas?