CD Trouble Pioneer 2400

Hey guys.  Well, I ditched my JVC with the static issues in favor of a used Pioneer 2400.  I got it for next to nothing and it works for my purposes.  My question is this.  Everything is installed and working great EXCEPT:  I can't seem to get any CD to play.  I load the disk (have tried CD-Rs, CD-RWs and normal store bought CDs), it seems to load fine, no strange noises, not spitting it back out, but when I press the 'source' button, nothing happens.  The radio just keeps playing, it acts as if there is no disk loaded.  I'm getting any error codes on the display. 

Am I doing something wrong? Or is the CD player just shot.  Like I said, I got it for next to nothing, I don't really care is the CD player is dead, but if I could get it to work, that'd be cool.  Any thoughts?  Any ideas on what to check?

Ok, new symptoms that I didn't notice the first time. 

When I fold down the faceplate and a load a CD, about 10 seconds later, it starts tospit the disk back out, but before it gets very far at all, it pulls it right back in. Does this 3 times and stops.  I can hear it doing the same thing, even with the faceplate closed.  Again, no error codes or anything. 

The faceplate is a little tight against a trim piece, I'm wondering if maybe it isn't closed all the way?  I'll pull the trim piece and try it.  Any other thoughts?