I have an '01 Camaro, with the factory installed CD player. Recently, my car's battery died, and after starting it back up, the AM/FM radio works just fine, but the CD player does not. It will not accept discs nor eject the one that is currently in there.

Anyone have any ideas what might be causing this? Thanks in advance.

(Monsoon AM-FM Stereo with Compact Disc Player and Automatic Tone Control)