Error???

Hi,

The radio is out of a 2000 Celica, the model number is 86120-2B680.
I got it all wired up in my 83 and it worked great for about 10 minutes, and then the player came up and gave an error 3. What does error 3 mean? Now it won't do anything at all, it won't eject the cd and the radio doen't work either it's completely dead!
HELP whats an error 3??

Thanks,
Gr8ride.