CDs not playing. I have a Clarion DB328R radio/CD player fitted in my car. Radio works fine and

Question

I have a Clarion DB328R radio/CD player fitted in my car. Radio works fine and CD player will load CDs but just does not play them! Have tried resetting by removing DCP but makes no difference. Any ideas?!!My Radio is working buy my cd player wont, every time i put in a cd in says dosen't read and says TRAC FIN or something like that