While you wait for answers, we may have found some information which could help you.
Click here for Up Cd Player Helpunlock kdc-mp428?
Protect keeps coming up on my in-car cd player can you help?
Tape stuck. Won't eject?
setting the clock on a Kenwood KDC 122P player?
how can i fix my c.d./radio?
How to fix ATT error message on Kenwood car stereo?