Kenwood CD players are easy to troubleshoot. What might seem like a malfunction is often just a case of mis-operation, or settings not being specified correctly. In particular, take into account that CDs can get scratched or suffer heat damage in hot cars. It’s always a good idea to run through some troubleshooting steps before calling for service.
Make sure the CD is of a type the Kenwood will play. Kenwood CD players will play CD-R/RW/ROM. The CDs must be round and not an unusual, special shape.
Check that any optional multiple disc changer connected to the device has the “O-N” switch set to the “N” position.
Clean the disc if the disc won’t play, and visually inspect it for severe scratches. If it still won't play, but other discs will, you'll know you have a problem with the disc, not the player.
Make sure the disc is loaded into the proper slot. Eject the magazine from the CD changer and check the number for the disc.
Clean the CD if the sound skips when an audio file is being played. If that doesn't work, there may be a problem with the recording itself, while it was being transferred to the disc. Try re-recording the file to a new disc.
Reinsert the CD if the "CD-IN" message on the screen blinks. Other error messages to check out are: “Unsupported File,” which means the recorded media isn’t of a format the CD player can read, and “Error 99,” which means the disc magazine is malfunctioning (you might be able to fix this by reinserting the CD and pressing the reset button on the unit). “TOC Error” means either no disc has been loaded into the magazine, the disc is upside down, or the disc is badly scratched.