Unfortunately its not worth fixing. I had the same problem with my old Kenwood changer. It has something to do with the magazine intake. If I remember correctly I was quoted a little over one hundred dollars to fix it. With changers so cheap and so much better then back then I would just by a new one.
HU: Kenwood CD w/ Kenwood Chg
FRONTS: Kenwood DB+ Excelon 2-way 6.5"
REAR: Kenwood 3-way
MID/HI AMP: 400x4 Fosgate Punch
SUB: 12' Kicker VR
SUB AMP: 250x2 Fosgate Punch
**Soon to come... anything but those front Kenwoods, possibly Infinity Perfect Seperates