Harman Kardon FL8350 5-Disc CD Changer "fl error" Questions

FL 8350 CD Player. Disc drawer will not open. Getting error message Disc drawer will not open. Getting error message Most likely a belt has stretched and will not now move the tray. This happens of ...

FL 8550 will not play, the display shows error and the carousel seems stuck. I already cleaned the lens. Couple possibilities. Disc jammed inside, take cover off and inspect. Worn belts, belts are old