I suggest that you remove the top cover and take a good look at the rack and pinion gears that move the door, usually made of white Nylon.
They may need lubrication; use white lithium grease only, any other oil or grease will "eat" the nylon gears.
Or there may be be a few teeth missing, a common failure when a CD gets stuck. The gears are usually available as spare parts.
Also make sure that the magnetic clamp on top of the CD gets disengaged when the door starts opening. It is lifted by a lever and cam mechanism.
Good luck!
They may need lubrication; use white lithium grease only, any other oil or grease will "eat" the nylon gears.
Or there may be be a few teeth missing, a common failure when a CD gets stuck. The gears are usually available as spare parts.
Also make sure that the magnetic clamp on top of the CD gets disengaged when the door starts opening. It is lifted by a lever and cam mechanism.
Good luck!