Try to open by hand,see if the tray is stuck.
opening by hand is you turn the motor.
if you put a power supply direct to the motor the pcb will be burnt
(giving a bigger problem).
Look for mechanical problems.
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This does happen with CD trays, it's quite common. I can't remember the exact mot common cause, but it's some worn out part, such as a small (plastic) cog wheel. Search on "cd tray won't open" on the internet to find a multitude of reasons, most to do with computer CD trays, but I guess the mechanism is essentially the same. These may also describe ways round the problem.
Some CD players have a small hole on the front near the tray into which poking a straightened out paperclip should enable you to open the tray by a few mm, enough to be able to pull it open in an emergency - but it's awkward to do on a frequent basis.
The 5 disc carousel CD player has a belt driven mechanism in it. And after about 3-4 years the belt looses its tension and cannot push the tray in or out. If you keep your ears on the top cover and turn on the system you will hear a whirring sound coming from the inside which will prove my point. There are two belts in the machine. One for the eject mechanism and the other for disc change mechanism. One has to seek professional help to replace both because there is timing sequence also involved like the cam shaft of an engine.
hello the problem you have is that the tray is not in time so the security switch dont let to open this try to get ifo how put on time or align the mark on main spindle against the small one hope you undrstood saludos