HiCustomer what they are talking about in the manual is to press setup then press 2,0,0,5 in that order, however, I do not think it is locked for that reason. Your unit appears to have a hardware fault internally. It sound like the motor for the door is bad or if it uses a belt to drive a gear, that may be slipping or broken. You may also try to unplug it, then plug it in and immediately press the eject button. If you are not comfortable taking it apart and looking for the motor that drives the tray, your only option may be to take it to a shop or buy a new one. Buying a new one may be the best option over having it repaired. If I have answered your question to your satisfaction, please click accept and feel free to ask follow-up questions as well. I hope I have been helpful.
Hello, thats great!! I hope it keeps working. If just taking it apart and putting back together fixed it, then yes it probably needed the connectors to be reseated. As a servicer, I hate when that happens because you know there was a problem and now you can't replicate it and don't know if it is fixed or will come back. Sometimes it does and sometimes it doesn't.
Best wishes and Happy Holiday,