Hello and sorry you're having problems.
This is caused by a processor glitch, or a hardware failure within the Bose.
Please unplug the Bose system from power, then press and hold the power button on the system for 15 seconds and release. Then wait a minute and press and hold the Eject button while plugging it back in. Continue to hold the Eject button for 15 full seconds or until the disc ejects (whichever comes first).
If this does not work the first time, then try those same steps up to three more times in the hopes to force the system to reset and eject the disc.
If this does not work, then the player is in need of service- more specifically the Eject mechanism in the 3 disc changer has malfunctioned. In this case you would need to contact Bose Service, as they are the only ones that repair their systems:
For assistance with your product, please call us toll-free at 1-***-***-****. For help with our aviation headsets, call 1-***-***-****.
For the best possible service, please have your product nearby when you call. Hours of operation: Monday – Friday: 8:30 AM – 8 PM ET
If you need further assistance let me know. Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.