Onkyo CD player is stuck closed:

Hi, my Onkyo C-707CHX 3-disk CD changer is stuck:
none of the 3 disk trays will open when I push the open button; a “whirring” sound just comes out. I don’t see any emergency release on the back or sides. I’ve tried unplugging and replugging it.:sad:
Can you help please? I could unscrew a few screws holding the front on…
Thanks; I hope I’m putting this question in the right spot, please let me know. Charles

maybe this helps?