I opened it up yesterday, and manually worked the mechanism to get the cage inside to move up and down, and the CD-tray to come out.

I then plugged in the power cord and tried to start it up to see where it goes wrong.
But, it worked like a charm…
I tried about 30 times, ejecting the LD-tray and sent it back in, and it worked flawlessly every time.

Tried again this morning several times, and it still works…

Ok then, case closed, for now.. 🙂

I am still thinking of getting a new belt for it, just to prevent failure in the future.