[Glyn]

The scan laser LED will sometimes fail. The drive will open / close, but fails when it check to see if a disk is loaded. When it check to see if a disk is loaded the scan head will try to focus on the disk surface, but if the light is out it won’t ever find it.
If you check the manufacture site tech support, you might find some trouble shooting commands to send the drive to confirm.

Usually cheaper to replace the whole drive then fix.