When the CD Drive is ill.
Sometimes the CD drive (which was used at a level where it would cry to leave a vacation if it had eyes) will have problems in the movement of the tray in and out of the drive. Either the insertion of the tray won’t work properly or the tray won’t accept the command to come out. For the former issue of disobedience shown by the Drive, we usually use our hands to guide to the tray inside by just pushing (carelessly). But for the latter case all thing that is to be done is to use a pin or something thin and sharp like needle that can be inserted in the front panel of the Drive (usually below the CD tray). On inserting this, the CD tray will eject the CD-ROM just like that.