Sony CMT - CP555 cd drawer will not open. All 5 are affected, no release hole.

SOURCE: CD player is locked

Hell Yes!!!  Thanks my friend - I haven't been able to use this thing for about 6 months.... You da man!

SOURCE: CD drawer won't open

hi, try opening up the cover lid, and manually give a mild push to the tray, must be some small jam, or the eject belt or gear,.let me know

SOURCE: toshiba sd-3990 Disc-drawer won't open

I was given one of these the other day. I was told the drawer wouldn't open yet the machine seemed to function fine. I removed the six screws holding the top on the box and then removed the four screws holding the drawer assembly in place. As you lift the drawer assembly out of the box, make sure you release the two pieces of black retaining tape holding the data cable to the box floor. Turn the drawer over and you will see that there is a little sideways bar mounted on the front underside of the drawer assembly. This is sticking. As you press the OPEN button, jiggle this bar and the drawer will open. You may have to manually move the drawer cogwheel a little to help free it up. Hope this helps.

SOURCE: cmt-ed1 sony

If you mean the CD spindle hub, not the stabiliser. Then you can buy the PlayStation 1's CD spindle hub  (plenty, just google with keyword ‘Playstation 1 spindle hub’ and you will see)  to replace it.
Just push in the new spindle hub, not too close, not too far, from the laser head.
I did, it worked.

SOURCE: Internal CD ROM will Not Open

Unless you can do electronic repair yourself and have the schematics for the drive it will be far cheaper and easier for you to simply replace it. Any DVD drive for computers will fit in there. I would buy a new one rather than used so you make sure and get the software with it. Replacing the drive is a 30 minute job at most.