Won't open...

Hey this is a great site!
I was having a similar problem with my Toshiba SD-K860. Bobbyj, thanks for the link to the SD-4900 service manual, it was extremely helpful even though it was a different model. I could not find an emergency eject pinhole, and leaving the unit unplugged for a while did not help (two suggestions found on other sites), so I simply took the whole thing apart, got the disc out, found the eject slider on the bottom of the tray, massaged the tray open and closed, and put everything back together again. The connections were solid and the belt was in tact so everything seemed to be fine. Once I reassembled and powered it back up it worked again!
I posted a more detailed solution on my problems to solve site, which is similar to this one:
http://problemstosolve.com/solved/toshiba-sd-k850-wont-eject-solved/

the door drive belt is most likley broken this belt is on the inside under the door. the part number is 79096669. the service manual is here https://www.vancebaldwin.com/shop/research_new/TBA/SD4900.pdf

Hi,

try this:-
Power On, then push eject several times, whilst applying a slight pressure to the left and right hand sides of the Drawer.
If the drawer has jammed, i,d suggest using A Blunt Knife ( Butter Knife et,c ) and gently prising the top corners of the drawer, whilst pushing eject/open on the remote or control panel.
If all else fails, dismantle the drive. And remove the disk manually.

Mike @ compurepair.