Hi, I recorded a very important concert on my Sony MZ R 50, when the concert ended i noticed that the MD is still recording, i stoped the recording and i didn't notice if the MD did operate the TOC Saving/Closing. anyway, later, i tried to play the media and the MD wrote me (as you guess) "Blank Disk". i made a little research thru forums and i got the Sony MD Deck - MDS-JB940, i have also the manual and the service manual PDF, and i tried everything... It Doesn't work, i guess i don't realy know what to do exactly in the "service mode". I need your help, Sincerely, Oren.