A B757-200 WITH AUTOTHROTTLES DEFERRED CREW NOTED THE THRUST MGMNT COMPUTER WAS ALSO NOT WORKING. THE STEP TO REACTIVATE THRUST COMPUTER WAS NOT IN THE MEL PROCS.

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THE AUTOTHROTTLES WERE DEFERRED AND WE SPOKE WITH THE MECH WHO TOLD US THAT ALL THE ITEMS IN THE MEL HAD BEEN COMPLIED WITH REGARDING THE DEFERRAL. WE WENT OVER THE ACTIONS THAT HE TOOK AND VERIFIED THAT ALL THE CORRECT PROCS WERE FOLLOWED ACCORDING TO THE MEL PAPERWORK; AND THEY WERE. WE USED MANUAL SETTING FOR TKOF AND HAD A NORMAL DEP. ENRTE AFTER LOOKING IN THE FLT MANUAL WE REALIZED THAT THE TMC (THRUST MGMNT COMPUTER) WAS NOT OPERATING; BUT SINCE THE CIRCUIT BREAKER WAS PULLED FOR THE SERVO IT SEEMED SOMEWHAT LOGICAL THAT THIS COULD BE POSSIBLE. AFTER FURTHER DISCUSSION AND RESEARCH WE CONCLUDED THAT THE WRITE-UP AND THE ACTUAL PROBS DIDN'T MATCH UP. WRITE-UP SAID WE WERE SUPPOSED TO HAVE NORMAL EICAS READINGS; BUT DIDN'T IN REGARD TO TMC READINGS. AFTER LNDG I CALLED MAINT AND SPOKE WITH SOMEONE WHO WAS AWARE OF THE MEL AND HE VERIFIED WITH ME THAT WHAT WAS DONE IN THE WRITE-UP AND ACTIONS WAS CORRECT ACCORDING TO THE MEL WRITTEN PROCS. HE THEN WENT ON TO STATE THAT IF WE WANTED THE TMC TO COME BACK ONLINE WE WOULD HAVE HAD TO RECYCLE THE CIRCUIT BREAKER FOR THE SERVO AFTER STARTING ENGS AND THEN PULL AND RECAP THE CIRCUIT BREAKER. THAT PIECE IS NOT WRITTEN IN THE MEL DESCRIPTION OF THINGS TO ACCOMPLISH. MAINT CTLR SAID THAT HE HAD BEEN TRYING TO HAVE THE MEL PROC CHANGED BUT THAT IT HAD NOT HAPPENED YET. THE PROB IS THAT WE FLEW THE ACFT WITH AN INOP TMC BUT COULD HAVE HAD USE OF IT AND THERE WAS NO COMMENT IN THE MEL TO RECYCLE THE CIRCUIT BREAKER TO MAKE IT WORK.