What was found
AT OAK AS POWER WAS BROUGHT UP FOR T/O, GOT A NR 1 REV UNLOCKED LIGHT, HAD NOT YET TOGA'S. REDUCED POWER AND REJECTED T/O. TAXIED BACK TO NR 1, RAN UP ENGINE NR 1 AS PER MX CONVERSATION, NO LIGHT. THEN TOOK OFF UNEVENTFULLY. DID NOT RETURN TO GATE. ENGINE 1 THRUST REVERSER INOP.