As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE R/H UPPER DECK DOOR "OKAY" INDICATOR LIGHT ON THE SECONDARY EICAS DISPLAY IN THE FLIGHT DECK WOULD NOT ILLUMINATE. INDICATOR LIGHT EXAMINES THE EMERGENCY EXIT BATTERY CONDITION. SYSTEM OPERATES NORMALLY - INDICATOR LIGHT DEFERRED PER B747 MEL 52-23-07-01.