As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A MAINTENANCE VISIT, THE OVERHEAD EXIT EMERGENCY SIGNAL THE LEFT EXIT DOOR WAS FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE BATTERY DEAD ON THE POWER SUPPLY AND REPLACED IT. SYSTEM OPERATION WAS NORMAL AFTER THE BATTERY WAS REPLACED.