As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- -FLIGHT 3204, DURING PRE-FLIGHT INSPECTION THE CREW REPORTED THE EMERGENCY LIGHTS TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY LIGHT CONTROL MODULE, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.