As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THEY RECEIVED AN EMERGENCY LIGHT NO ARMED EICAS MESSAGE WITH THE EMERGENCY LIGHTS IN THE ARMED POSITION DURING PRE-FLIGHT INSPECTION. MAINTENANCE RESET THE AIRCRAFT'S POWER. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.