As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT INSPECTION THE FLIGHT CREW REPORTED THE EMERGENCY LIGHTS AT ROW 18 AND 23 INOP. MAINTENANCE INSPECTED AND FOUND PLUG TO INVERTER DISCONNECTED. MAINTENANCE RECONNECTED THE PLUG TO THE INVERTER. SYSTEM OPS CHECKED GOOD.