As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE OPS CHECK OF EMERGENCY LIGHTS, FOUND MAIN DOOR EMERGENCY LIGHT AND PASSENGER ENTRY EMERGENCY LIGHT FAILED TO ILLUMINATE. AIRCRAFT REMOVED FROM SERVICE. DURING TROUBLESHOOTING, PIN "D" ON CONNECTOR P8011 WAS FOUND TO BE NOT SEATED FULLY. SEATED PIN, OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.