As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON COMING CREW REPORTED TO MOC THAT ALL FLOOR EMERGENCY AND EXITS LIGHTS WOULD NOT STAY ON DURING PRE-FLIGHT CHECKS. BATTERY SWITCH WAS IN THE OFF POSITION NOTED BY CREW BEFORE EXTERNAL POWER APPLIED. EXT AC POWER WAS APPLIED AND EMERGENCY BATTERIES RECHARGED. NO HISTORY WITH THIS ISSUE ON THIS AIRCRAFT NOTED.