As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED, EMERGENCY EXIT SIGN ILLUMINATED CONTINUOUSLY WHEN NO SMOKING LIGHT SWITCH WAS ON AND DISPLAYED DISCREPANCIES. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38 AND PERFORMED SATISFACTORY EXIT SIGN LIGHT OPERATIONAL CHECK.