As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INPSECTION FOUND THE OVERHEAD AFT 12A CEILING EMERGENCY IDENTIFIER SIGN INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED OPS CHECK OF EMERGENCY EXIT SIGN. FOUND SIGN GOOD TESTED INVERTER FOUND TO BE BAD. REMOVED AND REPLACED THE EMERGENCY EXIT LIGHT INVERTER IAW EMB AMM TASK: 33-50-11-000-801-A, AND 33-50-11-400-801-A. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.