As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH THE EMERGENCY LIGHT KNOB IN THE ARMED POSITION, EMERGENCY LIGHT NOT ARMED CAS MESSAGE DISPLAYED AND CABIN EMERGENCY LIGHTING IS ILLUMINATED. COMPLETED A POWER CYCLE ON THE ACFT AND THE FAULT REPEATED. REMOVED AND REPLACED FWD EMERGENCY BATTERY DUE TO EMERGENCY LIGHT NOT ARMED CAS MSG . WORK DONE IAW AMM 33-51-01. OPS CHKD EMERGENCY LIGHTS GOOD.