As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERG EXIT SIGN/LIGHT: REPEAT DISCREPANCY: DURING NORMAL POWER ON CHECKLIST, NONE OF THE EMER LTS WOULD COME ON WITH EMER LTS SWITCH IN ARM POSITION. MOST EMER LTS WILL ILLUMINATE WITH EMER LTS IN ON POSITION, EXCEPT FOR THE EMER LTS UNDER SEAT 10 AND THE TWO EXIT SIGNS AT THE BOTTOM OF THE MAIN ENTRY DOOR. REMOVED AND REPLACED #1 EMERGENCY BATTERY DUE TO EMERGENCY LIGHT SYSTEM INOP OPS CHECKS GOOD, ALL WORK DONE 1.A.W. CE-680A AMM CH 33-50-06.