As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERG LIGHT: OVERHEAD EMERGENCY LIGHT ABOVE SEAT 10 INOP. // SIGNOFF// POWERED UP A/C AND UNABLE TO VERIFY DISCREPANCY. REQUESTED A/C INTO HANGAR. CONNECTED GPU TO AIRCRAFT AND CHARGED BATTERY PACKS. PERFORMED OPS CHECKS GOOD AND OPS CHECKS GOOD. RECONNECTED GPU AND CHARGED BATTERY PACKS BACK UP. ADVISED MCC AND CLOSED UP A/C. WORK DONE IN REF CE680A MM 33-50-00.