As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN EMERGENCY LIGHT CHECK FAILED. FAULTED EPSU COMM FWD L AND EPSU COMM AFT L. *S/D* DURING THE OPS CHECK OF EMERGENCY LIGHTS THROUGH THE PROGRAMMING AND TEST PANEL (PTP), NO SMOKING SWITCH 190RH WAS INADVERTENTLY SET TO THE ON POSITION. IT WAS SUPPOSED TO BE IN THE OFF POSITION PER AMM TASK 33-51-00-710-001.