As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT 2139, EMERGENCY LIGHTS IN CABIN FLICKER AFTER TAKEOFF. TURNING OFF THEN ON, ARM STOPS THE FLICKERING. LIGHTS FLICKERING ARE THE EXIT SIGNS AND OVERHEAD. MAINTENANCE REMOVED AND REPLACED PS3 AND PS4 POWER SUPPLIES AND BATTERY PACKS. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.