As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT NOTICED SMOKE BY SEAT 19A. PASSENGER STATED SHE NOTICED SMOKE AFTER AN OVERHEAD SIDWALL LIGHT WENT OUT. AFTER TROUBLESHOOTING SYSTEM A BAD BALLAST AT ROW 19 LEFT FOR THE LOWER SIDEWALL LIGHTS. REMOVED AND REPLACED THE BALLAST SYSTEM. OPERATION CHECK WAS GOOD.