As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE COMING OUT OF PSU UNIT 26 CDE FOR 2 MINUTES, SMOKE THEN DISSIPATED. FOUND ONE SIDEWALL FLUORESCENT LAMP INOP AT ROW 26R. REMOVED PANEL AND INSPECTED SAME. RISIDUAL SMELL PRESENT WITH NO OTHER PROBLEMS FOUND. SUSPECT LIGHT BALLAST. FWD TO MCO AND PLAC. REINSTALLED PANEL. REPLACED BURNT BALLAST, LIGHT CKS GOOD. MCO/PLAC REMOVED.