As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVIONICS SMOKE MSG, RTFL CREW REPORT: AVIONICS SMOKE ECAM INDICATION BUT NO ACTUAL SMOKE. APPEARS TO BE FALSE INDICATION. OPENED AND INSPECTED THE AVIONICS COMPARTMENT, NO SMOKE AND NO DEFECTS NOTED. SUSPECT THE HUMIDITY CAUSED VISUAL EFFECT. RESET SDCU'S AND FWC'S. ALL CHECKS OK.