As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 0645 - ON TAKE-OFF ROLL RECEIVED ECAM "AVIONICS VENT, AVIONICS SMOKE" MESSAGES. REJECTED TAKEOFF AND RETURNED TO GATE. MAINTENANCE TROUBLESHOT AVIONICS EQUIPMENT VENTILATION COMPUTER (AEVC) FAULT AND REPLACED THE AEVC COMPUTER PER TASK 21-26-34-000-001, OPERATIONAL CHECK WAS GOOD IAW 21-26-710-001.