As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7743 - LAS TO LAX - FLIGHT CREW ABORTED TAKEOFF DUE TO SMOKE IN COCKPIT. THE AIRCRAFT RETURNED TO THE GATE WITHOUT INCIDENT, MX PERSONNEL PERFORMED ENG RUNS WITH FLIGHT CREW; OPERATIONALLY CHECKED PACKS AND AIR BLEED SYSTEMS WITH NO DEFECTS OR ODORS WERE DETECTED AND THE AIRCRAFT WAS APPROVED TO RETURN FOR SERVICE.