As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, RECEIVED (SMOKE DR5 REST) MESSAGE ACCOMPANIED WITH AN EICAS AND MASTER CAUTION. AIRCRAFT ABORTED TAKEOFF AT 75 KNOTS AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. REPLACED THE P24 PANEL AND 4 CREW REST SMOKE DETECTORS. OPERATIONAL CHECK GOOD.