As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL PILOT'S PFD (DU NR 1) FAILED AT 40 KTS. EICAS MESSAGE CHECK DU NR 1 MESSAGE ILLUMINATED. TAKEOFF WAS ABORTED. INSPECTED AND FOUND PFD LOOSE IN SLOT. RESECURED PFD PER M/M 31-50-01 PFD OP CHECKS NORMAL, A/C OK FOR SERVICE.