As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7729 IAD TO IAH DURING TAKEOFF ROLL CREWS EICAS SCREEN WENT BLANK, THEN ALL WENT BLANK DURING REVERSION. CREW ABORTED TAKEOFF AT ABOUT 80KTS. NO INJURIES, TAXIED BACK TO THE GATE. IAD MX COULD NOT FIND ANY FAULTS AND ALL DISPLAYS WERE WORKING WHEN THE A/C GOT TO THE GATE. CYCLED A/C PWR AND FHDB AND DVDR WAS DOWNLOADED.