As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE OFF ROLL CAPT'S ADI AND HSI SCREENS WENT BLANK WHEN AIRCRAFT ROLLED OVER IRREGULARITIES ON RUNWAY, DURING TAXI BACK TO GATE INSTRUMENTS WENT BACK TO NORMALCORRECTIVE ACTIONTHE EICAS COMPUTER AND LH SYMBOL GENERATOR WERE ADJUSTED ON RACK, ALSO WERE ADJUSTED AND CLEANED EICAS & EFIS DISPLY'S. IAW AMM 31-41-00 AND 34-22-00