As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, CENTER ENGINE UPPER AND LOWER CRT'S FLASHED BLACK, THEN BACK ON AND NORMAL, 7+ TIMES DURING FLIGHT. ALL OTHER INDICATIONS NORMAL, BOTH FLASHED TOGETHER. T/S PER FIM 31-41-00 FIG 104, 105. REMOVED UPPER AND LOWER DU'S CHECK COOLING. NO FAULTS FOUND. AFTER T/S AND A/C POWER UP UPPER DU FAILED TO DISPLAY. FOUND BAD PIN ON UPPER DISPLAY SW MODULE M10417. REMOVED AND REPLACED DU'S PER AMM 31-41-01-004-001/404-002. REMOVED AND REPLACED CONTROL MODULE PER AMM 31-41-04-004-001/404-001. PRFD EICAS BITE OPS PIN CK OK.