What was found
TAKEOFF PLUS 2 HOURS PRIOR TO ETOPS AIRSPACE ENTRY, UPPER EICAS FAILED, PRIOR TO FAILURE, FLICKERED REPEATEDLY. PERFORMED FIM 31-41-00, FIG 103. NO FAULTS NOTED. RE-RACKED EICAS COMPUTER, OPS CHECKED NORMAL. SWAPPED UPPER AND LOWER EICAS DISPLAY PER COMPANY REQUEST, OPS CHECKED PER MM 31-41-01. OPS CHECKED NORMAL.