What was found
AFTER LEVEL OFF, FUEL GUAGE ON CDU WENT BLANK. NO LEFT, CENTER, OR TOTAL INDICATION. DISPLAY RETURNED 1 AT A TIME AFTER 10 SECONDS. RT DISPLAYED NORMALLY AND DID NOT GO BLANK. FUEL QTY INDICATORS BLANKED AGAIN SEVERAL TIMES IN FLIGHT. ACFT GROUNDED. PROCESSOR FAILED, 17 OF 24 LEGS. REPLACED FQPU. OPS CK NORMAL, REF FIM 28-41, TASK 808.