What was found
CAPTAINS CDU (ACFT LEFT) WENT BLANK 2 TIMES (DARK SCREEN NO PRESENTATION). STAYED BLANK AT 5 SECONDS DISPLAYED "BIT TEST" IN YELLOW (+) ADDITIONAL DATA IN BLUE FOR LESS THAN A SECOND THEN RETURNED TO NORMAL DISPLAY. THIS OCCURRED WHILE NO INPUT /EXECUTION BEING PERFORMED WITH EITHER CDU/FMC. EXCEPT FOR THESE TRANSIENT EVENTS WORKED FINE. PERFORMED FIM TASK 34 61 00 810 804 FOR CAPTS CDU NO FAULTS FOUND. REPAIR CONFIRMATION SUCCESSFUL. NO HISTORY SEAMC NOTIFIED.