As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER CDU DISPLAY BLANK. CIRCUIT BREAKER CYCLED AND CENTER CDU DISPLAY BACK TO NORMAL MOMENTARILY AND THEN WENT TO BLANK AGAIN. SWAPPED CENTER CDU WITH LT SIDE, SCREEN DISPLAYED, REINSTALLED CDU'S IN ORIGINAL LOCATIONS. REPLACED THE CENTER CDU.