What was found
IN CRUISE FLIGHT AT FL 350 FIRST OFFICERS FLIGHT DIRECTOR PITCH 342 DISAPEARED FROM VIEW. THEN HAD INTERMITTANT MAP ANNUNCIATOR ON F/O NAV DISPLAY AND EVENTUALLY AN INTERMITTANT VTK ANNUNCIATOR ON F/O ND AND SINGLE FMC OPERATION ON FMC CDU SCRATCHPAD. IAW CHECK LIST MOVED FMC NAV SWITCH TO BOTH ON L FOR 1 MINUTE, THEN BACK TO NORMAL. ALL F/O DISPLAYS RETURNED TO NORMAL BUT EVENTUALLY HAD NUMEROUS MAP ANNUNCIATORS ON F/O ND. RETURNED FMC NAV SWITCH TO BOTH ON L FOR REMAINDER OF FLIGHT. ON TAXI IN, RECIEVED A STEADY SINGLE FMC OPERATION ON FMC CDU SCRATCH PAD. ACFT GROUNDED. FOUND RIGHT FMCS BITE INOPERATIVE, CYCLED ACFT POWER ACCOMPLISHED FMCS OPS TESTED IAW AMM 34-61-00 GROUND VERIFICATION SUCCESSFUL.