What was found
ON DESCENT, PILOT SIDE PFD, MFD AND CDU DISPLAYS STARTED TO HAVE A WAVY APPEARANCE. MASTER CAUTION AND MASTER WARNING LIGHT STARTED TO FLASH, BUT NO CORRESPONDING ANNUNCIATOR. TCAS AND ATC 1 BREAKERS POPPED ALONG WITH PILOT SIDE PFD TURNING OFF. COPILOTS PFD BEGAN TO FLICKER ON AND OFF ALONG WITH BOTH CDUS. SDU 2 STARTED TO TURN ON AND OFF UNTIL SDU2 CIRCUIT BREAKER POPPED. LEFT CDU WENT OFF AND LEFT FUEL GAUGE WENT TO ZERO. LEFT EFC ANNUNCIATOR CAME ON ALONG WITH L GEN, ICE DETECT FAIL, PITOT HEAT OFF, AND ANTI SKID FAIL.