What was found
FLT.514 FROM KBWI TO KROC. ON FOURTH (4TH) LEG OF THE DAY''S OPERATION, WEATHER (WX) RADAR WAS TURNED ON BUT DID NOT OPERATE NORM. THE DISPLAY SCREEN WOULD NOT PAINT ANY WEATHER, GROUND OR RADAR SYMBOLOGY. IMC CONDITIONS WERE IN EXISTANCE ALONG ROUTES OF FLIGHT INCLUDING EMBEDDED LEVEL 4 CELLS. ACCORDING TO WEATHER REPORTS, PILOT REPORTS, ATC REPORTS, AND THE ALTERNATE (KSYR) WAS NOT SUITABLE NOR WAS THE DESTINATION LOOKING TO IMPROVE FOR SOME TIME. CAPTAIN DECIDED TO DIVERT AIRCRAFT TO KBUF WITHOUT FURTHER INCIDENT. FOUND FUZZ AND HAIR WRAPPED AROUND PINS ON RADAR INDICATOR. REMOVED FOD, TESTED SYSTEM IN ACCORDANCE.