What was found
ENROUTE, FUMES WERE DETECTED IN THE COCKPIT, FIRST OFFICER HEARD A SIZZLEING SOUND AND THE WX DISPLAY FLAG APPEARED ON THE CAPTAIN`S AND FIRST OFFICER`S EADI. RADAR WAS TURNED OFF AND FUMES DISSEPATED. CHECKLIST FOLLOWED. EADIS LOST COLOR, ACCOMPLISHED A WX RADAR CHECK IAW 34-43-00-735 & 34-43-00-715 NO DEFECTS NOTED, NO FUMES DETECTED, DISCREPANICES WERE DUE TO A FLT DECK FAN FAILURE. CHANGED THE FAN. OK FOR SERVICE.