What was found
COPILOT'S MFD WENT BLANK & RELEASED SMOKE. SHOWS UP AS WHITE ON FIRE FIGHTER'S THERMAL IMAGING CAMERA. OCCURRED ON DESCENT. FLIGHT COMPLETED AS FILED. IFE DECLARED ON APPROACH TO KAPC. LANDING UNEVENTFUL. UPON FURTHER T/S, FOUND COPILOT'S PFD TO BE MALFUNCTIONING. REMOVED COPILOT'S PFD & INSPECTED AREA FOR HEAT DAMAGE, NONE FOUND. INSPECTED OTHER THREE SCREENS FOR HEAT DAMAGE, NONE FOUND. REPLACED COPILOT'S SIDE PFD WITH O/H UNIT. PERFORMED OPS CHECK, OPS CHECK GOOD, NO DEFECTS NOTED.