What was found
ON ARRIVAL THE LOWER EICAS SCREEN BLANKED AND EICAS DISPLAY CAUTION ILLUMINATED. SHORTLY AFTER DETECTED A MILD PUNGENT ODOR IN THE COCKPIT. LANDED AND PERFORMED SMOKE FUME CHECKLIST. ODOR DISSIPATED BUT THEN RETURNED ON TAXI IN, SHUTDOWN UTILITY BUSS SWITCHES. EQUIP COOLING ALTERNATE LIGHT ON AND SELECTED ALTN EQUIP COOLING. E/C OVERHEAT LIGHT ILLUMINATED. REPLACED LOWER CENTER EICAS DISPLAY UNIT IAW AMM 31-41. VERIFIED ODOR COMING FROM UNIT-OPS CHECKS NORMAL.