What was found
AFTER TAKING OFF, THE PILOT REPORTED AN ODOR DESCRIBED AS A HOT, BURNING ODOR LIKE MELTING WIRES COMING FROM THE INSTRUMENT PANEL. NO SMOKE WAS ENCOUNTERED AND NO EMERGENCY DECLARED, BUT THE PILOT ELECTED TO RETURN TO DEPARTURE. TROUBLESHOOTING ON THE GROUND ISOLATED THE ISSUE TO THE WEATHER RADAR INDICATOR WHICH WAS NO LONGER POWERING UP OR DISPLAYING ANY INFORMATION, BUT WHEN POWER SWITCHED TO ON, A HOT ODOR WAS DETECTED. UNIT WAS REMOVED AND RETURNED TO REPAIR STATION FOR INVESTIGATION.