What was found
SEA - ON FLIGHT 2380, RETURNED TO GATE, FLAP POWER CAUTION AFTER START AND SELECTING TAKEOFF FLAPS -0 -15. COMPLIED WITH ABNORMAL CHECKLIST AND CIRCUIT BREAKER FLAP CONTROL RESET, SAME RESULT. MAINTENANCE INTEROGATED CDS AND FOUND ECU POWER ON BIT FAULT, CLEARED FAULTS, GROUND RAN ENGINE AND CYCLED FLAPS NUMEROUS TIMES WITH NO FAULTS NOTED. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.