What was found
SEA - ON FLIGHT NUMBER 2385, TAKEOFF WARNING DURING POWER UP FOR TAKEOFF. TAKEOFF ABORTED. TAKEOFF WARNING WAS CHECKED AFTER BRAKE RELEASE PRIOR TO TAXI AND NO TONE WAS HEARD. ALL TAKEOFF CONFIGURATION ITEMS WERE RECHECKED FOLLOWING ABORTED TAKEOFF AND NO DEVIATIONS OR ABNORMALITIES FOUND. TAKEOFF WARNING WAS RECHECKED AFTER CLEARING RUNWAY AND WARNING TONE DID NOT SOUND AGAIN. REMOVED AND REPLACED PARK BRAKE QUADRANT. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.