THE REASON ARE RETACE CAPACITOR ON THE COLLECTOR OF HORIZ-OUTPUT TRANSISTOR WITH MARKING 1.6KV.MOST MICKEY MOUSE TECH DONOT KNOW OR DONOT CARE LAZY TOO!I HAVE SEEN THIS PROBLEM MANY TIMES.ALSO ELECTROLYTIC CAPACITOR DETERIORATE CAUSING FAILURE OF POWER SUPPLY. IF YOUR HAVING TROBLES I WILL BE HAPPY TO HELP YOU VIA EMAIL..I NEED MODEL NUMBER AND CHASSIS MUMBERS...REASON BEING THAT MICKEY MOUSES BACK TO DISNEYLAND..FOR ALL THE HONEST TECHS WE ARE TO SERVE TO PUBLIC BETTER