hi mate .i had the same problem.you have to change the ceramic capacitor(when its faulty it will be short circuit)when tested on the multi metre, which is orange situated on the right of the power supply board.Also changed the reservoir capacitor the biggest one near diode bridge>Discharged it .changed 3 capacitor near the capacitor 3300 uf(including 3300uf).please be carefull power supply is very dangerous if you dont know waht you are doing.email on rmarvin200@yahoo.com
Marvin
June 2007