15" Monitor Power Supply

[luckstar]

I will appriciate your help..
I am trying to repair my 15" Monitor. This is my first try to repair Monitor,
I have know how of electronics and can repair Car Taps, Decks, Cell phone Charger Etc.

I started from Input 220v . At Capitor it Show 250v DC and at input SMPS Transformer it shows 250v and 300v but at Output it Zero 0v.

then i unplug a Divode which is conected pin#8 to 6 at out put.
Now the Power LED is blinking and Transfomer make noise Tik Tik >>tik


I just want to know where the problem is ?
Before Transformer , Bed Transformer or after Transfor.

Thanks in advance

[jts1957]