LCD SMPS help

mugametal

Member
2006-06-11 10:19 pm
hi, im trying to repair PSU of my LCD monitor. It does not power up. i checked the board and found one mosfet(stp3nb80fp) was fried up. i replaced it with sss5n80. but still theres no power. does anyone know how the switch on of SMPS work? and how to determine if the driver IC is bad?. I cheked the gate of the mosfet and its getting huge DC value, shouldnt it be AC current. The driver IC seems to be TY72011P2 and i cant find the datasheet anywhere, please help