hi man ..
i have a break down Computer SMPS i am trying to repair it so
when i connect the 12 volt to series load the Power supply immediately shutting down
can any one help me

 

Yes, chuck it in the bin and buy a new one, unless you have a circuit diagram for it or the patience of a saint to repair it, don't bother.

 

Yes, chuck it in the bin and buy a new one, unless you have a circuit diagram for it or the patience of a saint to repair it, don't bother.

i did that really but that fault occurs more and more in other PSs, i thing it could be a simple fault .
Would you please tell me if you have an idea about the element caused this fault

 

It sounds like overcurrent shutdown, have you measured the current it can take before it shuts off?

 

hi man ..
i have a break down Computer SMPS i am trying to repair it so
when i connect the 12 volt to series load the Power supply immediately shutting down
can any one help me

Connect a 10Ω, 10W resistor across the +5V output and try again. This prevents the 5V supply going too high and tripping the overvoltage circuit.