How to repair desktop smps power supply for dell OptiPlex pc

[@DaimondRus]

So, why the PSU not starting from button, but starting from connect PS-ON and GND on 24-pin?

[@rohanranjandesilva465]

Good explanation thanks

[@koecienkgantenk2438]

Sir...what is the value of the C39 capacitor next to the 280pg IC

[@rohanranjandesilva465]

What is is the fault in stand by voltage 2.5 v not present 5v

[@noorul-varanoorul-varaisla1599]

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