The power supply turns off after a while, how to fix it?

Question

Power Supply

Computer turned off. To check what was wrong, I took the power supply unit and connected the green and black wires, it moved for a second, then got up again, in order to start it after such a spontaneous shutdown, you have to connect the contacts (black and green) many times until the cooler starts up, in what could be the problem??

Answer 1

The PSU goes into defense or cannot start up and ... well, in general, it also goes into defense. A possible and common cause is the failure of electrolytic capacitors - replacement solves the problem completely.
It does not look like a problem with the PWM controller in terms of symptoms.

Answer 2

The most logical option is overheating or the PSU does not draw iron. Not enough power. Another option is large overloads in the outlet

Answer 3

The protection works. KZ somewhere with you.