Custom built PC Power supply repair SM-800

[@motherboardrepairsPH]

Hi, buddy, my psu always shutsdown or restarting after a minutes underload, i opened it but no buldge capacitors, should it overheats components? Or where do you think component is faulty?

[@ninjatall15]

Your psu could be having over power protection, but i will wait to the this youtuber's response, if they even have time to review your comment.

[@motherboardrepairsPH]

@@ninjatall15 just want to add, my psu shutdown on full load, like when i was streaming or benchmarking ,something like that

[@FixTronics]

Hi friend Are you 100 percent sure its the power supply? Because it might be the CPU getting so hot and shuts down as a protection. If so check or reapply a fresh thermal paste and inspect the heat sink and fan for any blockage. If you are sure its the power supply then it might be of two reasons, One is one or more input/output capacitors is getting old and can't do its job anymore. Second is that it is thermally protecting itself form overheating. again bad capacitors can cause the circuit to not work properly and causes components to heat up ( like if the Mosfets are not getting driven correctly they heats up rapidly) Or it could be the cooling fan is failing and it doesn't blow enough air to the cooling ribs which causes the switching transistors to overheat I wish you all the best brother

[@pixellark3186]

Your diagnosis is appreciated, but this power supply is poorly built and not reliable.

[@FixTronics]

It isn't mine otherwise I'll just throw it away. Thanks brother