Question PC turned on for a split second, now it wont turn on at all

Dec 15, 2019
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Ok so today when I pressed the power button on my case, the lights turned on and the fans started spinning for like half a second. After that it turned off. And when I tried again, nothing happened when I pressed the button. After that I tried with another psu cable and another plug but nothing. I did the paper clip psu test and the psu didnt turn on at all. So now im asking: Is that all I need to know, and the psu is the issue? Or is there any other posibility? Thanks
 

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