Additional info: the power led blinks when it shuts off. Pressing the power or reset button does nothing. I have to turn off the psu or unplugged it to turn it on again. Sometimes it doesn't work and for like a couple of mins it just turns on by itself.
not turning on for 5 min sounds like a power shortage or a shortcircuit
You might be right because the other outlet has a power bar with all of it's outlet used but when it shut off everything else in that power outlet was still working.
have you tried to put the plug in the wall?
It's directly plugged in the wall.