My PC turns on and off by itself repeatedly

matias.2234

Prominent
Aug 24, 2017
1
0
510
Just to get a bit of context into the problem. I was gaming until 2am, everything was right. I turned the PC off. Two hours later my PC randomly turns on and after 2-5 seconds it turned itself off. It kept doing that until I switched off the PSU. The power button didn´t work.
I checked the connections and cleaned the PC. However, as soon as I turn on the PSU (not even the power switch) it starts doing the same cycle again.
I am not sure if its a PSU or MOBO problem and I dont have any replacements to troubleshoot.
Any advice?