[Urgent] PC turns off after 1sec

Myntekt

Distinguished
Aug 7, 2013
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Hello..
I was playing a game and then left the PC, without closing the game/turning the PC off. When I got back the PC was turning itself on and off over and over again (I don't know for how much time) and it's still happening but I don't know what to do.
I changed the PSU 2~3 months go and nothing happened since then, so I guess that's not the problem.
Earlier today I disconnected all the cables (keyboard, mouse, headsets...) and connected them again because they were all messed, and the Jack 3.5mm cables where giving me shocks (not sure why or if this can be related to the problem, just wanted to point that out.

I already tried to turn the PC on without anything connected to it and it didn't work.

What should I do?
Thanks..
 
Just tried to turn it on again and it worked. It didn't load windows and said overclocking could not be done or something like that and to run default values. I overclocked it to 4.3Ghz almost a year ago and never had any problems..