I had my pc open on a game and went away from it for about 20 minutes and when i came back my keyboard lights and mouse light was off and my screen was off. i tried waking my screen up but it wouldnt come back on so then i tried reseting my pc and it wouldnt reset so then i tried turning it off and it wouldnt turn off so i waited a couple minutes and tried again and it still wouldnt turn off. So i turned it off by turning the psu off then i tried booting it back up but my psu didnt turn on and my light on my graphcis card was gone so i left it for a while and i came back and tried again but nothing booted up. So i opened up my computer and i smelt a ozone smell for a couple seconds then it went away. i looked for any damage on everything and there wasnt any. I looked up how to test psu and done the test with a paperclip and my fan in my psu started up so i thought it was my motherboard but i read that using the paperclip doesnt mean its your psu. so i dont know whats actually wrong with my computer, if anyone could help thatd be good and nothing turns on at all its completely dead.