Computer(desktop) randomly crashed. Turns "on" for a second and turns off again.

fastandsimple

Reputable
Nov 9, 2015
1
0
4,510
CPU: i5-2500k (didn't OC) with hyper evo 212 installed
MB: ASRock LGA 1155 B75M-DGS
PSU: Corsair 600W (replaced by corsair few months ago after old one mysteriously fried)
GPU: R9 270x visiontek
120gb SSD (OS) & 1tb HDD
RAM: Kingston Hyper X Blu 4 GB 1600MHz DDR3 & another 4gb stick I forgot which one.

Around 3 weeks ago? This computer crashed on me once when I was playing a fairly light game (League of Legends). I didn't think much of it as it was, I believe, the first time it crashed on me unexpectedly. It was fine until yesterday, it wouldn't turn on. I would press the power button and it wouldn't respond. I held the power button for like 2 seconds and it would make starting noises (from PSU, I believe), but it would promptly turn off after a second or so. Monitor/keyboard/mouse did not light up. I kept trying this but same thing kept happening. I turned off PSU and on again to try; computer "powered" up for like 3 seconds and turned off again.

5 minutes later, I tried again, and it turned on again. I thought it was bizarre but didn't think much as it was working again, figured I'll look into it when it crashes again. Today, as I was about to leave and was playing another light game (Dungeon Defenders), it crashed again. I didn't try to turn it on again as I had to leave. What component is most likely the problem?

I bought GPU/CPU used around a year ago. They never gave me any trouble (unless they were the reason my PSU fried.. but I doubt it?). My PSU and MB were purchased new. I cheapened out on the MB which I honestly very regret as the MB actually doesn't turn off unless I turn it off manually by pressing the power button (monitor shuts off but fan keeps running). Because of this, I'm very suspicious of the MB, but I'm no MB expert, and the MB has been running fine for the whole year, so anything's possible I guess. So... my question is... which part is most likely the problem and how can I solve it (if I can; I can just replace it if necessary, I just want to know which part I have to replace).

I don't think anything particular happened on the day or before the day it crashed and showed problems. It got kinda chilly recently but that's about it lol (Texas woo).

Thank you for reading and I'll be home soon so if there's any more detail that's necessary, please let me know!
 

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