computer randomly turned off and will not turn back on

[ImGeil]

there are already a few of these on the internet but mine is somewhat odd. so i was on my computer last night and everything was normal, nothing out of the ordinary. then i tried to launch counterstrike global offensive and my computer just turned off immediately. i tested if everything was plugged in etc and still no turn on. i am not currently able to test stuff but i think the problem is coming from the motherboard because of how abrupt the turn off was and that there were no signs of the psu dying before. what do u think the issue is?

comp specs:
i5 4670k
2 x 4 gb corsair vengeance ram
z87 g43 mobo
corsair tx650m 650w psu

edit:
i didnt smell burnt plastic (although i didnt really get close to my psu sooo)
and i didnt hear a beep at all. my computer just turned off.
i will be testing my power supply in a bit

 

[Outlander_04]

Is the psu fan spinning when you power on ?

 

[ImGeil]

no my psu fan isnt spinning

 

[SherbetAddict]

Maybe the power supply was fried but you should take a look first.

 

[Aran Klair]

Maybe the 20 pin power connector was loose?