Question PC lights up for half second then turns off

[Trevor06]

I woke up this morning to jump onto my computer and play some Valorant. I went to turn it on and it wouldn't turn on. I had this problem a few years ago with one of my old computers. So I turned off the PSU and unplugged it as well. I went to get some coffee and give it a few mins unplugged, I come back into my room to plug it back in and when I did, the CPU cooler lights lit up but then turned off after a second later. I tried repeating this step but still, nothing.

I recently built a new computer (3 weeks old)

i7-9700k
ASUS ROG STRIX Z390-E GAMING
G.SKILL 16GB 2X8 D4 3600 RIPJAWS
GTX 1060 3gb
PSG 850W GOLD FULLMODULAR PSU
1TB Harddrive + 500gb SSD

The only thing I didn't buy new was my GPU. Its from my old computer, ill upgrade it in the future.

I bought the parts from my local MicroCenter and was wondering if I could get some of your opinions. I contacted the live support and he believes its either the Power Supply or Motherboard. Im really hoping for it to be the PSU because its still under store warranty, hehe

If you could give your feedback or maybe even a possible solution, that would be awesome

 

[Grobe]

This is most probably the PSU that is broken.

 

[Trevor06]

This is most probably the PSU that is broken.

Thanks for the reply, Im honestly hoping it is because I can still get a refund / replacement on it with the warranty as the motherboard I cannot.