Newish computer

[JetCrazy]

Hello, so around last week of December i built my computer. Everything worked fine. I was using it for about a week with 1 of my sticks working tried to switch them and it didn’t work again. I then realized it wasn’t intel ram sticks and wasn’t compatible with my motherboard. So i then returned then and ordered ram sticks i msde sure that weren’t compatible. Now my computer doesn’t connect to mh monitor. Just days no signal and then when i turn it pn it turns off 20-30 seconds later and 10 seconds after it turns of fun turns on. I don’t think it’s my psu as it worked perfectly fine for a week+ it’s a 750W psu made by Corsair. 

Specs:
Ryzen 1700x
62x kraken
x370 Taichi
G.Skill flare x 16gb ram sticks 
750WM Corsair

 

ive replugged in basically everything instead of wires in psu. I unplugged everything from the motherboard and plugged it in. I reinstalled my graphics card as well and changed the dimm slots of my ram and even tried 1 stick.