No display no usb

ahmet_bll_gz

Prominent
Nov 29, 2017
1
0
510
I just built a new pc. With:
Amd ryzen5 1600x
Msi rx580 8gb
Msi b350 pc mate

I am using 2 8gb 3000mhz c16 ddr4 rams
As a psu i have 700w

First of all i built my pc and tried to boot it. Pc worked fans leds everything is fine. Except there is no display on screen. Even more there is no light in my mouse or keyboard.

I've tried http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems these solutions and none worked.
Also when i tried to boot my system without gpu my motherboard gave me cpu and dram leds. After that i plugged in my gpu and everything is same as always.

My question is how can i fix it?
Or how can i find the problem?
Which one of my components are broken?
They all have warranty and if i can find it in 6 or 8 days i can easly refund them. Thank you for your answers