New pc with black screen

Sep 22, 2018
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Hello,
few days ago i ordered new components and they all came and i put them together,when i did all of the stuff i tried turning on my pc and my screen is comeletly black,also my mouse and keyboard are not turning at all,my keyboard turns on only on a moment i press the button to turn pc on but shuts down after that.
I opened my pc to check the components,cpu fan is spinning,pc case's fan's are spinning,power supply aswell,mobo's fan aswell,but gpu's fan starts spinning for like 10 seconds and then it stops.I tried unplugging my ram and gpu and plugging them back but the result is the same
Specs are:
Cpu:Amd ryzen 5 2600
Gpu:Nvidia gtx 1060 aero itx 3gb
Power supply:Smart RGB 500W
Mobo:Asus EX-A320M-GAMEING