New build no video

Apr 1, 2018
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I finished assembling my new pc which I built myself for the first time. After turning it on, all components light and all fans turn on even the one on my graphics card. But no display. I am sure of the connections and also the psu is brand new and everything lights up so it is not the psu. Also I tried unplugging the gpu and still no signal. I also tried with one and two sticks of ram also just like the mobo stated to mount them. Am starting to panick so please help.

These are my specs:
Cpu : AMD ryzen 5 1600
Mobo: asus prime b350-plus
GPU: gigabyte gtx 1060 6 gb g1 gaming
HDD: Seagate barracuda 1TB
PSU: corsair cx550m

Note : I didnt plug in the mouse and keyboard and also I am using a tv as I dont have a monitor right now and also when the pc lights after pressing the power button it dosent turn off no matter how long I press the power or reset switch untill I turn it of from the back of the psu