Question no display output

Dec 9, 2020
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I bought new parts for my new pc, which I finished building a few hours ago. I used HDMI to connect pc to monitor but there is no output on the screen. and i don't know if the pc has updated the bios from a flash drive (which I plugged it in to update the bios.)



the parts I'm using are:



MSi B450 gaming plus max

Ryzen 5 2600

no GPU

Trident z 16gb

WD ssd 512gb



and there are no led which are showing any error on the motherboard.