Question Why doesnt anything display?

[AnonymousPCBuilder]

I built a PC with a Asus Rog Strix 2070 Super. and when I plug in the HDMI the monitor displays no HDMI signal, and I know that the problem is not the monitor or cable as I used both to run my PS4 as a test please I really need help. thanks!

 

[rgd1101]

full system spec? include make and model of the psu