New build pc - no display

[bigburnzfl]

Hi looking for a bit of help and advice with my new build gaming pc i have just screwed together. Im hoping its just an obvious/ silly mistake. Finished building this evening and went to do first power on, and getting nothing from the monitor. Have tried the displayport on the graphics card and motheboard, both hdmi ports on the car and the mb, have tried on a gigabyte monitor and my lg tv. Absolutely nothing. Im not getting any beeps indicating faults when turned on, and there are “q-led” on the mb to indicate faults with boot, cpu, vga, ram - none of these are illuminating to indicate fault either. So im at a loss where the problem is, not helped by the fact i havent really built a pc for over 10 years so im a little out of date.

Here’s the spec;

Rog strix b550-f gaming wifi
Ryzen 7 5800x
Corsair vengeance 2x8gb 3600mhz
Samsung 980 pro 1tb
Corsair h100i elite cappelix aio
Corsair rm750x psu
Asus dual geforce rtx 2060 6gb oc evo

Some pics incase anything jumps out as wrong, and a vid of switching on

https://youtu.be/GGtcTVeYGkE