Vga light

Just built my first pc and I’m not getting a post, pc will turn on fine apart from one rgb Corsair fan and the VGA white light is on on my rog motjerboard how do i fix this

I just put together my new build, however when I boot it up the cpu and dram debug lights flash for a second, and then I get a solid white vga light and a green boot light. I get no display signal at all and can't get into the bios. I've removed my gpu for the time being and plugged directly...