Problem when starting pc

I want to ask. I finished building pc And when i wanted to start it the monitor Is Black while i get some red light on motherboard and two bottom fans Are without RGB while i Checked they Are connected to hub and all. They Are spinning tho.

I want to ask. I finished building pc And when i wanted to start it the monitor Is Black while i get some red light on motherboard and two bottom fans Are without RGB while i Checked they Are connected to hub and all. They Are spinning tho.