Pc wont turn on

Make sure your 8pin CPU power connector is connected.

Just built pc and the red light indicates two problems with it. Vga and boot. All the fans turn on, when i turn on the power. i checked the psu and gpu connectors. They're both, fine, I dont know what else could be the problem other than my motherboard. And if the problem is a defective motherboard, then im wandering why there are problems with the vga too. When i turn the rig on, the two red lights start at cpu and dram, and then shift down to vga and boot. Already tested the ram, cpu, psu, and storage. The graphics is used and has dust on the inside of it. I dont see any damage on it though. Should i just take everything off of the motherboard other than the psu conncectors and try to boot it up? That sounds like a pain though. Also the vga and boot lights weren't shining earlier. Instead it was the cpu and dram. But i carfully tested those already, so i think that problems fixed. And i installed them as perfectly as i could. Also one of the black boxes is bent:
https://ibb.co/5h86Ktw