Ok. I took everything out and I think I discovered the problem. My 24 pin connector wasn't fully secured. So only some LEDs light up. When I hold it in a specific way I manage to make all the LEDs light and fans spin. Still no post beep tough.
The 24 pin connector is insanely hard to connect. I have a seasonic 1000W platinum. I managed to push it 2/3 of the way but the secure on the right side of the socket still doesn't clip in.
And yes I'm connecting it the right way.
I am afraid of damaging the motherboard with using any more force.