When putting my computer back together after tidying up, I didn't check which of the two 4 pin connectors coming from my psu I put into my motherboard, and accidently put the one with 4 rounded squares in instead of the one with 2 squares and 2 rounded squares. My computer didn't boot up and the CPU fan doesn't start. I tested the fan with some wires and a battery and it works fine, and I made sure all the other parts worked except for the motherboard and cpu. Is there any way I can fix my motherboard, and is my CPU dead too?