Can anyone help me out, So i was replacing a psu with one that was given to me. I plugged in the cpu cable and the 24pin cable, to make sure that the psu work and everything in the computer came on such as cpu fan GPUs fan and light on the mobo. So i was like cool it works so i went through the process of getting everything put in and cable managed well when i was ready to fire it up i hit the power button and have nothing ? Anyone have any suggestions?