Every time I connect the 4 pin CPU my whole computer won't start up and then when I take it out it starts up but with a red LED near the CPU thingy. Just yesterday everything was working fine and I did the system BIOs settings and then I had to re-plug in my hard-drive because it didn't recognize it. So when I took out the power cable and put it back in into the hard-drive the computer wouldn't start up anymore. I Checked every-single part with another computer and they all work perfectly fine.