Hello, I was building a backup pc from some old parts I had and I made this mistake! I tested everything worked fine without a cpu cooler.. then I decided to put the cooler on but the 4 pin power cable was in my way so I unplugged it. I put the cooler on but forgot to re-plug it in and the pc turned on, fans started spinning but there was nothing on the screen. Then I realized what I had done! I cut the power and plugged it in again but there was no result.. the pc doesn't power on now.. Fans start spinning and immediately turn off.. Did I mess up my mobo? Is there any way to get over this or is it final?