After 4 years, my stock intel fan wasn't cutting it, so I bought a 212 EVO and installed it. Upon plugging in the power cable and flipping the switch to the PSU, the fans all started spinning slowly and all LEDs started flashing. Keep in mind, this was without me even pressing the actual power button. So at this point, I'm pretty sure the motherboard is being shorted out. To test, I take all the components out of the case and try booting up. That worked fine, so I know all the components work, it just has something to do with how the motherboard sits in the case. I tried putting the motherboard in and checking the screws one by one to see which one could do it. I screwed them all in and it seemed to work fine, but then when I placed my GPU in the motherboard, the problem started happening again. I think the force of me pushing down on the motherboard caused the motherboard to touch something it shouldn't. I think it's possible that it's the nut that goes over the backplate of the cooler, because that is dangerously close to touching the back of the case. Would electrical tape over the hex nuts on the backplate be enough to fix it if this was the problem? Or is it more likely to be something else, like potentially a standoff? I don't think it's the standoffs because the computer has worked just fine without a problem for 4 years, but maybe I'm wrong.
Parts:
i7-4770k
Asrock Z87 Extreme
16 GB Patriot 1600Mhz RAM
GTX 960
Corsair CX750M
Parts:
i7-4770k
Asrock Z87 Extreme
16 GB Patriot 1600Mhz RAM
GTX 960
Corsair CX750M