My PC just made a loud bang (can't tell for sure, but it did sound like a capacitor exploding) and turned off immediately after, but it managed to boot itself back up right away without me pressing the power button. I only used the pin to log in and check if all the hardware showed up normally and if it had anything in the events , the only one that was showing was the kernel 41 I think. Turned it all off as quick as possible and unplugged it from the wall. It's late and I can't check the mobo because I can't use lights right now, but will check first thing in the morning. My question is... Does the PSU have anything that would make that pop sound? It's a Corsair CX750, there was no smoke or smell. And it did boot itself back without any problems... If the mobo doesn't have any burnt marks or blown capacitors I'll probably try and see what I can do to replace the PSU. The whole system is brand new, a month since I've build the PC.