I have a new PC for about 3 months and it went to a state when I couldn't turn it on for a couple of times now.
That means no matter how much i pushed the power button or tried to switch the power source on and of, the computer would appear completely dead. After some time, if would turn on (fans start spinning) but shut down after a few seconds. In the end, it would turn on, but I have no idea why. Last time it happened, there was a problem with BIOS being corrupt, then after it refereshed from the backup, I still had to reinstall Windows, since the computer wouldn't turn on. I first suspected, it happened after sleep mode, but today, the computer powered off while i was working with Word, for no apparent reason.
There was also no BSOD, just the PC going dead all of a sudden, and I can't really find any logs of what happened (no minidump or anything). This time, the computer powered on after I unplugged and pluged what i believe is the power cables of the motherboard (there were 2x4 thin cables) also with some BIOS problem, but this time I didn't have to reinstall.
I was thinking there might be a problem with the power source, since the PC seems all dead, but I really don't know how to make sure. Now the PC runs fine.
I'm using win 8.1, seasonic 500w energy knight source, GIGABYTE GA-B75-D3V motherboard.