So last night I was playing world of tanks and all of a sudden my computer shut off. When I tried to turn it back on the fans fired up but the screens didnt, no beeps from the motherboard and the power button wouldn't shut it off. I tried a few things like checking the memory and resetting the CMOS which did nothing. I was told sometimes the fan plug for the CPU can stop making connection for the sensor so it will run the fan but think it isn't running. I unplugged the CPU fan and plugged it back in and it started back up. So if your computer dies like that check your fan plug. Might save you from ordering parts it doesn't need.