Hi, I have my first build here. I just got my CPU (Ryzen 5 2600) and put that in. My PC booted up and after about 20 to 30 minutes it randomly turned off without a sound. I actually turned my back for a couple of minutes so I could get the driver for my wireless adaptor and when I turned back, the PC was off. I pressed the power button, and a I had lights for the case turn on for a brief second and the CPU fsn spins briefly. If I press again, nothing. If I disconnect the power cable and after a period connect again, then I get the same thing:very brief activityas stated above. The fan lights do not turn on though. What can this be?