Gaming Rig shut off mid-game

Biblicalwizardx

Prominent
Jul 12, 2017
6
0
510
Gaming Rig randomly shut off mid game. Help? I was playing Sir, You're Being Hunted and mid game the rig just shut off as if the power had gone out. The power hadn't gone out. The rig was plugged into the wall outlet. There is a green LED on the motherboard that is still lit. The power button on the front of the rig doesn't work to turn anything on. I'm pretty new to Gaming and the setup isn't that special. Any help is great. These are my specs by the way:
CPU: i5 3470
RAM: 8GB of Patriot Gamer 2 series ddr(2x 4gb)
MOBO: Intel Dh77df mini itx
PSU: 500 WATT sff
HARD DRIVE: 500 GB Western Digitial Blue
 

Biblicalwizardx

Prominent
Jul 12, 2017
6
0
510
I unplugged it from the outlet and I am no trying to find the motherboard battery. The PC is a little bigger than an XBOX One. Very compact internals and I can't locate the battery. Any other troubleshooting options. Thank You so much for your help.
 

Biblicalwizardx

Prominent
Jul 12, 2017
6
0
510