Reset BIOS screen frozen, HELP

[GuyWhoAlwaysNeedsHelp]

So, I've just built another system for myself, and everything was running fine for the first two days. But then this afternoon, the computer froze on the motherboard splash screen, no big deal, I read about people with similar issues clearing things up by resetting BIOS, so I decided to do the same thing. I didn't have a jumper for my motherboard, so I used the screwdriver method. At first the screen was black, but I figured out all I had to do was remove the disc I had in the DVD rom. After that I got to the UEFI Dual BIOS screen, at this point neither my keyboard, nor my mouse, was plugged in. The screen showed the message saying 'BIOS has been reset, what would you like to do?'
1. Load optimized defaults then boot
2. Load optimized defaults then reboot
3. Enter BIOS

At this point I attempted to plug in my USB keyboard, in every USB slot I had available, and it didn't work in any of them. So I thought it was just due to the keyboard being USB, so I used my PS/2 keyboard, to no avail. So, I thought maybe if I just restarted with the keyboard already plugged in, it would work. What actually happened was the same BIOS screen showing up..sort of. You see, it was the same background, and UEFI Dual BIOS was at the top of the screen, but the three previous options that had been shown before were not there. I tried the same thing I'd just done before, sans the keyboard and mouse, and the options showed once more.

To cut to the chase, I'd like to know how to fix this, obviously xD

My system is:
AMD FX-8350
Gigabyte GA-990FXA-UD3
EVGA GTX-750ti 2GB Dual Fan
Corsair HX-750
G Skill 8GB 1600mhz (2x4GB)
Lite-on DVD drive
Seagate 1tb 7200rpm hdd

Could it be that I don't have enough power in the system? I don't think it's a motherboard issue, but I don't really know :/

Help is appreciated!

 

[Darkbreeze]

Try connecting the mouse and keyboard and THEN short the pins. And make sure the unit is off first. And probably either flip the on off switch on the PSU or unplug the cable too. Then short the pins. Then put it all back and boot to BIOS. Then set the BIOS optimal settings. Then restart. See if that works. Main thing being the mouse and keyboard already connected when you short the pins. It might work, it might not. Generally when you reset the BIOS it enables legacy USB by default so you have the mouse and keyboard available. Make sure to plug them into one of the black USB 2.0 ports. Some boards are not real great about supporting USB 3.0 in Legacy.