GA-Z68A-B3H-B3 Rev 3 can't get past splash and reboot loop

[iclark130]

Hi -- I'm building a new system for the first time here.  I believe I've done everything correctly so far:

GA-Z68A-B3H-B3 Rev 3. motherboard
500w PSU
2x 8gb 12800 GSkill DDR3
Core i5 3550

When I boot the system the fans turn on, I get the splash screen on the monitor and the cpu fan turns on.  I've simplified things by disconnecting the optical and SSD as well as additional ram (only 1 stick in right now).  I get a single beep for a successful boot, but I don't get any lights on my keyboard (connected by PS/2).  I can't hit access the BIOS setup and after about 10 seconds the system shuts down and automatically restarts. 

- I don't have any extra mounting screws underneath the board that might be shorting it
- I do have the 4pin and 24pin ATX cables secured firmly
- I've tried two sticks of RAM in different channels
- The lights on the keyboard do light up when I first power on the PSU and if I hit the power button on the case
- Have tried resetting CMOS both by taking the battery out and by shorting the reset CMOS pins


Any thoughts would be greatly appreciated1

[dikal]

Hi iclark130

My suggestion is ...
-Read POST messages, pressing the TAB key in the splash screen.
-Try to get into QFlash (END key in the splash screen), then flash F13 BIOS.
-Try another PSU, if you can (what is the exact type of your PSU?).