Repeatly Rebooting on BIOS

[Paladin5]

I built a new system for myself about two and a half months ago. This morning just after booting up and logging in, my network adapter wouldn't connect to my wireless network (something that has happened before) so I shut the computer down normally and started it back up. After starting it spent a long time (~10 seconds) on the BIOS screen before restarting. It then kept restarting (getting to the BIOS screen or reaching ~1 second in) until I manually cut the power. All further attempts to boot up have resulted in the same loop. I have removed all unnecessary devices (USB adapters, etc), removed my RAM sticks individually, removed my video card, and removed the power cables to my harddrives. Nothing effects the behavior. The computer also will not accept any input from my keyboard (so I can't do anything at the BIOS screen). I suspect/hope that it's my PSU (I had no problems with the system yesterday). Is there any way of testing it before using the warranty? It could also be my CPU or motherboard.

CPU: i5-2500k
Motherboard: Gigabyte GA-Z68XP-UD3 LGA 1155 Z68 ATX
PSU: Corsair Builder Series 600 Watt ATX 12V Power Supply
RAM: 2x G.SKILL Ripjaws X Series 8GB
Video Card: GIGABYTE Ultra Durable VGA Series GV-R685OC-1GD Radeon HD 6850
Case: HAF 912
SSD Crucial M4 64GB
SSD/HDD Seagate Momentus XT 500GB
Optical Drive: ASUS 24X DVD Burner
Operating System: Windows 7 Home Premium 64-bit
CPU Fan: COOLER MASTER Hyper 212 EVO

 

[Paladin5]

Update: I removed all of my data cables and reset the BIOS back to the factory default. No change unfortunately.

When the computer boots for more than 2 seconds, I get the system boots successfully beep from motherboard. On one boot, the system didn't actually shut back down on its own like usual and, instead, stayed on the BIOS screen for ~1 minute before I shut it off. This seems to imply that the motherboard may be responsible, correct?

 

[denis280]

Update: I removed all of my data cables and reset the BIOS back to the factory default. No change unfortunately.

When the computer boots for more than 2 seconds, I get the system boots successfully beep from motherboard. On one boot, the system didn't actually shut back down on its own like usual and, instead, stayed on the BIOS screen
this sounds like a hd fail.you get the bios but windows is not loading

 

[nsafreak]

Unfortunately this is a problem that hit some earlier revisions of that board along with some revisions of the GA-Z68X-UD3H board as well. I have the GA-Z68X-UD3H and I haven't had this issue occur so I'm thinking that it has something to do with the BIOS that comes loaded on the motherboard based on the revision. You may want to try upgrading your BIOS and see if that fixes the issue.