P67A-UD4 will not boot

[bitmonx]

After an hour or so of playing a game I shut down the pc. After a while (about 1 hour)I noticed the OS was hung up on the screen "shutting down". So I hit the power switch to force the pc to shut down. That happend about once every 25 shutdown on my rig. I tried to start the pc again without success.
I do get one short beep but then nothing happens. All the 6 phase led lights on the mobo are continuesly on. When the pc used to work, these phase lights were randomly going from green to amber to red indicating the CPU is loading the OS.
All the fans do work. The keyboard seems to work since the caps lock and num lock light will come on when I hit that key.
I did remove the cmos battery for about 2 minutes, no change.
When i depress the reboot switch on my case, the pc will continuesly try to boot and then shut down and then try to boot again in an endless loop with no post beep at all. I have to remove the CMOS battery to clear the CMOS to get a post beep, if CMOS is not cleared, the mobo just starts and shuts down forever.
Here is what I have installed in my rig:
PSU= CORSAIR HX 1000
CPU= i5 2500k (not oc'ed) aircooled by noctua
RAM= 2x 4gb gskill DDR 3-1600 PC3 -12800
GPU= 2x GTX 275 in SLI
Case= Coolermaster HAF932
MOBO= GA-P67A-UD4 no idea which bios

Is my CPU fried or is it a mobo issue?

Thanks for help.......

[wazza300]

Re: P67A-UD4 will not boot

take out the motherboard battery for 30minutes and then put back in and try

when you installed windows was the sata port set to ahci or ide? try both ways and see if it boots into windows

[bitmonx]

Re: P67A-UD4 will not boot

Thank you very much for helping me out!!
After removing the battery over night (fell asleep in front of the tv...) the next day IwS able to get into the bios. But windows was jot loading since it did not find my OCZ Vertex 2 SSD. I had it connected in the SATA 3 port.The other HDD which is a 1TB WD Black was also connected to the SATA 3 port. The third HDD (an older 500 gb seagate barracuda was connected to the SATA 2 port and when I disconnected it, I was able to boot into windows. Windows had downloaded some updates, installed them and rebooted. Again, I was unable to boot into windows. I disconnected the 1TB HDD from the SATA 3 port and plugged it into the SATA 2 port. Now I have not had any troubles yet.
What could have caused the problem in the first place? I was nof having Ny issues for over a year with the previous setup of my HDD and SDD.
Again, thanks for helping out......

[wazza300]

Re: P67A-UD4 will not boot

no idea,could need the bios updating to the latest one on gigabytes website