Computer stoped working. Need help.

[Hdidjhxhxhxj]

P6td motherboard power and reset lights light up when power supply is turned on. All fans start running when I power system. Monitor receives no signal.

I have tried 2 different graphics cards with 2 different monitors and also tried putting graphics card into another slot. I unplugged and reattached every power cable.

The computer was working about a hour earlier before I powered it down. The lights in the computer flashed on and off when I turned it back on after that as if power was going on and off. They stay on now but computer doesn't work.

Any idea what might be broke and how to test it?

 

[CRAZYB0N3S]

Try your onboard graphics and if that doesn't work send the motherboard back for a new one if your warranty still covers it.

 

[Hdidjhxhxhxj]

I found a post here about breadboarding. Computer seems to operate the same with no memory or graphics. There are no beeping sounds. CPU makes a little noise like it's doing something. Noise goes away when 4pin power near it is disconnected.
I'll try to find a power supply to test it with. If it's not that then how do I figure out if it's CPU or motherboard? I don't have another cpu