When I press the on button, the cpu starts up, I can hear the fans running, the keyboard flashes once and stops having power,I can't toggle between numlock and capslock and scroll lock, my mouse is working fine it had its lights on, my monitor can't start but its has already the lights on, it just says going to sleep if I turn it off and on again. No beeps, nothing after that... all I can do is press the on button and the reset button...

What should I do? I'm now using another computer to access the internet, I have to go to a public one, so if any of you know how to solve this problem please tell me.

Disconnect the power cord from the CPU.
Open the case.
Reseat ALL cards plugged into the motherboard, the memory, and all the power jacks plugged into the various components. Reseat them all.
Plug the cord back in and try again.

Any joy?