HELP!

When I went to sleep last night, computer was running fine. Wake up today and the thing is off except for the power light on the front of the case is blinking and it refused to be waken back up. No fans on, nothing. The only way i could turn it off is to kill the main power and then turn that on again. I have it to never go to standby, so i am quite confused as to why it did and why i couldn't get out of it. I am running an ASUS A7V 1ghz atlon computer. Has anyone else had this problem? What does it mean?

Thanks,
Ackbar

Are you sure you did'nt get a brief power surge or outage.

yeah, no surge or outage... i have a battery backup, and no clocks in the house were reset.