help!

i got to school and i plugged in my computer and guess what-- it doesnt work.

the computer turns on but it wont boot up.

i have:
p4 3.0ghz with HT
2gigs of DDR 533
128 meg X800 ATi video card running on PCI-E
WinTV tuner
audigy 2 sound card.
phillips DVD+-RW
dvd rom
floppy drive.

it seems that once the computer turns on it does nothing else-- no bios no anything.. the keyboard is unresponsive and it won't numlock or scroll lock (which it whould do at about any time)

help me out guys i am freaking out without a computer. could my memory bad? i was thinking maybe it's the cmos but i reset it and nothing. at frst i thought it was the video card.. but then i got to thinking if that were the case it would beep. IT DOES NOTHING