Help with my Motherboard!!

[ejmcdaniel1]

I just installed my P4SD-la into a new case. I have everything connected, but as soon as I try to start the computer, it wont turn on. When i Push the power button I see the power supply light turn on for one second and the CPU fan start to spin, then it stops and powers off. I really need help on this as soon as possible
COMPUTER
Pentium 4 2.6 GHz
1 GB ram
Two Disc Drives (DVD,CDRW)
120 GB HDD

Edit: I have used both a 250 watt and a 450 watt powersource and the same thing happens for each

 

[wozelbeak]

i had the same problem, it turned out to be the wires from the front panel to the mother board being wired wrong.
i had got a couple mixed up, there were a row of about 10 pins which i screwed up on.
woz

 

[mayorredbeard]

does it just turn off or do you get like an error message or something?

If it just turns off it could be somethign wrong with your motherboard, more specifically your bios chip.