HELP! Comp Won't Boot!

HI. I have a computer that i just finished putting together a couple oif days ago and for some strange reason it wont boot. The D Bracket shows led 1,2, and 4 red, while 3 is green. This is "Initializing Keyboard Controller." I have tried removing the battery and setting the jumper to clear to clear CMOS but still it won't boot. My screen dosen't come on and the only thing that really happens is the fans spin. I haven't reset any settings on my Mobo. I have my Win XP disk in the CD drive because I don't have an OS installed yet but it won't start. Can anyone Help Me PLEASE!!!

First of all - have you tried another keyboard ( ordinarie ps/2 ).
Other things that could give strange problems;
- check for if Motherboard shorten / chassi contact ( check standoff´s between the MB and chassi - correct mounting and right number at the right place )
- reseat your cpu
- reseat memory ( other memory ) and test other slots

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