The problem is about a week after the build the computer wouldn't start, i checked all the cables and there doesn't seem to be any problems that i can see. Once in a while the mobo lights lite up and i can turn on the computer but the power would turn off out of nowhere. It would be great if i could fix the problem without having to replace the parts because i don't know if the warranties are still on the parts because most of them where bought about 2 to 3 months ago.

My computers specs are: Asus P6t Deluxe Mobo, I7 920 cpu, 12gb ddr3 -1600 ram, Coolmax 1200 watt power supply, GeForce GTX+ 9800 vid card, 2- 22x DVD±RW drives, a vantec multi memory card reader, Seagate BARRACUDA 1.5TB hdd, Cooler Master V8 CPU Cooler in a Antec 1200 case. Any help i can get would be GREATLY appreciated.

I could possibly take some pics of the PC if that would help.Did you APPLY thermal paste when building ?
Were all MBoard standoffs in place ?
Have you tried swapping in another PSU ?Thermal paste was applied with good coverage but not too much, all the standoffs where in place, but i haven't tried swapping in another PSU. I was hoping it was a easy fix and something i just overlooked somehow, as of right now the lights on the mobo are on and i know i PROBABLY can turn it on but it prob will go right back off after a while or after i put the side panel of the computer back on it will stop working again. The PSU was bought about 2 1/2 months ago so i don't know if the store will let me exchange it. Doesn't matter if they will exchange it or not until we know it's the culprit....
Borrow one,