Like i said in my other threads my computer is turning off by itself. I have pics of temps on the other thread. Bt they are all fine apparently except forthe Cpu which shot up 20C... That was after i reinstalled it so i might of reinstalled it wrong.. Anyways What should i do? I have a multimeter? What should i test? I really need help, and my parents are freaking out because they just spent 1000$ on it and ive only had it for a week. Specs are:

Gigabyte P45, Hd 320gb, 4gb Ram Corsair XMS2, Intel Q9400, Xfx hd4890. Oh and on a side note once when i turned it on i saw neither the cpu fan nor the gpu fan turn on so i tighethend some wires and it turned on... Now it shuts off.

Couldn't find a guide or anything. CAN someone please tell em what i should check and how? it's been 2 days and my parents are freaking out.... I mean they just spent 1000$ and they don't know much about computers if anything, so they are freaking out...

I'd hope so i had trouble applying it, i had the same problem first time to. There was still paste on the Cpu. And there are 3 fans in my case >.< . ANyone know a way to check cuz pushpins are annoying as hell;. And how do i check if my psu is screwed i got a multimeter