I bought a new pc , or at least the components recently. I have had nothing but problems. in short what happens when i flip the switch on my power supply is the computer turns on for about 3-5 seconds then off, the power switch will not work. i have replaced everything but the cpu , i had an ultra power supply , but replaced it , finding out that it might be the problem , so i replaced it with a thermaltake psu, 550watts, i replaced the motherboard which is a Asus a8n sli deluxe today and had to pay an $89 restocking fee. I replaced the case thinking it could be the power switch, I made sure the cpu fan is plugged into the cpu fan plug. checked that the cpu is secured properly. it turns on for a couple seconds , when i flip the psu switch , then off. power button will not work. I am going insane, please help!!!