Hello, ehm i just bought a new computer recently, it's bought used, but been used for 2 years. so this is my problem. when i press the power button, it gives the power to power supply then to the rest of the components. but when i the power button, it takes 1-2seconds and then it turns off, and tries to turn on but it shuts down immediately. I'm concerned it is my power supply, but not sure. when i bought it it worked, it was on before i brought it home, but when i got home, and rigged it up, it started to struggle turning on. here's a list over the components that my computer have: Motherboard: Asus P5K-E/WIFI-AP, P35, Socket-775 CPU: Intel Core 2 Duo E6850 3 GHz Graph.card : Asus GeForce 8800 GTX 768MB RAM: OCZ Nvidia SLI ready XTC 2 Gb Power supply: Fortron/Source Epsilon 700W HDD: Samsung Spinpoint T166 SATA 500 Gb CD/DVD burner: Samsung Super Writemaster Cabine: APLUS Case Twin Engine When i hit the power button, it gives power for just a second or two, all lights blinks, and makes a piip. then turns off, and restarts several times without hope.