Originally Posted by vaio-fx
I'm in the process of building a new computer, it is the 3rd one that I have built. All the parts are in but it just doesn't work. The problem is that when I push the power chord into the back of the power supply, the fans (case and on the psu) turn on for a brief second and turn straight back off again. This is before I have even pressed the power switch on the front of the case. Thanks for any help.
What you're explaining here is normal; some computers I have worked with do the same thing when you connect the power cord.
Don't take this the wrong way, but you surely have turned the power switch on from the power supply, right? from O to I?
Also, try re-checking the power connectors to the motherboard.