Ok, well I have now taken all the parts out and installed it all over again, though only connecting the PSU, CPU, RAM, Fans and Mobo. And the problem still happens.
I have tried many different Ram, and PSU...I know the Mobo is working as the green light goes on.
It just leaves me to the CPU.
Does anybody have any other ideas?
Spec is:
PSU 500ws
Asus Socket939 bundle with A8N SLI Deluxe motherboard and retail boxed AMD Athlon 64 3200 ADA3200BPBOX CPU
512mb DDR 3200
Hope you can help?