Setup:
Intel Core 2 Duo
2GB DDR RAM
Geforce 7800GT
Asus P5wD2-E Premium
480W Thermaltake Purepower (20pin, 4 Pin ATX)
Plugged the bear minimum in, mobolight comes on, everything powers on (CPU heatsink Fan, Graphics fan) no post boot, no beeps.
Tried different graphics card, same result. I have a feeling its the Power Supply, but don't have a 24pin/8pin to try out. The manual says that a 20pin/4pin should work so long as its 400W.
Any ideas before I run around screaming?