|Did some research, I think i got it. but I am not PC literate enough to know "exactly" what this means:|
Newer form factors, starting with the ATX/NLX, and including the SFX and WTX, have changed the way the power supply is turned on and off. Instead of using a physical switch, these systems are turned on by a signal from the motherboard telling the power supply what to do. In turn, the motherboard can be told to change this signal under software control. This is what allows Windows to shut the power down to a PC, or what allows such features as turning a PC on from a button on the keyboard. This feature is called "Soft Power" and the signal that controls the power supply is called "Power On", or alternately, "PS On" or "PS_On".
I read this to mean that the main board tells the psu to actually "power on" with this "soft power" feature.
So... no main board no power output by psu.
Is this correct???