Stupid question, probably not the last...

[Mean MrMustard]

I am building a new machine. I installed an extra fan on the case. To see which way the fan blew the air, I plugged it into the power supply and plugged the it into the wall. Nothing happened, is this supposed to happen or is my power supply screwed? (I have not installed the motherboard yet, I hooked it up directly to the power supply.)

 

[Bglad]

Power supply is switched by the motherboard. It only supplies standby voltage until you hook it up.

 

[ledzepp98]

bglad is right, plugging it in will not do anything without actually turning it on (and you need the power switch connected through the motherboard for that)

 

[jscobie]

its right....need a mobo!
well to check the flow, there should be 2 arrows on the fan case...one telling the direction of rotation, the other tell which way the air will flow (push to)