Hey no need to feel sorry, we were all once new to this.
Anyways these are the front panel connectors:http://1.bp.blogspot.com/-Zsj3wrJMsgQ/T1zBwCE0TNI/AAAAAAAAAUw/ISDPg13d56w/s640/front_panel.jpg
If this was a newly constructed build then you may not have installed these connectors (as seen in the image) to your motherboard. In addition, they need to be installed in a specific way which is outlined in your motherboard manual.
Also did you mean the computer wont turn on at all or just wont post?
I believe post means "power on self test." I believe the motherboard performs some tests to make sure everything is working fine at the bios splashscreen, if stuck at it you may have an older bios revision. If the computer wont turn on at all then forget about the bios.
Also did you make sure you connected the 8 pin power connector to the slot on the motherboard?
Edit: here is something about POSThttp://en.wikipedia.org/wiki/Power-on_self-test