So I've put everything in, and when I finally took the "plunge" to turn the beast on... it turned on fine, all the fans spinning and it sounds really smooth ♥one problem though. Nothing on the screen!
So I took out the mobo and did the bare minimum to start it up. The mobo shows it has power and fans will spin... I don't see the bios come up and I also don't hear a "beep".
If the mobo shoots power everywhere and has power indicators... is it the CPU that is bad or something?
There could be a multitude of reasons why but two I personally ran into are that either the PCI-E power connector isn't plugged into the video card (if applicable), or the RAM is dead. Check one stick at a time in each slot and see what happens.
Many motherboards come with trouble-shooting LEDs. They are a set of lights on the board that will tell you what is wrong, generally. I would recommend reading your MB manual thoroughly and seeing if it has such a feature, because that can usually tell you exactly which system is hurting.