Hi ancliberties First try resetting the bios per Gigabytes instructions.
http://china.giga-byte.com/FileList/...790x-ds4_e.pdf
You could be getting a short from the case. We recommend removing that motherboard from the case/chassis and test the board for POST. Please follow the following simple steps.
1. Place the motherboard on top of the cardboard box (you can use the motherboard box)
2. reseat and or install a good CPU, good CPU fan, good Memory, good power supply (plug the 1 X 20 pin and 1 X 4 or 2 X 8 pin from the power supply unit) and a good video card.
3. Hook the monitor to the video card and be sure the monitor is switched on.
4. Turn on the system board by using the good case "Power on" switch.
If the system fails to POST, check the components' insertion again to ensure they are all connected properly.
These are instructions from Gigabyte. Try this and let us know how it goes.