One other thing to check are the screws and standoffs that you used to attach the MoBo to the chassis. While fighting my no-power-up-battle with an Asus Maximus, I found information about making sure the screws and posts were not allowing a short, and also warnings about taking care not to accidentally press the back of the exposed processor socket into the chassis.
The Z97 versions has small LED indicators, on the MoBo, indicating status of the components (ie. DRAM/ PWR/ Boot_Device/ CPU/- POST status etc.). They will stay lit up until the problem is solved. [see Page 1-36 to 1-38 of the Z-97 manual] I want to think the Maximus showed Orange error, and Green functional, on these small LEDs.
You may have checked all of this already. I am just thinking out loud regarding the battles that I fought, to maybe trigger something for your troubleshooting. That was my first Asus board to work with and I found it pretty finicky. The bent pin was the result of a very low-altitude, innocent (I thought) drop of the processor, onto the pins, during installation. But once I had all the kinks worked out (Pin straightened, BIOS updates for the i7, etc.), it is an unbelievable, beast of a machine.
Dale