New PC build will not post

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1

A couple of days ago I built myself a pc for the first time and I thought I had done everything right. But when I got it all together and turned it on the computer flicked off then on and kept doing that. I later figured out that it was in dualbios mode so I switched it to single. The compute then stayed on but still would not post. Then I tried disconnecting everything except for the motherboard power and cpu power with one stick of ram. During all of that I reset the cmos many times.

Now I have no idea what to do. I have looked all over the internet for a solution but couldn't find one. If you have any idea what is wrong please tell me.

 

Here are the specs:

Motherboard: Gigabyte Z87X-UD5H socket 1150

CPU: Intel i7-4790k, 4 GHZ, 8MB Cache, LGA 1150

Power Supply: Corsair RM Series 650 Watt ATX/EPS 80PLUS Gold-Certified Power Supply - CP-9020054-NA RM650

Graphics card: EVGA GeForce GTX760 SuperClocked w/EVGA ACX Cooler 2GB GDDR5 256bit

RAM: Crucial Ballistix Tactical Tracer 16GB Kit (8GBx2) DDR3 1600 MT/s (PC3-12800) CL8 @1.5V UDIMM 240-Pin 

2

I later figured out that it was in dualbios mode so I switched it to single.

So you were able to see the uefi/bios configuration screen , or is that a physical switch ?

The compute then stayed on but still would not post

So the screen stays dark ? I assume that you tried pressing the source button on you screen.

3

no debug number??

4

There are switches on the motherboard. there is no beep and the screen stays dark and yes I check the source.

5

I don't think so...