Computer won't boot

[derricklee]

I built a computer quite recently (1 month ago) and it was working perfectly fine until a few weeks ago. I had the blue screen and then my screen wouldn't turn on. The mother board would still turn on and the fans and everything seem to be working.
I tested my psu and graphics on another computer and they both work pefectly fine. I sent my motherboard back to overclockers and they tested it saying "its loads to os perfectly". So now I'm stuck on what is the problem.

My rigs are:
-Asus Maximus VIII Hero Intel Z170 (Socket 1151) DDR4 ATX Motherboard
-Corsair Dominator Platinum 16GB (4x4GB) DDR4 PC4-24000C15 3000MHz Quad Channel Kit (CMD16GX4M4B3000C
-Samsung 850 EVO 1 TB 2.5 inch Solid State Drive - Black
-Corsair CC-9011063-WW 780T Graphite Series Windowed Full Tower ATX Gaming Case with LED Fan - Black/Red
-Cooler Master RL-N24M-24PK-R1 Nepton 240M "Ultra High Performance, Closed Loop Liquid Cooler, 2 Silencio Fan, 240mm Radiator" Black
-Samsung 950 PRO NVMe M.2 256 GB Solid State Drive - Black
-Intel Core i7 6700K Processor (4 GHz, 4 Core, 8 Threads, 8 MB cache, LGA1151 Socket
-Corsair CP-9020099-UK Builder Series CX850M ATX/EPS Semi Modular 80 PLUS Bronze 850W Power Supply Unit
-Gigabyte GTX 970 Graphics Card

Sorry if this is the wrong part of the forum to post this.

 

[AdamScott85]

Tried clearing the CMOS?

 

[Temujin]

Have you checked each individual stick of RAM? I would hazard a guess that one of those may be preventing a full boot, if you haven't tested that already that is.