NEW and OLD Motherboard now doesn't work (NO DISPLAY BUT STARTS UP)

Charlie_15

Reputable
Jan 6, 2016
3
0
4,510
I brought a new motherboard and PSU,
-Motherboard (a88xm-Gamer)
-Corsair 750w CX750m
CPU- A8 6600k
RAM- HyperX Fury 16GB (1800Mhz)
GPU- GT730 2GB

So I've installed my new MOBO into my case, had to use riser fittings, (MOBO isn't touching case) So I've turned it on and loading up my Desktop and went to run GTA it loaded and I then pressed SHIFT+TAB to bring up my Steam menu then my DISPLAY just went black but everything was still running, like fans and HDD, CD Drive, but now I try powering up and all it does is just start up but no display, I then decided to plug in my old motherboard and my old PSU (which is 500w) and then I put the CPU from the new one into the old MOBO and powered up, and for some weird reason this MOBO also has no display, I've reset CMOS and still nothing, tried the jumpers on the new one and still nothing.
So now both of my MOBO's aren't working
All my PC does is just start and fans running HDD running and CD-Drive is running,
I tried the RAM solution trying one by one and stil nothing

Old Motherboard is a GA- f2a55m-HD2

Forgot to say the Compatiable OS that is required for the new Motherboard is Windows 7/8/8.1 I had Windows 10, would this cause any disruption to the display? I can't even get BIOS up so I'm hoping you guys have an answer