No HDMI Output

[jgulley101]

Installed a new motherboard and cpu powered it on and nothing is showing up on my screen.

 

[Sandor20]

I have the same problem, but you may succeed with one of the steps I took. Please take a look:
http://www.tomshardware.co.uk/answers/id-3279443/completely-build-signal-boot.html

(& it would be great if you'd list your specs)

 

[jgulley101]

Now when I press the power button in turns on for about half a second then turns off

 

[jgulley101]

Motherboard: ASRock 970m Pro 3
Gpu: GeForce gtx 730
Cpu: Amd fx 8300

 

[Sandor20]

Go through these steps, maybe it'll help you:
http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[jgulley101]

Tried switching gpu and now it won't even turn on