Question Turn on computer, everything starts as normal, but screen is black.

[Skald1984]

When I turn on the computer everything starts up almost as normal (I've noticed that it whirs up for a second, pauses, and then carries on, which it didn't used to do). However, the screen is black, nothing happens. I've changed the PSU for a new one, and replaced the Motherboard, but the exact same problem is still happening. I've swapped out the Graphics card, and tested my HDMI cable on a laptop, all to no avail.

I'm absolutely stumped now and have no idea what to do next, the only thing i haven't changed is my processor, could that be fried?

 

[rgd1101]

full system spec? include make and model of the psu

 

[Skald1984]

mobo: Gigabyte GA-970a-ds3p
CPU: AMD-fx-4100 4 core
Ram: 4gb DDR3
Windows 10 64bit
PSU: evga 500w

 

[Keller Kain]

I have a similar problem with an older laptop, I just changed the cpu and have that problem, did you ever figure out what caused it?