Solution

It was probably my motherboard. I got a new CPU and motherboard and it worked. I also upgraded from DDR3 to DDR4 ram in the upgrade process

Background

So my computer is not posting, and I am unsure the cause. I am not getting an error code, so that complicates things. I do not know if this motherboard will provide post codes, it does not have a seven segment display for providing post codes.

How it started

It just randomly stopped displaying any pictures, unsure if it happened while in use or when the computer was asleep. I was doing stuff at my desk and had music playing on my computer. The music ended and I did not put on more music and the monitors went to sleep. Later when I went to use my computer It did not appear to wake up, I tried fully shutting down and turning on my computer, and that is when this problem occurred.

Symptoms:

• When I power on, computer appears to start normally, with all fans spinning so power delivery appears to be working. Even GPU fans are spinning.
• Holding down the power button turns the computer off as normal.
• Nothing is displayed on the screen, my monitors do not even detect an input.
• USB devices do not appear to be powering on.
• Every minute or two, the GPU fans ramp up briefly, and then ramp down. It may be all fans are ramping up, kind of hard to tell exactly which fans are ramping up.
• With the AMD GPU, the LEDs for power turn on. However, I vaguely recall the GPU itself having some RGB when the system was running that was not on. How my computer was setup I did not see inside my case that often, so the RGB on the GPU is a vague memory from a few years ago and I would not put much weight in there being some RGB.

Hardware:

• MOBO: Gigabyte 9900FXA-UD3
• CPU: AMD FX-8350
• GPU: ASUS Radeon HD7870 or EVGA GTX 970
• PSU: Cooler Master Elite V2 550W

Troubleshooting Attempted:

I initially assumed it was GPU related as the computer appears to turn on normally, but then nothing is displayed. So another user shipped me his old GPU (the GTX 970), and I swapped it out with my old one, and the problem persists.

I tried swapping out the RAM

I tried a brand new PSU and that also did not solve the issue

Leading hypothesis

Since I have changed everything out except CPU and MOBO, I am thinking it is probably my MOBO. I am currently researching my options for replacing my MOBO, or a friend offered me his CPU and RAM from his old rig with a broken MOBO that may be a better option than replacing mine.