I recently built my PC and it was running perfectly until today. I was gaming without any issues, but after shutting it down, I can't get any display when I try to turn it back on. I've done a few troubleshooting steps:
- Reseated and swapped the RAM
- Reset the CMOS by removing the battery
- Removed and reinstalled the GPU
- Uninstalled the graphics drivers
- Checked all cables and power connections
The fans on my GPU are spinning, and the LED is lit up, but the display only works when I plug the HDMI into the motherboard. In Device Manager, I can only see the CPU graphics and no sign of my GPU, which is a 7800xt.
2 Answers
It sounds like your GPU might not be getting power or it could have failed. Have you tried putting the GPU in a different PCIe slot? Sometimes that can help
This might sound a bit silly, but sometimes monitors don’t automatically detect the signal. You might need to switch it manually. Also, a BIOS reset could help, so consider looking into that!
How do I perform a BIOS reset? Should I think about getting a new monitor?

I gave that a shot and moved the GPU to another slot, but it still didn't work.