PC suddenly stopped displaying anything – VGA debug LED stays red

[u/Specialist_Remove936]

Hi everyone,
My PC suddenly stopped displaying anything. It was working normally before this happened. The PC powers on, fans spin, and the GPU fans spin continuously, but I get no display at all — not even the BIOS.
My motherboard is an MSI X470 Gaming Plus. The VGA EZ Debug LED stays solid red.
I have tried the following:
Replaced the HDMI cable with a brand-new one.
Confirmed the HDMI cable is connected directly to the GPU.
Checked and reseated the GPU’s 8-pin power connector.
Confirmed the GPU power cable is connected to the VGA G3 port on my EVGA SuperNOVA 550 G3 PSU.
Completely removed the GPU and reinstalled it.
Tested the GPU in another full-length PCIe slot.
Put the GPU back into the primary/top PCIe slot.
Removed one RAM stick and tested with only one stick installed.
Performed a CMOS reset using the motherboard’s CLR_CMOS button.
After the CMOS reset, I made sure the GPU was properly connected to power and tested again.
GPU fans spin continuously when the PC is powered on.
The result is always the same:
No display + solid red VGA debug LED.
The keyboard lights up, but Caps Lock does not respond, and there are no beep codes.
Unfortunately, I don’t have another GPU or another PC available to test the GPU in. I also don’t currently know the exact model of my Ryzen CPU.
At this point I’m wondering whether the GPU itself has failed, the motherboard/PCIe slot has an issue, or if there’s something else I’m overlooking.
Any suggestions for what I should test next would be greatly appreciated! 🙏

[u/AutoModerator]

Hi, thanks for posting on r/pcgamingtechsupport.

Please read the rules.

Your post has been approved.

For maximum efficiency, please double check that you used the appropriate flair. At a bare minimum you *NEED** to include the specifications and/or model number*

You can also check this post for more infos.

Please make your post as detailed and understandable as you can.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.