Hello, so. I took my GPU out earlier in the evening, then this happened. I scratched the motherboard as shown in the picture by accident, now the machine wouldn't POST. It does turn on though, just no sign of life other than that.
All I can say is, "There I go but for the grace of God."
A few years ago, I was upgrading the M.2 SSD on my motherboard, which is located underneath the GPU. The PCIe x16 slot had a retention clip that had to be undone, but it was completely obscured underneath the graphics card, where my fingers couldn't fit.
So I took some tweezers and tried to use them to undo the retention clip. But even though I was pushing as gingerly and delicately as I could, I still slipped and scraped the motherboard ever so gently.
I was terrified that I might have just killed my motherboard.
So I went back to my toolbox and retrieved some tweezers with a curved head and rubber (plastic? PVC?) cap, like this. With those, I was able to undo the retention clip, remove the GPU, install the SSD, and reinstall the GPU.
I booted my computer with trepidation. Would it turn on? And happily, it did!! Here I am, several years later, typing this comment on that very same computer.
The next day, I went online and bought some tweezers with PVC ("rubber") tips, rather than metal tips with plastic caps. Specifically, this and this.