Blinking EVGA logo on power supply implies short-circuit

After installing a new motherboard and switching on my EVGA power supply, the green EVGA logo started blinking instead of showing a solid color. In this case, it turned out the issue was that there was a short-circuit caused by an errant piece of metal from my case that apparently shorted out something on the motherboard.

Unfortunately, I only figured this out after removing each component/connection one by one. Even with only the 24-pin ATX power connector, I still had this problem. Initially, I thought the motherboard was dead, but after removing it entirely from the case and plugging in power the problem went away. I then found an unluckily bent piece of metal (from some sort of too-small-to-be-useful SSD holder) that had likely been touching the motherboard. After removing that piece and putting everything back together, I had a working computer. I guess I'm lucky that my power supply detected this issue instead of just frying my motherboard (or possibly me)!