Indeed. Back in my noobish days I went and used another PSU to test if the PSU whas the issue why my PC suddenly didn’t boot anymore.
The PSU was ancient, came from my first PC, and probably woefully underpowered.
Connected the wires, plugged it in, and pressed the power button.
An extremely loud bang, beeping ears, and a quick run outside with the thing, and I’m a lot more careful with electronics now >.>