If you build your own PC, POST is your basic smoke test that everything is plugged in and functioning as expected.
And if you didn't build your own PC, well, stuff fails and POST can tell you what's wrong. And it's fine if that stuff isn't important to you, but its better to have these tools and not need them instead of the other way around.
And if you didn't build your own PC, well, stuff fails and POST can tell you what's wrong. And it's fine if that stuff isn't important to you, but its better to have these tools and not need them instead of the other way around.