this post was submitted on 28 Jul 2025
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I haven't seen a PC that would actually have audible post codes in a very long time. Nowadays it's usually LEDs, or a very simple little display.
Its a little cylinder with 2 wires leading to the mobo. Not for error codes but for the 'beep' that happe is when you turn on computer. Is that not a thing any more?
Nope. At least, not that I've seen even slightly recently. I got into PCs ~15 years ago, and they were already becoming a lot less common then. It probably still exists in some niche way, that's usually how it goes. Maybe HP still uses them or something like that.
Sorry if any of this is stuff you already know: The beep is a POST code- power on self test. That beep when you turn on the computer is basically the computer saying, "everything started correctly, from here on it's probably a software problem."
If there is a problem and your motherboard can figure out what it is- bad cpu, bad ram, no video, etc- it gives a POST code via the little speaker. It's a nice troubleshooting tool, because a lot of the time the hardest part of the fix is figuring out what part is the problem.