Have you ever booted up your computer and all you hear is a “non-stop beep”? You’ve probably been there, and I’ve probably been there too. However, don’t worry, all is not lost! All those annoying beeps are actually like Morse code in the BIOS language .
Every time you turn on your computer, it runs a program called POST , which stands for Power On Self Test . This quick test is your computer's way of making sure everything is working properly before it starts up—much like NASA engineers check all their rockets before launch.
While the POST is running, you can actually see the results on your screen, provided it's working. It's like the computer is taking an inventory of all the connected devices. However, this visual display of the results isn't very helpful if there's no signal reaching the screen, so BIOS manufacturers have come up with a system of beeps that act as a diagnostic guide. Some motherboards also display a two-digit code on the board itself (see photo).
There's only one good beep: The one and only beep that you heard when you turned on your computer, in the good old days, telling you that everything was fine. These days, most computers don't have speakers on the motherboard (mainboard), so we don't hear any sounds unless there's a problem.
The first and most important step is to note the pattern of beeps. It could be a long beep or a short one followed by a long one, and so on. It varies depending on the case. Note the number and duration of the beeps, then head to your motherboard or manufacturer's website or search for the pattern online. For your convenience, here are some links with explanations of the beep codes for Dell, HP, Lenovo, Asus, Gigabyte , and MSI.
Once you've deciphered this code, you'll probably be pretty close to understanding your problem. The last thing to remember is that these kinds of sounds often come when you make a change to your computer—a new USB, for example, or a new hard drive. If that's the case, the first thing to do is double-check your cables and connections. The culprit is usually a RAM stick that's not properly seated. If the beeping persists, undo whatever upgrade you made. If it goes away, you've found the culprit. Reinstall and see how it goes!
