Beep codes are used by the BIOS during the POST to report certain initial system errors. Listen very carefully to the beep codes that sound when the computer begins to boot. Write down, in whatever way makes sense to you, how the beeps sound. Important: Pay close attention to the number of beeps, if the beeps are long or short and if the beeping repeats or not. There is a big difference between a "beep-beep-beep" beep code and a "beep-beep" beep code. What steps you take to solve a particular beep code will differ depending on the laptop manufacturer. So posting your laptop make year and model is also required.