You need to provide more information about the system (such as make and model) for people to be able to help you with beep codes. lonewolf is correct: beep codes are generated to notify a person of a hardware malfunction. Beep codes vary from system to system, however.
You can also contact the technical support of your laptop manufacturer, or look for a user's manual (often a free PDF file for download) and reference that.
Can't find your answer ? Ask !
Read discussions in other Laptop Tech Support categories