When your computer boots up, the Basic Input-Output System
(BIOS) performs an all-systems Power On Self-Test (POST).
The POST tests your computer's most important components,
including the motherboard itself, the system's memory and the video card.
If the computer deviates from its standard beep, it may
indicate a very serious problem with your computer, or it may simply indicate
that you need to replace a system fan or a memory stick. BIOS beep codes vary
according to manufacturer.
Start your computer.
Pay attention to the number of beeps and the length of the
There are short and long beeps.
Write down your observations.
Write down the BIOS type if this information is on your
Consult your computer documentation if you don't know what
type of motherboard you have.
Visit your computer manufacturer's support website for your
computer model if you purchased a pre-built machine.
Look up your BIOS manufacturer (AMI, Award and Phoenix,
for example) at a BIOS beep code website such as 5StarSupport, PC Hell or PC
Guide (see Below).
Match the your computer's beep code with the beep code
listing for your BIOS manufacturer.