Tip & How-To about Computers & Internet

Computer POST and beep codes The computer power on self test (POST) will test your computer to make sure it can boot properly(test hardware and sys requirements), once it does the computer will then finish the boot process. Normally, if your computer passes the POST test it will beep once or possibly twice. If the computer fails the POST then it will either not beep at all or generate a beep code. The beep code you receive can indicate what may be wrong with your computer. The beep codes vary depending on your motherboard BIOS manufacturer(AMI, Award, Phoenix). You can find what BIOS you are using by paying attention to the BIOS screen when your computer boots up. It should tell you what brand BIOS. You can usually find the meaning of your beep code by doing a simple google search i.e "phoenix beep codes". Below, I have provided links to sites which go over beep codes and their respective meaning. AMI BIOS Beep Codes Award BIOS Beep Codes Phoenix BIOS Beep Codes -G33k Keywordscomputer beep codes, post beep codes, bios beep codes, computer beeps, computer will not start beeps, computer beeping, pc beep codes, award beep codes, phoenix beep codes, Ami beep codes

Computers & Internet Logo

Related Topics:

Related Questions:

1 Answer

black screen green dots


What was the last thing you did on your computer before this happened?
Did you change any system settings in the BIOS?
Did you add new software? or update any software or drivers?
Did you add any new hardware?
Is your system BIOS infected with a virus?
Because it appears that your PC is hanging up during the Power-On-Self-Test [POST]

Here's what happens; when the power is turned on, the computer BIOS [Basic Input/Output System] runs a POST (Power-On Self-Test). It is a diagnostic testing sequence that the computer runs to determine if the hardware [like the mouse, keyboard, hard drive, etc.] is working properly.

If the necessary hardware is detected and found to be operating properly, the computer begins to boot; If the hardware is not detected or is not operating properly, the BIOS issues an error message.

The error message may be a text on the display screen and/or a series of coded beeps, depending on the nature of the problem.

The series or pattern of beeps may vary...they may be in a number of long or short beeps or a mixture of long and short beeps, or even one long continuous beep, depending on what type of BIOS is installed.

Since POST runs before the computer's video card is activated or the integrated graphic chip on the main board, it may not be possible to progress to the display screen.

So if an error is detected during the POST it will halt the boot process because the hardware is essential for the computer's functions.

How many beeps do you hear during the initial POST?

You may have a burned out video chip/card; or corrupt drivers; or even an IRQ [Interrupt Request] conflict.

Nov 26, 2013 | Acer Computers & Internet

1 Answer

no boot - short beep, long beep (it is not a memory problem)


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 beeps.
There are short and long beeps.
Write down your observations.
Write down the BIOS type if this information is on your screen.
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.
http://www.pcguide.com/ts/x/sys/beep/index.htm
http://www.5starsupport.com/info/beep_codes.htm
http://www.pchell.com/hardware/beepcodes.shtml

Aug 25, 2013 | HP Pavilion p6716f-b Desktop PC & 20 Inch...

1 Answer

Display problem, CPU Fan starts but no Power on self test begin. Pls help


The computer power-on self-test (POST) tests the computer to make sure it meets the necessary system requirements and that all hardware is working properly before starting the remainder of the boot process. If the computer passes the POST the computer will have a single beep (with some computer BIOS manufacturers it may beep twice) as the computer starts and the computer will continue to start normally. However, if the computer fails the POST, the computer will either not beep at all or will generate a beep code, which tells the user the source of the problem. Once the problem is located, simply replace the defective part.
Below are the AMI BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary.
Beep CodeDescriptions1 shortDRAM refresh failure2 shortParity circuit failure3 shortBase 64K RAM failure4 shortSystem timer failure5 shortProcess failure6 shortKeyboard controller Gate A20 error7 shortVirtual mode exception error8 shortDisplay memory Read/Write test failure9 shortROM BIOS checksum failure10 shortCMOS shutdown Read/Write error11 shortCache Memory error1 long, 3 shortConventional/Extended memory failure1 long, 8 shortDisplay/Retrace test failed

Jul 27, 2011 | Gigabyte Computers & Internet

1 Answer

computer beeps, minor flash on the screen, then shuts off


Computers follows a process which what we call P.O.S.T (Power On Self Test) to tests the computer to make sure it meets the necessary system requirements and that all hardware is working properly before starting the remainder of the boot process. If the computer passes the POST the computer will have a single beep (with some computer BIOS manufacturers it may beep twice) as the computer starts and the computer will continue to start normally. However, if the computer fails the POST, the computer will either not beep at all or will generate a beep code, which tells the user the source of the problem.

It depends on how long or how short or how many beeps did you hear to determine which hardware component in your computer is failing.

Here is a helpful link that you can check and follow for you to determine which hardware is failing in your computer.

After determining which hardware it is, I would recommend that you consult a Local Technician near your area, although, if this Acer Aspire is still under warranty with Acer, it will be better to contact them so that they can have whichever hardware part replaced.


Hope this information is helpful!

Apr 07, 2011 | Acer Aspire 9300-5005 Notebook

1 Answer

I get one long beep and one extra long beep on startup. Computer just beeps and nothing else.


The computer POST (Power On Self Test) tests the computer, insuring that it meets the necessary system requirements and that all hardware is working properly before starting the remainder of the boot process. If the computer passes the POST the computer will have a single beep (with some computer BIOS manufacturers it may beep twice) as the computer starts and the computer will continue to start normally. However, if the computer fails the POST, the computer will either not beep at all or will generate a beep code, which tells the user the source of the problem.

This issue can be caused by any of the below situations.
  1. New hardware conflicting with old hardware.
  2. Bad or failing hardware device.
  3. Connections not connected or connected properly.
  4. Recent electrical storm that caused a surge that damaged computer.
  5. Other hardware issue.
you can determine the meaning of your beeps finding out with your BIOS System installed on your machine.


Usually you probably have some memory problem.

Oct 26, 2008 | HP Computers & Internet

Not finding what you are looking for?

13,989 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

kakima

Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Loading...