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A Comprehensive Guide on Computer Beep Codes. (AWARD BIOS)

When a computer is booted up its BIOS, it performs a power-on self test, also known as POST, to test and verify the computers hardware and to make sure all components are working properly. Here's a comprehensive guide on how to determine which component has failed on a particular beep code and give you an idea on where to start for troubleshooting.

The exact meaning of the beep codes depends on the type and version of BIOS that you have. The three most popular types of BIOS are those made by Award, American Megatrends (AMI) and Phoenix. If you are using a PC made by a company that writes its own BIOS, e.g. DELL, HP, etc, you will have to consult your PC user's manual or the company's web site for assistance.


Beep Codes for Award Bios.



1 long, 2 short = Video adapter error

Troubleshooting: Either video adapter is bad or is not seated properly.

Repeating (endless loop) = Memory error

Troubleshooting: Check for improperly seated or missing memory. Reseat the memory if you can.

1 long, 3 short = No video card or bad video RAM.

Troubleshooting: Reseat or replace the video card.

High frequency beeps while running = Overheated CPU

Troubleshooting: Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low = CPU failure.Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat.

Troubleshooting: Check the CPU fan or BIOS settings for proper fan speed.


I will be posting more tips on other versions of BIOS.
Hope this helps.

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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

2 Answers

system hangs after 5 minute 0f os Ubuntu


The issue might be due hardware malfunction or lack of system performance or corrupt os.

perform hard drive self test:
Hard Drive Self Test:
1. If the notebook computer is running solely on battery power, plug the AC adapter into the notebook.
2. Shut down the computer if it is running.
3. Press the power button to turn on the computer.
4. Press f10 when the HP/Compaq logo displays.
5. After the BIOS Setup Utility displays, use the Right Arrow key to select the Diagnostics menu.
6. Select HDD Self-Test options .
7. Press enter to display a list of HDD/Self-Test options.
8. Select Notebook Hard Drive and then press f10 to display an Estimated test time .
9. Press f10 to continue. The Hard Drive Self Test executes a Quick test , a Comprehensive test, and a SMART test.

If test pass then perform below steps:
Improve system performance:
Follow the steps provided in the below url:
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00815926

if persists, restore the ntoebook to factory settings.following below steps in the url
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00809678&product=18703:

Mar 26, 2010 | HP Pavilion dv9000z Notebook

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