Author Topic: BIOS Beep Codes  (Read 1743 times)

Offline NI4NI

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BIOS Beep Codes
« on: April 03, 2005, 05:43:28 PM »
What do those beeps mean?

Those beeps are called the BIOS beep code. It is an audible code that may beep in a specific pattern to indicate what the problem may be with the system. When the computer system is starting to boot up it performs a "Power On Self Test" or the "POST." At the completion of the POST if there are no problems detected there is usually a short beep and the operating system is loaded.

During the POST, if there is a problem starting the system there may be a visual error message on the display as well describing the problem.

If the problem is happening before the video is initialized than the BIOS will play audible beeps to let you know there is a problem. The beep codes can be difficult to determine what they mean. You need to listen carefully for the beeps to determine what the pattern may be.

AMI and Award are the most common BIOS' at this time. They are writing the BIOS for most motherboard manufacturers as well as custom BIOS' for the majority of computer manufacturers. Below is a list of some of the most common AMI and Award BIOS beep codes. Depending on the type of BIOS you have or the brand of your computer there may be different beep patterns. However, manufacturers of motherboards and the BIOS companies usually have copies of the code for your specific motherboard and BIOS.

AMI BIOS Beep Codes:

Beeps - Error Message - Description

1 short - DRAM refresh failure - The programmable interrupt timer or programmable interrupt controller has probably failed.

2 short - Memory parity error - A memory parity error has occurred in the first 64K of RAM. The RAM IC is probably bad.

3 short - Base 64K memory failure - A memory failure has occurred in the first 64K of RAM. The RAM IC is probably bad.

4 short - System timer failure - The system clock/timer IC has failed or there is a memory error in the first bank of memory.

5 short - Processor error - The system CPU has failed.

6 short - Gate A20 failure - The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller.

7 short - Virtual mode processor exception error - The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry.

8 short - Display memory read/write error - The system video adapter is missing or defective.

9 short - ROM checksum error - The contents of the system BIOS ROM does not match the expected checksum value. The BIOS ROM is probably defective and should be replaced.

10 short - CMOS shutdown register read/write error - The shutdown for the CMOS has failed.

11 short - Cache error - The L2 cache is faulty 1 long, 2 short - Failure in video system An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered.

1 long, 3 short - Memory test failure - A fault has been detected in memory above 64KB.

1 long, 8 short - Display test failure - The video adapter is either missing or defective.

2 short - POST Failure - One of the hardware tests have failed.

1 long - POST - All tests passed.

Award BIOS Beep Codes:

Beeps - Error Message - Description

1 long, 2 short - Video adapter error - Either video adapter is bad or is not seated properly. Also, check to ensure the monitor cable is connected properly.

Repeating (endless loop) - Memory error - Check for improperly seated or missing memory.

1 long, 3 short - No video card or bad video RAM - Reseat or replace the video card.

High frequency beeeps while running - Overheated CPU - Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low - Either the CPU is not seated properly or damaged. May also be due to excess heat. - Check the CPU fan or BIOS settings for proper fan speed.
« Last Edit: December 31, 1969, 05:00:00 PM by NI4NI »