Motherboard Beep Codes [Meaning And Definition 2024]

Written By Farhan Max

Motherboard manufacturers include beep codes in their motherboards to ensure that all computer hardware is functioning correctly before the computer powers up.

However, there are numerous different beep codes, each with its own meaning and pattern.motherboard-beep-codes

So in this article, I will explain all of the beep code patterns and their meanings.

Let’s get started.

Why do Beep Codes Exist in Computers?  

Beep code exists in computers to ensure that all computer components are operational before powering up. Beep codes typically detect faults with the CPU (Processor), Motherboard, RAM (Memory), as well as Video Card and provide signals via beep sounds.

Before diving into the beep codes, it’s essential to understand a procedure known as POST or Power-on-self-test. BIOS collects data on the significant parts of the system and runs a unique diagnostic test known as the Power On Self Test to ensure that each device is correctly operating.

It’s similar to a computer analytical exam. If the BIOS detects a hardware failure during this assessment, it will display a warning message known as a POSTCODE on the screen.

Nevertheless, the fault will not be visible if the mistake occurs within the POST phase before any displaying message is sent.

When a computer is unable to provide a visual signal, it will deliver beep codes as an audio signal to warn the user of a problem found within the components.

What do Motherboard Beep Codes Indicate?

Motherboard beep codes indicate different types of hardware failures in computers. The sound pattern varies depending on the hardware that isn’t working correctly. Motherboard manufacturers use various beep patterns for their beep signals.

Note: Before the beep codes seem reasonable, you must understand your BIOS model. Because only Dell and Apple build their own motherboards and BIOS, other manufacturers utilize separate BIOS for their motherboards.

If your computer won’t boot up and makes beep sounds, use the list below to figure out what the beep pattern signifies and take appropriate action.

Here’s what the different BIOS beep code pattern means:

Beep Codes for AMI BIOS

AMI BIOS is a primary input/output module (BIOS) microchip created and marketed by American Megatrends Inc. It utilizes different beep patterns to indicate computer hardware issues.

Here are the beep codes for AMI BIOS: 

Beep CodeExplanationSolution
1 BeepFailure to RefreshChange memory and diagnose the motherboard.
2 BeepsFailure of the integrity circuit.Reinstall memory and inspect the motherboard.
3 BeepsProblem in Memory (first 64KB).Memory should be reseated or replaced.
4 BeepsBreakdown of the system timer.Examine the motherboard.
5 BeepsCpu malfunction.Examine the Processor and the motherboard.
6 BeepsFailed Keyboard InterfaceExamine the keyboard and the circuit.
7 BeepsException problem in Virtual ModeDiagnose the motherboard and Processor.
8 BeepsGraphical memory Testing failure for read/write operation.Repair the motherboard and video card.
9 BeepsError in ROM BIOS Cryptographic signature.Check the motherboard and change the ROM BIOS.
10 BeepsFailed CMOS Shutdown Register.Examine the motherboard and replace the CMOS battery.
11 BeepsL2 Cache ErrorInvestigate the motherboard and L2 cache.
Continuous BeepsFailures in memory or videos.Examine the motherboard, video card, and RAM.
1 lengthy and 2 short beepsMemory problem with the graphics card.Check the video card and replace it with a higher-memory graphic card.
1 lengthy and 3 short beepsFailure of traditional/extended memoryExamine the Memory and troubleshoot the motherboard.
1 lengthy and 8 short beeps.The display/retrace test was unsuccessful.Examine the display and reconnect it.
Siren with two tonesWeak CPU fan velocity, voltage level problem.Examine the power source and the fan.

Beep Codes for Dell BIOS

Dell BIOS includes UEFI programming, which is loaded on a tiny microchip on a computer’s mainboard. It uses a brief beep sequence to indicate computer hardware problems.

The following are the Dell BIOS beep code patterns: 

Beep CodeExplanationSolution
1 BeepBIOS ROM damage or malfunction.Reset the jumper and replace the CMOS battery.
2 BeepsMemory (RAM) is not recognized.Replace or reinstall RAM.
3 BeepsMotherboard malfunction.Troubleshoot the motherboard.
4 BeepsFailure of the memory (RAM).Examine and troubleshoot the RAM.
5 BeepsCMOS battery malfunction.Inspect and replace the CMOS battery.
6 BeepsFailure of the graphics card.Check and replace the video card.
7 BeepsProcessor failure (CPU).Examine and change the processor.

Beep Codes for Award BIOS

Award BIOS is designed by Award Software, which was later purchased by Phoenix Technologies. It combines two distinct types of beeps to identify computer hardware faults.

Here are the beep code patterns for Award BIOS:  

Beep CodeExplanationSolution
1 lengthy and 2 short beepsShows that a visual fault has happened and that the BIOS cannot configure the video feed to present any extra information.Examine the video output and troubleshoot the motherboard.
1 lengthy and 3 short beepsGraphics card was not identified.Reinstall the video card.
Beeps that never stopMemory (RAM) errors.Reinsert the RAM or change it.
Repeatedly loud beeps while the computer is runningProcessor (CPU) overheating.Change thermal paste or improve air circulation.
Repeating high- and low-frequency beep soundsPotentially malfunctioning processor (CPU) problems.Examine and change the processor (CPU).

Beep Codes for IBM BIOS

IBM uses UEFI-based BIOS, just like Dell BIOS. It uses a combination of long and short beep patterns to identify computer errors.

The IBM BIOS beep code patterns are as follows:

Beep CodeExplanationSolution
1 BeepFine POST, PC is operational.None
2 BeepsPOST problem. Look at the screen for the error code.Look at the computer display to find out the error text.
Continuous beepThere is no energy, loose cord.Check your power source and loose cable.
1 lengthy beep and 1 short beepA problem with the motherboard.Examine and troubleshoot the motherboard.
1 lengthy beep and 2 short beepsProblem with the video (Mono/CGA display circuits).Check display output.
1 lengthy beep and 3 short beepsError in the video (EGA) display circuitry.Troubleshoot video adapter.
3 long beepsProblem with the keyboard or keyboard card.Examine and change the keyboard.

Beep Codes for Insyde BIOS 

For many years, Insyde BIOS has been a prominent supplier of UEFI BIOS and system administration software. It utilizes a series of beep patterns to identify a computer’s hardware fault.

The beep patterns for the Insyde BIOS are listed below:  

Beep CodeExplanationSolution
5 short beeps and 1 lengthy beep..There is an issue with the DMA page registries.Reset DMA page registries.
4 short beeps, 1 lengthy beep, and 1 short beep.The circuitry for reloading RAM is not functioning.Troubleshoot the motherboard and examine the RAM.
4 short beeps and 2 short beepsBIOS ROM checksum error.Troubleshooting the motherboard.
3 brief beeps, 1 long beep, and 2 short beeps.Failure of the CMOS RAM check.Check the motherboard.
3 short beeps, 1 long beep, 1 short beep, 1 long beepFailure of the DMA controllerReset DMA controller.
3 short beeps, 2 lengthy beeps, and 1 short beepInterrupt controller malfunction.Reconfigure controller.
3 short and 3 lengthy beepsProblem with the keyboard's self-test.Reinstall the driver and examine the motherboard.
2 brief, 1 long, and 3 short beepsNo graphics card was detected.Reinsert the graphic card or Troubleshoot PCI slots.
2 short beeps, 1 long beep, 2 short beeps, 1 long beepRAM is not connected or is not detected.Changing the RAM slot and switching the RAM.

Beep Codes for Macintosh

Although Macbooks do not include BIOS, they do feature an identical boot program known as Open bios. They perform the same function as BIOS. Instead of beeps, Mac uses tones.

Here are the beep code patterns for Macintosh:  

Beep CodeExplanationSolution
Error sound with two distinct types of notesIssue with the motherboard or on the SCSI bus.Troubleshoot the motherboard.
There is no display, only a startup sound, and drive spins.There is an issue with the display controller.Examine the video controller or repair it.
Powers are turned on, but there is no toneAn issue with the logic board.Troubleshoot or change the motherboard.
Four louder tonesSIMM issue.Reset SIMM.

Beep Codes for Phoenix BIOS

Phoenix became the first business to commercially create the BIOS for the Computer, creating the way for the Computer industry. It employs a multiple-beeping sequence to identify system errors.

The Phoenix BIOS tone code patterns are shown below:

Beep CodeExplanationSolution
1-1-1-1RAM issue.Reinsert or change RAM modules.
1-1-1-3Check the genuine mode.None.
1-1-2-1Determine the CPU type.None.
1-1-2-3Set up the system hardware.None.
1-1-3-1Set the first POST settings in the chipset registers.None.
1-1-3-2Activate the POST flag.None.
1-1-3-3Set up the CPU registers.None.
1-1-4-1Set up the CPU registers.None.
1-1-4-3Set the cache to the default POST values.None.
1-2-1-1Set up I/O.None.
1-2-1-2Set up power management.None.
1-2-1-3Load original Post data into other registers.None.
1-2-2-1Navigate to UserPatch0.None.
1-2-2-3Set up the keyboard controller.None.
1-2-3-1Checksum for the BIOS ROM.None.
1-2-3-3Set up the 8254 timer.None.
1-2-4-1Set up the 8237 DMA controller.None.
1-3-1-1Reload the programmable interrupt controller.None.
1-3-1-3Examine DRAM refresh.None.
1-3-2-1Verify 8742 keyboard controller.None.
1-3-3-1Setup the ES section to register 4 GB.None.
1-3-3-3DRAM autosizing.None.
1-3-4-1Wipe the 512K base RAM.None.
1-3-4-3Check 512 core address lines.None.
1-4-1-3Evaluate 512 K main memory.None.
1-4-2-4Check the frequency of the CPU bus clock.None.
1-4-3-1Reconfigure the chipset.None.
1-4-3-2BIOS ROM for the shadow system.None.
1-4-3-3Reinstall the cache.None.
1-4-4-1Cache auto-sizing.None.
1-4-4-2Setup advanced chipset registers.None.
2-1-1-1Refill alternate registers with CMOS data.None.
2-1-1-3Set the starting CPU speed.None.
2-1-2-1Set the interrupt vectors.None.
2-1-2-3Setup BIOS interrupts.None.
2-1-2-4Examine the ROM Copyright notice.None.
2-1-3-1Set up the manager for PCI option ROMs.None.
2-1-3-2Verify the video setup against the CMOS.None.
2-1-3-3Set up the PCI bus and devices.None.
2-1-4-1Configure all of the system's video adapters.None.
2-1-4-3Shadow video BIOS ROM.None.
2-2-1-1Show copyright notice.Check the registry and reset it.
2-2-1-3Showing a copyright notice.Troubleshoot registry.
2-2-2-1Show the CPU kind and frequency.None.
2-2-2-3Check the keyboard.None.
2-2-3-1If activated, configure key click.None.
2-2-3-3Turn on the keyboard.None.
2-2-4-1Examine for unexpected interruptions.None.
2-3-1-1Show a message Enter SETUP by pressing F2.None.
2-3-1-3RAM within 512 and 640 k should be tested.None.
2-3-2-1Experiment with extended memory.None.
2-3-2-3Measure the length of the memory address lines.None.
2-3-3-1Navigate to UserPatch1.None.
2-3-3-3Set up the advanced cache registers.None.
2-3-4-1Activate the CPU and external caches.None.
2-3-4-3Show external cache size.None.
2-4-1-1Show shadow message.None.
2-4-1-3Show non-disposable segments.None.
2-4-2-1Show error messages.None.
2-4-2-3Look for configuration mistakes.None.
2-4-4-1Examine the real-time clock.None.
2-4-4-3Verify for keyboard mistakes.None.
3-1-1-1Configure the hardware interrupt vectors.None.
3-1-1-3Examine the coprocessor if any.None.
3-1-2-1Deactivate the internal I/O ports.None.
3-1-2-3Find and install any external RS232 ports.None.
3-1-3-1Discover and set up external parallel ports.None.
3-1-3-3Reset the internal I/O ports.None.
3-1-4-1Set the BIOS data area to zero.None.
3-2-1-1Activate the enlarged BIOS data area.None.
3-2-1-2Set up the floppy controller.None.
3-2-1-3Activate the hard disk controller.None.
3-2-2-1Set up the hard disk controller on the local bus.None.
3-2-2-3Navigate to UserPatch2.None.
3-2-3-1Turn off the A20 address line.None.
3-2-3-3Eliminate the large ES segment register.None.
3-2-4-1Look for alternative ROMs.None.
3-2-4-3Shadow ROM options.None.
3-3-1-1Configure Power Management.None.
3-3-1-3Turn on hardware interruptions.None.
3-3-3-1Specific time of day.None.
3-3-3-3Test the key lock.None.
3-3-4-1Remove the F2 prompt.None.
3-3-4-3Check for the F2 keystroke.None.
3-4-1-1Start the CMOS setup.None.
3-4-1-3POST flag clearedNone.
3-4-2-1Verify for mistakes.None.
3-4-2-3After POST, get ready to boot the OS.None.
3-4-3-1One beep.None.
3-4-4-1Verify password.None.
3-4-4-3Deleting the global descriptor tableNone.
3-4-4-4Uncluttered parity checkers.None.
4-1-1-1Clear display.None.
4-2-1-1Verify the backup and virus alerts.None.
4-2-1-3Attempt to boot using INT 19.None.
4-2-2-1Error handling interrupts.Examine registry.
4-2-2-3Unidentified interrupt errorTroubleshoot the motherboard.
4-2-3-1Unresolved interrupt problem.Check connectivity.
4-2-3-3Problem in initializing the ROM option.Change the motherboard or troubleshoot it.
4-2-4-1Problem in shutdown.Change the RAM slot or change it.
4-3-1-3Stretched block movement.None.
4-3-1-4Problem 10 in shutdown.Replace memory or change slot.
4-3-2-1Chipset initialization.None.
4-3-2-2Start the refresh counter.None.
4-3-2-3Verify for forced flash.None.
4-3-2-4Verify the ROM's HW condition.None.
4-3-3-1Everything is good with the BIOS ROM.None.
4-3-3-2Run a thorough RAM test.None.
4-3-3-3Initialize the OEM.None.
4-3-3-4Prepare the interrupt controller for use.None.
4-3-4-1Interpret bootstrap code.None.
4-3-4-2Initiate each vector.None.
4-3-4-3Start the flash application.None.
Two-tone sirenIssues with voltage level and low CPU fan speed.Examine the power supply and check cable connectivity.

What are the Alternatives to Motherboard Beep Code?

LED indicator lights are alternatives to motherboard beep codes. The LED indicator lights scan the computer for hardware problems and display the problem by blinking the LED light. LED lights are positioned on the bottom of the components depending on the parts.

When a user starts his computer, the LED light begins to blink, but this is not a warning. If any of the components fail, the LED light will turn on and stay on until the user resolves the problem. Typically, an LED light will turn red when it detects a hardware issue with the computer. led-code

The following are the LED light indicator meanings for various components:

Red Light Meaning Solution
BootThis indicates that there is an issue with the hard drive/SSD.Remove and reconnect the HDD/SSD.
VGAShows that the video card has not been identified.Reinstall your video card.
DRAMThis signifies that no RAM is connected.Reinstall your RAM.
CPUIt can imply anything ranging from a power outage to faulty connections.CPU should be reseated or replaced.


Knowing the motherboard beep codes can significantly help users understand their hardware problems and solve them based on the codes.

So, in this article, I’ve gone over each BIOS code available for motherboards and the solutions to the problems that match the code.

If you have any questions or feedback about this topic, feel free to share them in the section below.