Today I encountered such a problem, the speaker gives out “One long and three short BIOS signals”, the most interesting thing is that similar signals have been encountered before, but usually after 2-3 minutes of computer operation, the system still booted. To be more precise, the system is already loading, you can hear it when loading hard drive, and sound greeting from the operating room Windows systems 8, but the monitor does not want to show the picture.

This problem definitely had to be solved by "opening" system unit, since one long and three short signals BIOS AMI means problems with the video card.

And so let's get started:

1. Disconnect all wires from the system unit and place it in a place convenient for “Opening”. The figure shows a video card with a disconnected wire leading to the monitor.

2. Open the cover of the system unit, usually there are two bolts on the left wall.

3. Unscrew the video card and turn off the additional power (see Figure).

4. Alternatively, connect it to another slot, or install a new video card. You can, of course, try to clean the computer from dust, sometimes it helps. Since you have decided to get into the system unit, I would not put off cleaning it.

4. Connect the wires and turn on the computer.

I did not close the cover of the system unit, this procedure is often erroneous, but in the end the video card worked. I didn’t dig around and figure out further why such a problem arose, since I work mainly on a laptop.

If it doesn't help:

1. Try changing the wire from the monitor to the video card, or better yet, plug it into the video card.
2. If the video card has two connectors on the outside of the case, plug the wire into the second one.
3. Take your video card to a friend for testing. Let him put him in his place.
4. Remove dust from the cooler and wipe the video card with a cloth.
5. Check the additional power from the power supply to the video card. Perhaps there is not enough power.

Good luck! By the way, in Award BIOS, 1 long and three short beeps mean the same thing - a problem with the video card.

If the computer refuses to start, you can try to determine the reason by looking at the signal from the motherboard. When a hardware error occurs, the PC sends signals to the standard PC speaker that can be deciphered.

First you need to determine the BIOS type. This is necessary because the PC with different BIOS have different encoding signals. To determine the BIOS, when you boot your computer, you need to pay attention to the first thing that appears on the screen - this is the name BIOS. If you don't have time to look, go to CMOS SETUP using the DEL key. Usually the BIOS brand is written at the top. If your monitor refuses to display an image on the screen, you will have to climb inside the PC and look for the BIOS chip on motherboard and look at the name on it.

Below I will provide transcripts of the signals known to me from various BIOSes.

AMI BIOS.

Signal
	When the computer boots, at least one signal should be heard; if there is none, either the speaker is disabled or faulty, or the motherboard does not start at all.
	One signal means that initialization was successful. If the image does not appear on the monitor, check whether the monitor is connected to the video card (video card to motherboard). If so, try removing the RAM boards, putting them back in place, and rebooting.
	RAM recognition error. Basically the same as 2 signals.
	Basically the same as 2 signals. The timer may also be faulty.
	Processor error.
	Keyboard controller error. The chip responsible for the keyboard is not functioning properly. The keyboard may be faulty. If the keyboard controller chip is removable, you can try replacing it.
	Processor error. The processor may have burned out.
	Video card error. The video card may have burned out.
	ROM error. BIOS burned out.
	CMOS error. Your problem is in CMOS. All chips associated with CMOS must be replaced.
	Your Cache memory has failed and has been disabled by the computer.

Phoenix BIOS.

When you turn on a working PC, after a few seconds, one short signal is heard, which should please the ears of any user.

Signal (sequence of short signals)	Decoding, solutions
	The BIOS must be replaced.
	The timer on the mother does not work.
	The mother is out of commission.
	The mother is out of commission.
	The mother is out of commission.
	Error checking RAM. Memory problems. Let's check the video first. If it works, you will see an error message on the screen. Check the RAM boards. Take them out and put them back. Try moving the RAM board to an adjacent slot.
	Mother is out of order
	Mother is out of order
	Not functioning RAM.
	Any set of signals after two short ones means that the RAM is faulty.
	One of the motherboard chips is not functioning.
	The computer cannot find the video card. You can try putting the video card in a different slot.
	Video card error.
	The chip on the motherboard is faulty.
	Keyboard or input controller error.
	Same as 4-2-2
	One of the boards in the computer is not working.
	Mother is out of order
	See 4-3-1.
	See 4-3-1.
	Date and time counter error. Go to Setup and set the time again. The CMOS battery may be dead.
	Serial port (COM) error
	See 4-4-1
	Math coprocessor error.

AWARD BIOS.

Signal	Decoding, solutions
1 short
2 short	CMOS error. Go to Setup and install everything again. Check the voltage on the CMOS battery and replace the battery if necessary.
1 long - 1 short	RAM error.
1 long - 2 short	Video card error. Pay attention to the quality of the connection.
1 long - three short	Keyboard controller error.
1 long - 9 short	ROM (BIOS) error.
Looping long	The RAM board is installed incorrectly.
Looped short	Power supply error.

Most people paid attention to the fact that when the computer is turned on, before the OS starts loading, there is always a beep. Normally, this is a short beep, indicating that testing of PC components (Power On Self Test, or POST) completed without errors. If any problems are detected in the components, the computer will let you know about it using a specified number of short or long beeps. Correctly decoding the signal, you can find out exactly what kind of failure occurred in your PC.

BIOS beeps

As a rule, any working computer emits a short beep before starting to boot - this nuance common to all types of motherboards and BIOS configurations. In some cases, it happens that the sound signal is not heard at all - this means that the manufacturer of your device decided to save a little money and did not equip the PC with a system speaker. For a working computer, this is not such a big problem, but in the event of a serious malfunction, you will not be able to understand the essence of the problem and fix it without the intervention of specialists.

If problems are detected in the operation of the hardware, BIOS starts making certain sounds, designed to tell the user exactly where the problem lies. The sequence of these signals varies, and in order to correctly decipher them, you need to know the BIOS manufacturer of your specific motherboard. Of course, the easiest way is to get the instructions for the motherboard, but what to do if for some reason it was not saved?

How to find out the BIOS manufacturer

There are several ways that are installed in the system:

Decoding BIOS signals

Once you have found out the manufacturer of your BIOS, you can proceed directly to deciphering the sound signals.

AMI

Sequence of sounds	Decoding	User Actions
One short	The computer is working fine, no critical problems were found	Wait for loading operating system and work calmly.
Two short	Either you forgot to turn on the scanner/printer, or there is a RAM parity error	Check and, if necessary, turn on the appropriate equipment. If there are several RAM sticks in the system, remove them, clean the connector from dust, wipe the contacts with a soft eraser and try to insert them one by one. The PC will boot with a working stick, but with a faulty one it will emit an error signal again.
Three short	Error in the first 64 KB of RAM	Try resetting the BIOS settings using a special jumper on the motherboard.
Four short	System timer failure	Remove all the boards from the motherboard, except the video card, and insert them back one by one, thus identifying the problem one. Reset BIOS settings.
Five short	Processor problems	If you have recently purchased new processor, make sure it is compatible with your motherboard.
Six short	Keyboard initialization error	Reconnect the keyboard to the PC. If the error persists, try replacing the keyboard - it may be faulty. If, when you connect a new, known working device, the computer continues to emit the same signal, take the motherboard for repair - most likely the problem is there.
Seven short	Motherboard error	The algorithm of actions is the same as with four short signals.
Eight short	Video card failure	If you are using a discrete graphics card, remove it and try booting your PC with the built-in one. If the download went without problems, the video card has become unusable. If you don't have a built-in video card, you'll need a known good one to check your PC.
Nine short	Bios checksum error	If the problem occurs after BIOS updates, try rolling it back to old version. But it’s better to take the motherboard to a service center.
Ten short	Failed to write to CMOS	Take the motherboard to a specialized center.
Eleven short	Motherboard cache error	One of the rarest this moment errors, which occurs mainly on very old motherboards. In any case, you cannot do without checking at a service center.
Long + short	Power supply problem	If you have some knowledge in this area, check all the voltages in the power supply with a voltmeter. Then evaluate the condition of the capacitors inside the unit - perhaps some of them are swollen and need to be replaced. If you are not sure that you can handle it on your own, take the power supply unit for repair or replace it with a new one.
Long + two short	Video card malfunction or faulty RAM connectors	Replace the motherboard.
Long + three short	Video card malfunction or incorrect memory type installed	Try removing the video card and memory sticks one by one and starting the PC without them. If the loading went well, the culprit is obvious, but if not, take the motherboard to a service center.
Long + four short	No video card	Check the video card connectors. It may have malfunctioned.
Long + eight short	Video card failure/monitor not connected	Check the video card connectors, try reconnecting it to the motherboard, and the monitor to the system unit.
Three long	RAM check failed	Reconnect the RAM sticks or replace them with known good ones.
Five short + long	RAM is missing/installed incorrectly	Check your RAM sticks.
Continuous beeping	PC overheating/RAM or power supply failure	Check the serviceability of the power supply and the temperature of the motherboard components.

AWARD

Sequence of sounds	Decoding	User Actions
One short	POST completed without errors	Wait for the OS to load and get to work.
Two long	Minor problems during verification	The monitor will prompt you to resolve errors through the CMOS Setup Utility program.
Three long	Keyboard problems
Long + short	RAM problems
Long + two short	Video card malfunction	Remove the discrete graphics card and boot the PC with a built-in one. If the download went well, replace the discrete video card.
Long + three short	No video card/video memory problem	See previous paragraph.
Long + nine short	Error reading from ROM	Take the motherboard to a service center.
Constant short squeak	Problem with RAM or power supply	Check the RAM modules using the methods indicated above. Assess the voltage on the power supply using a voltmeter and check the internal condition. If you do not have the necessary knowledge, simply take the power supply to a specialized center.
Constant long squeak	RAM errors	Remove the memory sticks, clean the connector from dust, wipe the contacts with a soft eraser and try to insert them one by one.
Cyclically repeating short and long beeps	CPU problem	Check that the processor is connected correctly to the motherboard. Remove the cooler and the processor itself, thoroughly clean them of dust, check all pins and contacts. Change thermal paste if necessary. Reinstall the processor and check that it is connected correctly. If you recently purchased a new processor, make sure it is compatible with your motherboard.
Continuous beeping	Problems with power supply	If you have some knowledge in this area, check all the voltages in the power supply with a voltmeter. Then evaluate the condition of the capacitors inside the unit - perhaps some of them are swollen and need to be replaced. If you can’t handle it on your own, take the power supply unit for repair or replace it with a new one.

Phoenix

Sequence of sounds	Decoding	User Actions
1-1-2	Critical problems with the processor	Replace the processor with a known good one.
1-1-3	CMOS failure
1-1-4	BIOS checksum error	If the problem occurs after updating the Bios, try rolling it back to the old version. But it’s better to take the motherboard to a service center.
1-2-1 or constant long signals	Problems with the motherboard
1-2-2	DMA controller problems	See previous paragraph.
1-3-1	Failure in the RAM regeneration circuit	Take out the RAM, clean the connector from dust, wipe the contacts with a soft eraser and try to insert the strips one by one into place.
1-3-3	Error in the first 64 KB of RAM	Take out the RAM, clean it from dust, wipe the contacts with an eraser and put it back in place. Reset BIOS settings to default.
1-4-2	RAM initialization failed	Take out the RAM, clean the connector from dust, wipe the contacts with an eraser and try to insert the strips one by one into place.
1-4-3	System Timer Problems	Remove all the boards from the motherboard, leaving only the video card, and insert them back one by one, thus identifying the problematic one. Replace the Bios battery with a new one. Reset BIOS settings. Update the Bios (best at a specialized center).
1-4-4	I/O port error
3-1-1 or 3-1-2	DMA Channels Error	Check the motherboard at a specialized center.
3-2-4	Keyboard problems	Reconnect the device or connect a known working device to the PC. If this does not help, take the motherboard to a service center.
3-3-4 or siren sound	Problems with the video card	Remove the video card from the motherboard, clean it from dust, wipe the contacts with a soft eraser and return it to its place. Remove the discrete graphics card and boot the PC with the built-in one. If the download went well, replace the discrete video card.
3-4-1	Serious failure when accessing the monitor	Reconnect the monitor to the PC and reboot. If the error continues, either the monitor or the motherboard is faulty.
3-4-2	Problems with video card BIOS	Remove the video card from the motherboard, clean it from dust, wipe the contacts with a soft eraser and return it to its place. Remove the discrete graphics card and boot the PC with the built-in one.
4-2-2	No problems identified	Wait for the download to finish and continue working.
4-2-4	Critical CPU failure	The processor has become unusable - replace it.
4-3-2 or 4-3-3	First/second timer failure	Check the motherboard at a service center.
4-4-1	Serial port problems	Reconnect external equipment and restart your PC.
4-4-2	Parallel port problems	The algorithm of actions is the same as in the paragraph above.
4-4-3	Math coprocessor failure	Check the motherboard at a service center.

Not everyone will think about what they mean BIOS beeps when we press the PC power button. It is the BIOS that causes such sounds, which can be short or long. Different types BIOSes have different sound signals, in this article I will try to talk about them all, as well as solve some of the problems that accompany them.

Purpose of BIOS beeps

When you turn on your computer, you hear a squeaking sound. Usually it is short and comes out of the speaker located inside the system unit. Such a signal does not bode well and indicates that the program has successfully diagnosed the POST self-test, which is responsible for checking components for serviceability. If everything is fine, this will be the signal.

On some PC models, you may not hear anything at all, but this is only thanks to the manufacturer, who did not build a speaker into the computer. Unfortunately, the lack of a speaker is not good decision, since it will not be possible to determine a malfunction, for example, of a video card.

If some kind of malfunction occurs, you will hear a sound when you turn on the computer. There may be several of them, and they may be long, depending on what is faulty. Usually the instructions already contain all the necessary information about BIOS signals, but if you don’t already have this manual, then read this article and perhaps you will find a definition of certain BIOS signals.

Recommendation! If you decide to look inside the system unit, for example, to check the presence of a speaker, then be sure to turn off the power to the PC, and do not look immediately, but a few minutes after turning it off.

How can I find out who made the BIOS?

In this section, I will show you how to find out who made your motherboard BIOS firmware. You need to know this, because in different models, sound signals indicate different violations.

First option

The simplest thing you can do is turn on the PC and for a couple of seconds you will notice a window in which the BIOS manufacturer and some other parameters are already indicated. The most popular manufacturers are AMI And AWARD. There are, of course, others.

Second option

To do this, you need to find an item that shows information about the computer and the BIOS firmware itself. Usually the tab is called System Information.

Third option

Boot into Windows andOpen the window "Run" using keys Win+R. Enter the command there msinfo32. On the left you should be in the section "System Information". On the right we look at the point "BIOS version».

Fourth option

You can also use various utilities, for example, AIDA64 or CPU-Z. Free program CPU-Z has a tab "Pay", where you go. There is a subsection "BIOS" and all the necessary information about it.

Using the AIDA64 program, go to the section "Motherboard" on the left and click on the item there "BIOS", all information about Bios will be listed there.

How to decipher BIOS beeps?

So, we figured out the BIOS manufacturer, now I will show the designation of beeps, but only for a few versions.

BIOS AMI beeps

One of the most famous companies American Megatrends Inc. Abbreviated as AMI BIOS. In 2002 it was already such. So, the normal beep is a short sound. It means that everything is fine, after which the OS will begin loading. Now let's look at other sounds.

Signal	Designation
Long continuous	The power supply is faulty, the computer is overheating.
Two short	RAM parity error.
Three short	Error in the first 64 KB of RAM.
Four short
Five short
Six short	Error in the keyboard controller.
Seven short	Problems with system board.
Eight short	Problems with video card memory.
Nine short	BIOS checksum error.
Ten short	CMOS recording is not possible.
Eleven short	RAM error.
1 long and 1 short	There's something wrong with the power supply.
1 long and 2 short	Problems with RAM or video card.
1 long and 3 short	Problems with the video card or RAM.
1 long and 4 short	There is no video card in the slot.
1 long and 8 short	Lack of monitor connection, something with the video card.
Three long	The test completed with an error, problems with RAM.
5 short and 1 long	There is no RAM module.

Sometimes the sounds are false; if you turn off the PC again and then turn it on, there is a possibility that such a signal will no longer appear. If you hear more than one short sound, but ones like those shown in the table, then you need to solve the problem.

Sound signals AWARD

The next popular manufacturer is AWARD. Let's consider its sound signals. Then someday I’ll write about all the existing types of BIOS, and also recommend a book in which everything is described in great detail.

The normal sound signal, indicating the serviceability of all computer components, is still the same as in the first option - a short signal. The remaining sounds are listed in the table below.

Signal	Designation
Continuous signal	Power supply failure.
One short, repeats	There's something wrong with the power supply.
One long, repeating	Problems with RAM.
One long and one short	RAM malfunction.
One long and two short	Problems with the video card.
One long and three short	There's something wrong with the keyboard.
One long and nine short	Error reading data from ROM.
Two long	There are non-critical faults.
Three long

Phoenix beeps

In this type of BIOS, sounds are accompanied by pauses, that is, if 1 sound is heard, then there is a pause, then another sound, and another pause, and then two sounds, then the signal is recorded in the form of these very sequences of pauses and sounds - 1-1-2 . Now I will show this in the table.

Signal	Designation
1-1-2	Problems with the central processor.
1-1-3	CMOS recording is not possible. The CMOS battery is dead, which means it needs to be replaced. Problems with the system fee.
1-1-4	Invalid BIOS ROM checksum.
1-2-1	The programmable interrupt timer is faulty.
1-2-2	There is an error in the DMA controller.
1-2-3	There is an error in reading/writing the DMA controller.
1-3-1	Problems with memory regeneration.
1-3-2	The RAM test does not run.
1-3-3
1-3-4	The RAM controller is damaged.
1-4-1	IN address bar RAM problems.
1-4-2	RAM parity error.
3-2-4	There were problems initializing the keyboard.
3-3-1	The CMOS battery is dead.
3-3-4	Problems with the video card.
3-4-1	Problems with the video adapter.
4-2-1	Problems with the system timer.
4-2-2	Problems with CMOS completion.
4-2-3	Problems with the keyboard controller.
4-2-4	Error in operation central processor.
4-3-1	RAM testing failed.
4-3-3	Errors in the timer.
4-3-4	Problems with RTC operation.
4-4-1	Problems with the serial port.
4-4-2	Parallel port problems.
4-4-3	Problems with the coprocessor.

This is interesting:

The most common BIOS beeps

Of course, there are many more sound sequences for various types BIOS, and there would be much more tables here. Therefore, I decided to consider the most popular signals that most users encounter.

• 1 long and 2 short sounds– usually this signal indicates problems with the video card. Check whether the video card is inserted well into its slot, also do not forget that due to dust and dirt there may be problems with connecting devices, so it is better to clean everything. Take out the video cards, wipe the contact tracks with an eraser, and do it very carefully. Then put it back in. If the difficulty persists, then you can try inserting the video card into another slot or switching to the built-in one, provided that it is on the motherboard. We are talking about integrated.

• 1 long sound- indicates a problem with the RAM.

• 3 short sounds– Again errors in the random access memory device. There is the following option - remove the RAM modules and clean the contacts, as well as the slots from dust and dirt, swap them, replace them with other RAM modules. Alternatively, you can reset the BIOS.

• 5 short sounds– this signal indicates a processor malfunction. It is possible that you purchased a new processor that is not compatible with your motherboard. Also check all contacts and clean any dust.

• 4 long sounds– the signal indicates problems with the cooling system, that is, with coolers. Perhaps they are completely faulty or work slowly. There are two options: clean them from dust, or change them.

• 1 long + 2 short sounds– a malfunction of the video card or from the RAM connectors.

• 1 long + 3 short sounds– may also indicate problems with the video card and RAM, or something with the keyboard. We'll have to check everything.

• 2 short sounds– I can’t say for sure, check your documentation. There may be a problem with the RAM.

• Several short sounds– just count how many sounds and see if such a combination is in the table.

• No PC boot or BIOS sound– if there is no sound, then most likely you do not have a speaker, or it is faulty. If the computer does not boot, check the power supply.

Tips for troubleshooting problems with your computer emitting BIOS beeps

I almost never had any components fail, and sound signals appeared only due to poor contact of some components. For example, the RAM modules or video card were inserted poorly. Sometimes something just went wrong and simply restarting the computer helps. Sometimes it can help in solving problems altogether.

I want to say that people who do not know should not take any action. If you have friends who can help, then contact them, or go to the service.

1. Sometimes you can correct the situation like this: remove some component and wipe its contact from dust, and also blow out the connector. Then put everything back in. You can clean the contacts with alcohol and a dry cloth or an eraser.
2. Look at all the components and elements located inside the system unit. Is there a smell of burnt components, swollen capacitors, oxide and other bad phenomena?
3. Before you climb inside the system unit, disconnect it from the power supply, and also remove static electricity from yourself. You can simply touch the power supply itself with your hands.
4. Do not touch the board pins.
5. Never use metal tools to clean modules.
6. Assess the situation before starting work. Your computer is under warranty, but you don’t even have work experience? Then give it back under warranty, or ask a knowledgeable friend to help.

Please ask any questions in the comments. I hope this article helped you in solving your problems.

Almost every one of us, having started a computer or laptop, heard a beeping signal from its depths. If this does not happen, you need to check whether you have the appropriate speaker installed.

But sometimes, when the computer is faulty and preliminary testing carried out by the BIOS reveals errors, strange things come from the case. sound combinations, which will tell practically nothing to an ignorant person, but can tell specialists a lot about the causes of the breakdown and how to eliminate them.

When faced with a situation like this, the first thing you need to do is determine version and the manufacturer of the BIOS installed in the patient. This largely determines what exactly went wrong, and, consequently, further costs and actions.

All, regardless of manufacturer, communicate with the user using two types of sound signals: short squeak(KP) and long squeak(DP).

Ami Bios Error Signals

List of signals:

1	1 DP	All systems are operating normally.
2	1 CP	The RAM module is faulty or not compatible with the motherboard.
3	2 CP + 3 CP	In principle, they duplicate problem No. 2 and require the same solution algorithm.
4	4 CP	System timer errors. The cause is either errors in one of the expansion cards or a “dying” motherboard.
5	5 CP	The processor is faulty or unsuitable, expansion card errors.
6	6 CP	Most often it indicates a faulty keyboard.
7	7 CP	The interrupt controller did not work. The solution options are similar to point 4.
8	8 CP	The video card reported errors.
9	9 CP	The BIOS checksum returned an invalid value.
10	10 CP	CMOS memory returned a read-write error.
11	11 CP	An error occurred while testing the cache.
12	1 DP + 2 CP	Another option when testing a video card fails.
13	1 DP + 3 CP	RAM does not work.
14	1 DP+ 8 CP	There is a problem connecting the monitor, or a faulty video card.
15	2 DP + 2 CP	On modern computers an almost unheard of combination, because indicates problems with the floppy disk controller.
16	Additionally, it should be said about continuous beep, indicating overheating of the computer or a malfunction of the power supply and the absence of a signal when the monitor screen is blank, indicating a malfunction in the processor.

BIOS Errors

BIOS Award may beep the following reasons:

1	1 CP	Most often sounds from working computers and announces the absence of problems.
2	No signals continuous beeping or repeating CP- problems with nutrition.
3	1 DP	The error was returned by the RAM.
4	2 CP	Errors detected by preliminary testing are not critical. As a solution, you can try downloading the original BIOS settings or check the fastenings of the cables.
5	3 DP	Problems have been detected with the keyboard connection.
6	1 DP + 1 CP	The RAM is faulty, you can try swapping the strips, removing one of them, and cleaning the contacts with a regular eraser.
7	1 DP + 2 CP	This combination informs about a faulty video card.
8	1 DP + 3 CP	The keyboard may be faulty or unresponsive.
9	1 DP + 9 CP	There is something wrong in the BIOS itself, you can try to reset it by removing the battery or short-circuiting the corresponding jumper.
10	Frequently repeated short squeaks indicate problems with the power supply.
11	Long signals, repeated with the same frequency, indicate problems in the RAM.
12	Continuous signal- problems with nutrition.
13	Alternating high-low frequency signals indicate problems with the central processor.

Possible Phoenix BIOS problems

The next part will be useful for deciphering signals from the Phoenix BIOS language. Here I would like to note that he communicates with us only short signals, and when decoding you should pay attention to the combinations. Let's say combination 1C + 1C + 4C, should be read as Signal Gap Signal Gap 4x Signal. Let's get started.

1	1C + 1C + 3C	Error in reading or writing CMOS dynamic memory.
2	1C + 1C + 4C	The BIOS chip contains errors in the checksum.
3	1C + 2C + 1C	A problem has been detected with the motherboard.
4	1C + 2C + 2C, 3C + 1C + 1C, 3C + 1C + 2C	An error was returned from the DMA controller.
5	1C + 2C + 3C	DMA read-write test failed.
6	1C + 3C + 1C, 1C + 3C+ 3C, 1C + 3C + 4C, 1C + 4C + 2C, 4C + 3C + 1C	These combinations indicate problems with RAM.
7	1C + 4C + 1C, 3C + 1C + 4C	The computer reports problems with the motherboard.
8	1C + 4C + 3C, 4C + 2C + 1C	There is something wrong with the system timer.
9	1C + 4C + 4C	One of the I/O ports or the device connected to it is faulty. Try turning off everything unnecessary.
10	3C + 2C + 4C, 4C + 2C + 3C	Either the keyboard controller or the keyboard itself is faulty
11	3C + 3C + 4C	Video memory testing failed.
12	4C + 2C + 4C	The central processor may not be working. Occurs when working in protected mode.
13	4C + 3C + 4C	The real time clock is not working correctly.
14	4C + 4C + 1C, 4C + 4C + 2C	Parallel port testing completed with error.
15	4C + 4C + 3C	The math coprocessor is faulty.
16	Signals long, continuous They say there is a problem with the motherboard.
17	Sounds reminiscent siren howl, alternating frequency, indicates a breakdown in the video card.
18	If the CPU cooling fan is not connected, you will hear continuous signal.

Compaq BIOS Signals

As in most other cases, 1 CP When you turn on the computer, it says there are no errors.

1. 1 DP + 1 CP— occurs when there is a CMOS error, often indicating the need to replace the battery.
2. 2 CP- global error.
3. 1 DP + 2 CP— problems with the video card were detected.
4. 7 CP— if there is an AGP slot for connecting video cards, this indicates their malfunction.
5. 1 CP + 2 DP or Standing long signal indicates a problem in the RAM.

How Dell BIOS signals

Similar to the Phoenix BIOS, Dell BIOS you should pay attention not so much to the sequence of short and long signals, but to the quaternary combinations that are issued in the presence of errors.

• 1C + 2C- no video card.
• 1C + 2C + 2C + 3C- CMOS error.
• 1C +3C + 1C + 1C— DRAM update completed with an error.
• 1C + 3C + 1C + 3C— a fault has been detected in the keyboard.
• 1C + 3C + 3C + 1C, 1C + 3C + 4C + 1C, 1C + 3C + 4C + 3C, 1C + 4C + 1C + 1C— the appearance of any of these signal combinations indicates a malfunction of the RAM.

AST BIOS Alerts

What are the signals and what does the AST BIOS mean?

1	1 CP	This sound indicates a CPU failure.
2	2 CP or 3 CP	The BIOS has detected problems with the keyboard controller.
3	4 CP	Cannot communicate with the keyboard.
4	5 CP	Something is not working in the keyboard input.
5	6 CP	Problems with the motherboard.
6	9 CP	The CMOS checksum is incorrect, the BIOS chip may be damaged.
7	10 CP	There is a problem with the system timer.
8	11 CP	Chipset malfunction.
9	12 CP	The power management register returned an error.
10	1 DP + 1KP or 1 DP	The DMA controller is faulty.
11	1 DP + 2 CP, 1 DP + 3 CP, 1 DP + 4 CP	Any of these sound patterns indicates problems with the video adapter.
12	1 DP + 5 CP	Memory error.
13	1 DP + 6 CP	Memory vectors cannot be loaded into BIOS memory.
14	1 DP + 7 CP	Video equipment is not initialized.
15	1 DP + 8 CP	The video memory is faulty.

What does UEFI BIOS signal?

UEFI is updated version BIOS, which is used on newer motherboard models. UEFI also has a number of beeps. So how do you decipher them?

1
2	2 CP	There are non-critical errors. When loading, you are prompted to go into CMOS and manually correct them. You can try checking the cables.
3	3 DP	The keyboard controller generated an error
4	1 CP + 1 DP	RAM is faulty
5	1 DP + 2 CP	The video card signals an error
6	1 DP + 3 CP	Video memory error
7	1 DP + 9 CP	Error reading from ROM
8	Continuous short beeps They say there is a problem with the power supply or RAM.
9	Continuous long beeps	RAM problems
10	Alternating long And short signal	Processor failure
11	Continuous squeaking also indicates problems with the power supply

IBM BIOS problems

And lastly, IBM BIOS.

1. 1 CP— everything works as usual.
2. 2 CP— problems with the operation of video equipment, the monitor is not connected.
3. 3 DP— the keyboard controller does not work on the motherboard
4. 1 DP + 1 CP— testing revealed faults in the motherboard.
5. 1 DP + 2 CP— the Mono/CGA video system has failed.
6. 1 DP + 3 CP— EGA/VGA outputs are faulty.
7. Short squeak, constantly repeating indicates insufficient power or problems with the motherboard. Just like continuous sound.