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The processor beeps and does not turn on. Why is the system unit beeping? Causes and consequences. What to do if the computer turns on, but the operating system does not start

Welcome to another article! The computer beeps and does not turn on. Probably, this is the question that is common in various computer forums and in social networks. Of course, this is not just a squeak, but alarms that warn you that a software or hardware failure has occurred.

Computer wizards will be able to understand by ear what exactly is bothering your PC or laptop. But professionals will ask for money even for a consultation. Why do you need this, if after reading this article, you yourself will be able to determine where the malfunction appeared on the computer. The most important task is to determine which BIOS you have. I will describe each BIOS, and also use an example to analyze the solution to the problem that the computer signals.

Computer beeps and won't turn on

The signals differ on different BIOS versions, if some have a common basis, then others, with the same sound, say completely different things. So, on computers that are not more than 10 years old, the following BIOS versions are used:

---->>> AWARD BIOS.

---->>> AMI (American Megatrends) BIOS.

---->>> Phoenix BIOS.

I have already talked about these BIOSes in more detail in one of my previous articles. Be sure to check out this article:

Here you will find a general concept, definition, about what BIOS is in general.

This is how the AWARD BIOS looks like - you can easily determine which version you have from the screenshots from this article.

Many users consider the AWARD BIOS to be a simple version - here I agree with them, since you can work with it quickly and, most importantly, conveniently. Before studying the signals, let's deal with entering the BIOS, because we need to determine the version. The activator button for almost all computers (stationary and laptops) is the "Del" key. We turn on the computer and immediately begin to click on it - usually several clicks are required, since the signal may not reach in one touch.

In rare cases, an alternative button is used to enter the BIOS. For example, on netbooks, this could be one of the "F" command keys. In any case, the system prompts us at the first seconds of loading.

In this case, "Del" is used to enter the BIOS. Take a close look at the bottom of the screen when booting up to find out which button is used to log in on your computer if the standard "Delete" does not fit.

Come in? Great, now compare your BIOS with screenshots to see which section of my article will be useful to you.

AWARD BIOS - meaning of signals

In addition to the characteristic design, the name at the top of the screen speaks of belonging.

So, the computer beeps and does not turn on. I propose to consider the meaning of signals when loading the operating system:

Two short beeps - errors in this case are not critical, their causes are misplaced date and time parameters in the motherboard itself, as well as problem cables. The time is lost due to a dead battery in the board - in this case, the signal can be ignored. If the download does not continue, check if the cables of hard drives and other units are tightly connected.

1 short- you hear this signal every time the computer boots up. If he is alone, then everything is working properly, you can be calm.

3 long- this signal indicates that the keyboard is either defective or incorrectly connected. Check if the contacts are securely connected.

Repeated repetition of one short signal - the power supply is partially faulty. First of all, try to clean it, it may just be clogged with dust. If that doesn't help, take it in for repair.

1 long, then 1 short- the signal indicates a malfunction in the RAM modules. Remove them from the motherboard, and then carefully clean their contacts, fit them tightly into the sockets.

1 long, then 2 short- the problem is related to the video card. Take it out, carefully examine it visually, if the contacts are not swollen, then clean it and put it back. If you have a laptop / netbook with a built-in graphics module, then you should take your computer for repair.

1 long, then 3 short- again a keyboard malfunction, or rather, a lack of initialization. Perhaps the problem is in the device itself, but just in case, it's worth checking if the keyboard is firmly connected to the computer.

1 long, then 9 short- When booting the computer, a failure occurred in the ROM. Rebooting the PC or laptop can sometimes correct the situation; in other cases, you need to change the firmware of the computer's permanent memory chip.

AMI BIOS - signal meaning

This is how the menu in ATI BIOS looks like, at the bottom there is a name: American Megatrends.

List of signals:

1 short - all units and software are working properly.

2 short ones - an error in the initialization of RAM modules. Open the cover and see if they are clogged with dust, clean the contacts. If the problem is not solved, then you should go to the workshop.

3 short - the fault also affects the RAM. Here, too, it is necessary to check the contacts and the correct installation of the “rulers” of RAM.

4 short - the signal indicates that the system timer has gone astray. Most users ignore this defect, as it does not interfere with work.

5 short - malfunctions in the processor. You won’t be able to solve the problem on your own, so I recommend that you immediately go to a computer workshop or service center.

6 short ones - a defect in the operation of the keyboard (in rare cases, problems are associated with the mouse).

7 short - the signal indicates that the motherboard is malfunctioning. Without additional equipment, it will be problematic to determine what the defect is, the conclusion is system unit or a laptop for repair.

8 short ones - problems with graphics active adapters (in addition to the main video card, the motherboard has a built-in version).

9 short - a failure in the BIOS firmware. Sometimes the problem goes away after a reboot or after a Windows update.

10 short - the signal indicates an error in the CMOS memory.

11 short - if you counted exactly eleven signals, then the defect is in the cache. Need to clean it up.

1 long and 2, 3 or 8 short beeps inform the user that the video card is not connected to the computer correctly or is completely missing. I recommend that you check if the monitor plug is properly connected to the video card.

As you can see, in a more modern version of the BIOS, there are more signals, while they report a specific problem. AMI BIOS comes on modern computers, is currently considered the most stable version.

Phoenix BIOS - Meaning of Signals

"Phoenix" can be found on outdated machines, or rather, on motherboards. In any case, you can work with the Phoenix BIOS and, if you wish, even understand it, although it was difficult for me to perceive the signals of this version.

Here, the signals come in series, for example, “1 beep -1 beep - 3 beeps" means an error when recording or playing back CMOS information.

1 - 1 - 4: the data that is on the chip cannot be downloaded.

1 - 2 - 1: a fairly large range of errors in the operation of the motherboard. If the download does not continue, then you should immediately carry the computer to a service center.

1 - 2 - 2: The DMA controller is malfunctioning, sometimes cleaning the motherboard and reconnecting the plugs helps.

1 - 3 - 1: (3,4): error in RAM (random access memory).

1 - 4 - 1: This signal can indicate various problems related to the operation of the motherboard. The exact problem can only be determined at the service center.

4 - 2 - 3: incorrect or missing keyboard connection, check the contacts.

What to do if the computer beeps and does not turn on.

Usually, people only start noticing the beep when the computer stops booting. First of all, determine the signal, to help - the tables above for all BIOS versions.

There is a possibility that somewhere the socket has moved away from the hard drive or other aggregate part of the computer. Open the computer cover, then take a good look at all the "vital" elements on the motherboard. This is especially true of the hard drive, video card and RAM.

In general, for a better understanding of today's topic - The computer beeps and does not turn on, I recommend that you watch the following video:

If the problem is with the batteries, then you can try to replace it yourself. This is an ordinary battery, resembling a tablet in shape, which is located on the motherboard. It usually doesn't affect booting, it just tells you that the battery is low. If the download does not occur, while the signal indicates that the processor, RAM or other elements of the motherboard are malfunctioning, then you should immediately contact the professionals. Usually in such cases, the computer does not boot at all. Concluding today's article, I would like to recommend you to read the following article:

From this article you will learn what to do if the computer turns on, the fans are running, the lights are on on the system unit, but there is no image on the monitor, that is, in one word we can say that we see only a black screen on the monitor.

And that’s all for today, I hope the article was interesting for you. See you all in the next issue, dear friends!

Over time, any technique fails, and of course the computer is no exception. A user who has been working on a computer for more than a year knows that in the event of a hardware or software failure, the computer may refuse to work. For example, when the computer beeps and does not turn on, emitting incomprehensible signals for the user, before reaching Windows loading.

First, let's explain why the computer beeps when turned on. You must understand that the squeaks are emitted by the speaker, which is located in the system unit. And if you don’t know why the system unit beeps, then a little lower I will show a table by which you can see the reasons for this.

The computer can beep in different ways, emit one long beep, two short beeps, three short beeps, or even repeat short beeps 7 times in a row, etc. To determine what these signals mean, we will be helped by tables of sound signals for different types bios. Bios is located on the motherboard, which is located in the system unit.

When you turn on the computer, when a black screen appears, the equipment connected to the computer is checked. If all equipment is in working order and properly connected, then Windows boot. If your computer refuses to boot, then this article will help determine which computer hardware is out of order.

After you understand from the squeaks why the computer is beeping, you need to borrow this part from your friend and try to turn on your computer using the part from someone else's computer.

Let's repeat our steps if the computer does not start and beeps.

1. You need to turn on the computer and count how many squeaks the speaker emits.
2. See the version of your Bios when you boot your computer. Look for an inscription, Bios version or something like that. Usually the inscription is located at the very top.
3. Find the version of your BIOS and the number of signals in the table.
4. Next, find this part, connect it to the computer and turn it on. If the computer turns on, there are no squeaks, then you have solved the problem by almost 90 percent. It remains to find or buy a part in order to give the part to the person from whom you took it.

I think you understand, because it was stated as clearly as possible.

Note: signals are short, as well as long.

IBM BIOS

Number of beeps	Description
1 short
1 beep and blank screen	Faulty video system
2 short	Faulty video system (no monitor connected)
3 long	Faulty motherboard (keyboard controller error)
1 long, 1 short	Faulty motherboard
1 long, 2 short	Faulty video system (Mono/CGA)
1 long, 3 short	Faulty video system (EGA/VGA)
Repetitive short	Faults are related to the power supply or motherboard
Continuous	Problems with the power supply or motherboard
Missing	Faulty power supply, motherboard or speaker

Number of beeps	Description
1 short
2 short	Minor bugs found. A prompt appears on the monitor screen to enter the CMOS Setup Utility program and correct the situation. Check the tightness of the cable fastening. If you checked the cable and it didn’t help, then you need to replace it
3 long	Keyboard controller error
1 short, 1 long	RAM error
1 long, 2 short	Video card error
1 long, 3 short	Video memory error
1 long, 9 short	Error while reading from ROM
Repetitive short	Power supply problem. RAM problems
recurring long	RAM problems
Repetitive high-low frequency	CPU issues
Continuous	Power supply problem

AMI BIOS

Number of beeps	Description
1 short
1 long, 1 short	Problems with the power supply
1 long, 4 short	Lack of video card
2 short	RAM parity error or you forgot to turn off your scanner or printer
3 short	Error in the first 64 KB of RAM
4 short	System Scanner Malfunction
5 short	CPU issues
6 short	Keyboard controller initialization error
7 short	Motherboard problems
8 short	Video card memory error
9 short	BIOS checksum is incorrect
10 short	CMOS write error
11 short	Cache error located on the motherboard
1 long, 2 short	Video Card Error (Mono-CGA)
1 long, 3 short	Video card error (EGA-VGA)
1 long, 8 short	Problems with the video card or the monitor is not connected
Missing and blank screen	Processor defective. Perhaps the contact of the microcircuit is bent. If that doesn't help, replace the processor.
Continuous beep	Power supply failure or computer overheating

AST BIOS

Number of beeps	Description
1 short	Error while checking processor registers. Processor failure
2 short	Keyboard controller buffer error. Keyboard controller failure
3 short	Keyboard controller reset error. Malfunction of the keyboard controller or system board
4 short	Keyboard communication error
5 short	Keyboard input error
6 short	System board error
9 short	BIOS ROM checksum mismatch. Faulty BIOS ROM chip.
10 short	System timer error. The system timer chip is defective.
11 short	Chipset error.
12 short	Power management register error in NVRAM.
1 long	DMA controller 0 error. Faulty channel 0 DMA controller chip.
1 long, 1 short	DMA controller error 1. Faulty channel 1 DMA controller chip.
1 long, 2 short	Error damping the reverse motion of the vertical scan. The video adapter may be defective.
1 long, 3 short	Error in video memory. Faulty video adapter memory.
1 long, 4 short	Video adapter error. Faulty video adapter.
1 long, 5 short	Memory error 64K.
1 long, 6 short	Failed to load interrupt vectors. BIOS was unable to load interrupt vectors into memory
1 long, 7 short	Failed to initialize video hardware.
1 long, 8 short	Video memory error.

Pheonix BIOS

A hyphen (-) means a pause.

Number of beeps	Description
1-1-3	Error writing/reading data to/from CMOS memory.
1-1-4	An error was detected while calculating the checksum of the BIOS content.
1-2-1
1-2-2 or 1-2-3	DMA controller initialization error.
1-3-1	Error initializing the RAM regeneration scheme.
1-3-3 or 1-3-4	Error initializing the first 64 KB of RAM.
1-4-1	Motherboard initialization error.
1-4-2
1-4-3
1-4-4	Write/read error to/from one of the I/O ports.
2-1-1	An error was detected while reading/writing bit 0 (in hex) of the first 64 KB of RAM
2-1-2	An error was detected while reading/writing the 1st bit (in hexadecimal representation) of the first 64 KB of RAM
2-1-3	An error was detected while reading/writing the 2nd bit (in hexadecimal representation) of the first 64 KB of RAM
2-1-4	An error was detected while reading/writing the 3rd bit (hexadecimal) of the first 64 KB of RAM
2-2-1	An error was detected while reading/writing the 4th bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-2	An error was detected while reading/writing the 5th bit (hexadecimal) of the first 64 KB of RAM
2-2-3	An error was detected while reading/writing the 6th bit (in hexadecimal representation) of the first 64 KB of RAM
2-2-4	An error was detected while reading/writing the 7th bit (in hexadecimal representation) of the first 64 KB of RAM
2-3-1	An error was detected while reading/writing the 8th bit (hexadecimal) of the first 64 KB of RAM
2-3-2	An error was detected while reading/writing the 9th bit (in hexadecimal representation) of the first 64 KB of RAM
2-3-3	An error was detected while reading/writing the 10th bit (in hex) of the first 64 KB of RAM
2-3-4	An error was detected while reading/writing the 11th bit (hexadecimal) of the first 64 KB of RAM
2-4-1	An error was detected while reading/writing the 12th bit (hexadecimal) of the first 64 KB of RAM
2-4-2	An error was detected while reading/writing the 13th bit (hexadecimal) of the first 64 KB of RAM
2-4-3	An error was detected while reading/writing bit 14 (hexadecimal) of the first 64 KB of RAM
2-4-4	An error was detected while reading/writing the 15th bit (hexadecimal) of the first 64 KB of RAM
3-1-1	Error initializing the second DMA channel.
3-1-2 or 3-1-4	Error initializing the first DMA channel.
3-2-4
3-3-4	Video memory initialization error.
3-4-1	There were serious problems when trying to access the monitor.
3-4-2	Cannot initialize video card BIOS.
4-2-1	System timer initialization error.
4-2-2	Testing completed.
4-2-3	Keyboard controller initialization failed.
4-2-4	Critical error when the CPU enters protected mode.
4-3-1	Memory initialization error.
4-3-2	Error initializing the first timer.
4-3-3	Error initializing the second timer.
4-4-1	Error initializing one of the serial ports.
4-4-2	Parallel port initialization error.
4-4-3	Math coprocessor initialization error.
Long, incessant signals	The motherboard is faulty.
Siren sound from high to low frequency	The video card is faulty, check the electrolytic capacities for leakage or replace everything with new known good ones.
continuous signal	The CPU cooler is not connected (faulty).

Compaq BIOS

Number of beeps	Description
1 short
1 long + 1 short	CMOS BIOS memory checksum error. Possibly the ROM battery is dead.
2 short	global error.
1 long + 2 short	Video card initialization error. Check if the video card is installed correctly.
7 beeps (1 long, 1 s, 1?, 1 short, pause, 1 long, 1 short, 1 short)	AGP video card failure. Check if the installation is correct.
1 long standing	RAM error, try rebooting.
1 short + 2 long	RAM failure. Reboot via Reset.

Dell BIOS

A hyphen (-) means a pause.

Number of beeps	Description
1-2	Video card not connected
1-2-2-3	BIOS ROM checksum error
1-3-1-1	DRAM update error
1-3-1-3	Keyboard error
1-3-3-1	Faulty memory
1-3-4-1	RAM error on line xxx
1-3-4-3	RAM error on low bit xxx
1-4-1-1	RAM error on high bit xxx

If you have a printer, it is better to print this article, suddenly at the wrong time your computer will not turn on and at the same time emit signals. In one article, I already touched on the BIOS topic: "".

Immediately after the user presses the start button on the system unit, voltage is applied to the motherboard. That, in turn, distributes it to all nodes: processor, memory, bridges, etc. It then activates the basic input/output system, or BIOS. The BIOS polls all nodes for problems - is there a processor in the system, is memory installed, are hard drives detected. After the test, if everything is in order, the BIOS transfers control to the operating system. If not, it will alert you with a sound.

As a rule, in such situations, the PC does not start. In order to understand what the problem is, you will have to turn to the documentation and understand what the BIOS is signaling about.

Diagnostic methods if the computer or laptop does not turn on

The BIOS is designed in such a way that, if problems are detected, it will tell us where you can roughly look for trouble. For example, on many models, a double beep may indicate that the . That is, for almost all categories of faults there is a sound.

Also, many modern motherboards have a built-in LED indicator that will show the error in alphanumeric form. And this will already narrow the circle of troubleshooting.

What does the emitted squeak indicate if the computer does not boot when turned on

Different BIOS versions may use different combinations of sounds. Therefore, in order to determine what to do if the computer does not start, one must first understand the error beep code. Let's go through the main BIOS models and see how they react to problems.

BIOS Award

Award was one of the earliest companies to develop basic I/O systems for personal computers. It originates in the distant 1983. In 1998, Award merged with another well-known BIOS manufacturer - Phoenix.

Consider the most common malfunctions and their sound codes. By the way, unlike other BIOS models, there are not so many of them.

Sound	What's happening
1 short beep	This means that no faults were found. Actually, the system will continue to boot quietly further.
1 long beep	This signal indicates some problem with RAM. This may be a damaged or incorrectly installed module, as well as the inability to initialize it.
1 long, 2 short or 1 long and 3 short	Problems initializing the video card or video memory. In some cases, it may indicate a problem with the motherboard.
Continuous, incessant beeps	May indicate a malfunction of the memory or video card

BIOS AMI

BIOS from American Megatrends Inc. or AMI usually gives a more detailed description of the error using beeps. That is, they have a fairly large set of sounds.

Sound	What's happening
1 short	Everything is in order, all systems are in good condition.
3 short	Errors found in RAM.
5 short	Something is wrong with the processor.
7 short
8 short	Video memory problems.
1 long and 1 short	Power Supply.
1 long and 4 short	The video adapter cannot be found, or it is missing altogether.
5 short and 1 long	Incorrect installation of memory or its complete absence.
continuous signal	There may be memory, and a power supply, and even overheating.

BIOS Phoenix

Now Phoenix is ​​a joint venture with Award. And from 1979 to 1998. was engaged in solo production of BIOS. Phoenix has the most interesting signal system. Usually there are a number of signals with pauses.

For example, there may be two beeps, then a pause, then another one, then two more beeps in a row. Most often, such a sequence is denoted something like this: 2-1-2.

Sound	What's happening
1-1-2	Processor initialization failed. It is either defective or installed incorrectly.
1-2-1	Motherboard malfunctions.
1-4-2	RAM malfunctions.
3-3-4	Something with video memory.
4-2-2	Test passed.
Long beeps, incessant	Motherboard malfunctions.

It is worth noting that some computer and laptop manufacturers often use their own BIOS designs. To find out the meaning of their errors, you need to visit the official website and find the BIOS user manual.

How to deal with the problem if the cooling fan does not turn on

Coolers for cooling in the system can be installed from 2 to 8 or even more. The first and most important one is responsible for cooling the processor. If it does not start, then after a while. If it is connected correctly, then some BIOSes are able to detect problems with it, as well as its absence. In addition to checking the reliability of connecting the connectors on the motherboard, it is unlikely that you can fix anything with your own hands. If the PC turns on, but the cooler does not, then you will have to replace it with a new one.

Another cooler is installed on the power supply. Although the operation of the entire system does not really depend on it, constant overheating of the unit can disable it over time. You can try to replace the cooler in it yourself, choosing the right one. But in most cases, you will have to contact the service or buy a new one.

Additional coolers can also be installed in the case, which provide an influx of fresh air, that is, ventilation. Their failure is not so terrible, because the coolers can be easily removed, disconnected from the motherboard and replaced with new ones, since they are inexpensive. By the way, the PC will work quite well without them for some time before replacement.

What to do if the computer does not turn on

If the computer beeps when turned on and does not turn on or even does not beep, then there can be many reasons for this. After all, even in one sound code, only approximate trouble spots are encrypted. Consider a few typical problems, and what to do if the computer does not start.

Fault 1: oxidation of contacts on the video card or RAM

At startup, in this case, the speaker will have to squeak. From the BIOS side, it will look like there is no video card installed in the system or.

The easiest way to fix this is to turn off the PC, remove the memory module or card and go over the contacts with a simple stationery eraser. Then you need to brush off the remaining dirt and insert the modules back.

Fault 2: The motherboard does not work

This is one of the most complex and difficult to determine diagnoses. If the motherboard malfunctions, the speaker may squeak as if there is no memory or video card. In any case, the PC will not be able to start.

In order to find out exactly why the computer does not boot and whether the motherboard is to blame, you must first conduct a series of simple studies. First, you need to try to turn on the "mother" through another power supply. You can try to test the launch without modules - RAM, . If the signals change, then the test reaches them, and the problem, perhaps, is in the motherboard.

You can visually inspect the condition of the motherboard. Often the fault is swollen and failed capacitors on the motherboard, next to the processor. If you have good soldering skills, you can replace it yourself. If not, then it is better to contact the experts. Nothing else can be done with your own hands at home.

Trouble 3: PC won't start due to power supply problem

As a rule, if the matter is in the power supply, then the computer, in general, does not show signs of life. That is, the LEDs do not light up, the coolers do not spin up. Including the power supply itself. The simplest advice is to check the connection and the presence of voltage in the network. Then you have to look somewhere else for a known good unit and start from it. It is very difficult to fix something in the power supply on your own, therefore, either replacement or repair in a service center.

What to do if the computer turns on, but the operating system does not start

In such a situation, there can be a whole bunch of problems. If the computer turns on, but the OS does not boot, then first of all the BIOS will tell us why this happened. For example, the screen might display “No Bootable Device”, which means that no operating system files were found on the hard drive. That is, the disk is found, but it is impossible to boot from it.

This happens when there is a malfunction hard drive- bad sectors or physical damage. By the way, the inscription can be like this - “Missing Operating System”, which is similar to the one already presented. You need to try to boot from another disk or reinstall the system again with a full format of the media.

Also, it will not be possible to reach the start of the operating system if the BIOS is not loaded. This is usually characterized by a blinking cursor on a black background. If a laptop or computer beeps when turned on, and then the download does not go on, then this will help establish a diagnosis of at least signal codes. If everything happens without sound, then you can try resetting the BIOS.

The easiest way is to take the battery out for a few minutes. Volatile memory will be erased, and the BIOS will be as if from the factory. If you don’t feel like waiting, then there are always special jumpers on the motherboard, by closing which you can reset the BIOS forcibly.

This jumper is usually labeled Clear Cmos, ClRTC, Clear RTC, or CRTC. But, in general, it should be indicated on the element placement map in the motherboard manual.

How to fix the problem when the computer turns on and immediately turns off

Here you need to immediately make a reservation that the problem can occur either by itself or after user intervention, for example, cleaning or upgrading.

Problems occurred after assembling or cleaning the computer

What to do if the computer does not boot after cleaning or upgrading? In both cases, there was access to the inside of the case. This means that some important cable was disconnected, a memory bar or a video card was touched.

If the BIOS does not beep, and the computer's power supply is working, then most likely the power does not reach the motherboard. You need to check the cable that supplies the mother. Most often it has a 24-pin connector plus 4 more. You need to make sure that it is installed tightly and does not have burnt sides.

If there is power, then we find out what the BIOS determined using sound signals. And further according to the scheme. The most interesting thing here may be incorrectly installed, not by key. The consequences can be quite sad, as the processor is one of the most expensive parts of a PC, along with the graphics card.

If the problem occurs without penetrating the inside of the case

What to do if the computer does not turn on? Here again it is necessary to go sequentially. Check if there is power on the power supply. Does not start? So it's most likely him. We are looking for another power supply - we are trying to start from it.

Let's move on - do coolers start on the processor, system unit, motherboard (if any)? If not, check the power cables. Next, we listen to the “overflow” of signals from the BIOS. We find a combination and see what it is. If the RAM or video card - we try to pull it out, wipe it with an eraser and install it back. All other problems simply cannot be cured.

If the BIOS does not load at all, reset it as described above and try to start it again. Well, when everything has already been tried, and it remains only to sin on the operating system, then we reinstall it too. If you have interesting ways to deal with PC problems, you can share them in the comments.

Any technique, even the most advanced, can fail. Modern computers are equipped with devices that can inform about problems through special sound signals, as well as indicate the location of the breakdown. It is important to correctly evaluate the beep code, as it differs depending on the BIOS version and device manufacturer.

The sound that can be heard during various problems on the part of a personal computer or laptop comes from a small speaker located in the power supply housing. The presence of uncharacteristic audio signals always indicates failures at the technical or software levels.

Normally, we hear only one short sound, which indicates complete technical serviceability and successful startup of the system. The most common reasons include:

1. Dustiness of parts. As a result, the normal functioning of certain areas is disrupted due to a change in signal transmission or inefficiency of the cooling system. Causes up to 80-90% of all malfunctions, 70% of which are RAM modules. After removing excess dust particles, the computer returns to normal life.

   

2. Need to replace thermal paste. Normally, the heatsink should ensure the removal of heat from the processor, however, both elements do not have perfectly smooth surfaces. The problem is solved by adding a special mixture to this space. Over time, the structure of the paste begins to harden, and the thermal conductivity decreases. The processor can instantly overheat at system startup and shut down. The recommended frequency of changing the heat-conducting mixture is once every 6 months.

   

3. Parts malfunction. Most often, the video card, RAM and motherboard fail. Ascertaining the breakdown of the latter is possible only with full confidence in the serviceability of other parts of the computer. In this variant, it is important to “collect an anamnesis”: whether the modules have been replaced recently, whether there have been episodes of unreasonable freezing or shutdown, etc.

   

4. Problems with the power supply. A situation of nature for older computers (5-7 years or more), when it is not possible to provide adequate power supply to the video card or processor.

   

There are several simple ways to diagnose damage:

Procedure for identifying the cause

Diagnosis does not present significant difficulties. The following steps must be taken:

1. Find out the BIOS version.
2. Compare the frequency and duration of signals with the corresponding tables.
3. Determine the type of technical or software failure.
4. Try to solve the problem yourself. In the absence of success, you should contact a specialist.

BIOS Varieties

BIOS is a set of programs that are necessary for the operation and interaction of PC hardware and all connected peripheral devices.

To check the version, you can:

How to enter the BIOS

Usually one or two keys are pressed at the same time. The basic combinations from hardware software manufacturers are as follows.

Table with a list of possible BIOS entry options for different versions.

The order in which the BIOS starts up may differ for different manufacturers of personal computers and laptops. For clarity, the data are presented in the form of a table.

Table with a list of possible options for entering BIOS on devices from different manufacturers.

Company	Keys	Image
Acer	"F1" or "F2"
AST	"Ctr+Alt+Esc" or "Ctr+Alt+Del" ("Delete")
	"F1" or "F3"
	"F2"
	"Fn+F1" or "F2"
HP	"F1", "F2"
	"ECS", "F1"
Sony	"F2", "F3"
Tiger	"Delete"
	"F1" or "F2" or "Delete"
	"F10"

How to recognizeBIOS in appearance

If you succeed in launching the firmware collection, then you can distinguish between different types by design and the nature of the text display. Below are illustrations of the most common versions:

Decoding computer signals

After the software is determined, it is necessary to start decoding the messages. To do this, you should listen carefully - the signals can have different durations and quickly replace each other. These features will indicate the localization of the breakdown.

Award BIOS

Length and order of change of signals	Interpretation of the failure and possible causes for elimination
1 short	Testing of all systems has been successfully completed, the start of the operating system startup
Brief - 2 pcs.	You should check the pairing density of all devices (loops) and reset the BIOS settings
Long - 3 pcs.
1 short and 1 long	RAM error. It is necessary to check the density of contacts, to clean from dust particles. Most likely the item needs to be replaced.
	Failure to receive information from the video card or its absence. You should disconnect the contacts, wipe them from dust or replace the video card
	Video memory acquisition failed. You should disconnect the contacts, wipe them from dust or replace the video card
1 long and 9 short	Failed to read persistent replacement device. Need a replacement ROM or motherboard module
Brief, repetitive	Incorrect operation of the power supply. Requires cleaning from dust and processing of contacts. You can try to replace the power supply or RAM
Prolonged, repetitive	RAM playback failure. Needs to be cleaned of dust
Continuous repeating signal with constant frequency change (small-high)	Defect in the processor or its absence
continuous monotone	Power supply failure. Solution: dust cleaning or element replacement

Phoenix BIOS

Reference! In the table, sound codes are displayed in the format “one, two, three”, where the numerals mean the number of consecutive sounds, and the comma means a pause.

Sound code	Interpretation of the results and a solution to the problem
One, one, two	The processor is defective or incompatible with the motherboard. Module needs to be replaced
One, one, three	Error playing or writing CMOS data. Need to replace the BIOS battery or motherboard
One, one, four	BIOS startup checksum calculation failure. Need to replace the battery or motherboard module
One, two, one	Main board startup error. You need to restart the PC, disconnect any expansion cards, reset the BIOS to factory settings. Using the switches located on the main unit, you need to update the CMOS or, if possible, perform these actions through the BIOS
One, two, two or one, two, three	DMA controller failure. Requires rebooting the device and turning off add-on boards. You probably need a new motherboard
One, three, one	RAM playback error. Requires installation of a new RAM or motherboard block
One, three, three or one, three, four	The problem of recording and playback of the initial 64 KB RAM of the device. It is necessary to check the correct installation of the modules of the operational unit, clean the contacts or replace the RAM completely
One, four, one	Failed to start the main board. You should reboot the PC, reset the BIOS and clear the CMOS using the motherboard toggle switch. All other modules must be disconnected from the motherboard
One, four, two
One, four, three
One, four, four	Recording or playback error on any input or output port. Requires a power outage and disconnection of all peripheral devices from the system unit (monitor, printer, mouse, etc.)
Three, one, one	DMA channel #2 startup failure. Turn off the PC and all available expansion cards. Might need a new motherboard
Three, one, two or three, one, four	DMA channel #1 startup failure. Turn off the PC and all available expansion cards. Might need a new motherboard
Three, two, four	An error has occurred in the device that controls the keyboard. Need to reconnect or replace the input device
Three, three, four	Video card playback failure. You need to reconnect the video adapter cable or connect a new one instead of a known defective one. With an integrated adapter, the RAM module is checked: you need to remove it and wipe the contacts or connect a new one
Four, two, one	Error starting the system timer. It is recommended to disconnect the PC from the power supply and reset the CMOS using the toggle switch on the motherboard
Four, two, two	Testing of all systems and peripherals has been successfully completed. Everything is fine
Four, two, three	The problem is in the device that controls the keyboard. It is necessary to reconnect this technical device or connect a new one. The motherboard may have failed.
Four, two, four	Fatal failure when transforming the processor into protected mode. You need to reset the CMOS using the lever on the motherboard or replace the processor with a new one
Four, three, one	Problem starting RAM. It is necessary to check the correct installation of the blocks in the connectors
Four, four, two	Parallel port failed to start. It is recommended to de-energize the PC by acting on the levers of the motherboard to return the CMOS to the zero position. If the steps do not help, then you need to charge an additional fee with the required port
Four, four, three	Failed to start math processor. Turn off PC. If the error persists - critical damage to the main processor

Video - Computer failure. BIOS Signals

AMI BIOS

Type of sound information	Decoding and ways out of the situation
1 short	System test completed successfully
Brief - 2 pcs.	Error checking the correct operation of RAM. Turn off the PC, check the correct installation of the RAM modules by disconnecting and connecting the ports. Disable the "ECC" option in the BIOS menu.
Brief - 3 pcs.	Failed to play the initial 64 KB of device RAM. It is necessary to check the correct installation of the RAM modules, clean the contacts or replace the RAM module completely
Brief - 4 pcs.	Error starting the system timer. You should disconnect the computer from the network, reset the CMOS on the motherboard using a special toggle switch. You may need to replace the motherboard
Brief - 5 pcs.	Failed to start the main processor. You need to disconnect the computer from the power supply, reset the CMOS using the levers on the motherboard, or replace the processor with a new one
Brief - 6 pcs.	The problem is in the device that controls the keyboard. It is necessary to reconnect this technical device or connect a new one. The motherboard may have failed.
Brief - 7 pcs.	Base unit startup failed. It is necessary to reboot the electronic computing device, return to the BIOS factory settings and clear the CMOS using the motherboard levers. All unnecessary modules must be disconnected from the motherboard
Brief - 8 pcs.	Video card startup failure. You need to check the connection of the video card by reconnecting to the slot. With an integrated module, it is necessary to check the RAM block
Brief - 9 pcs.	BIOS battery needs to be replaced because there is a checksum calculation failure
Brief - 10 pcs.	The BIOS battery needs to be replaced because there is a CMOS data write or playback error.
Brief - 11 pcs.	Failed to start data cache drive. Cache memory is available in slots designed to complement the motherboard block. You need to disconnect the PC from the network and insert the elements in their places. If necessary, replace defective modules
1 long and 1 short	Power supply failure. Needs cleaning or replacement
1 long and 2 short	Failed to receive data from the video card. Requires cleaning from dust and reconnecting loops. If necessary, replace the module
1 long and 3 short	Video adapter failure. Requires cleaning from dust and reconnecting loops. If necessary, replace the module
1 long and 4 short	The video card is missing. You need to pull it out and insert it again, after making sure that this block is present
1 long and 8 short	No monitor connection or video card failure. It is required to check the correct connection of the above devices
Continuous - 3 pcs.	RAM read or write test completed with errors. The RAM is not installed or connected incorrectly. It is necessary to check the correct connection of the module
Monotonous continuous sound	Functional error of the power supply or overheating of the PC. Dust removal or thermal paste replacement needed

Compaq BIOS

Sound code	Interpretation of the results and options for solving the problem
Brief - 1 pc.	The system started successfully. Testing found no errors
Brief - 2 pcs.	Any system error. Full check required
1 long and 2 short	Failed to read video card. Requires cleaning from dust and reconnecting loops. If necessary, replace the module
Brief - 7 pcs.	Graphics card read failure (AGP). Requires cleaning from dust and reconnecting loops. If necessary, replace the module
1 monotone	Error playing or writing RAM. RAM is missing or connected incorrectly. Check if the module is connected correctly.
1 short and 2 long	Failed to receive data from RAM. You need to make sure that the blocks are installed in the appropriate ports, or replace the entire module

Video - Computer beeps when turned on. What's this?

Determining faults in other ways

If you have problems starting the computer, deciphering beeps, or reading the LED indications on the panel, you can resort to simple ways elimination:

Features of cleaning a PC from dust

There are 2 main options for cleaning dust from the system unit case:

• fast (without shooting and detailed processing of modules);
• painstaking (each element is cleaned and the thermal paste is replaced).

To work, you will need a Phillips and straight screwdrivers, ethanol, a brush or brush for cleaning and a vacuum cleaner.

On a note! For processing large parts, you can use a paint brush, small ones - a clerical brush.

At each stage, it is recommended to take photos, so that later you can easily install all the devices in their original positions. The location of the blocks differs for different manufacturers and models of devices, and therefore significant difficulties can arise.

Disassembly of the system unit

The PC is turned off from the power supply, all peripheral devices are disconnected. In 99% of cases, the cover is located on the side. The procedure is as follows:

Important! When performing a quick cleaning, it is enough to remove all visible dust. With deep - remove individual elements, the main of which is the cooling system (radiator and coolers).

How to remove the cooler

How to remove the radiator

There are 2 options for mounting the radiator - screw or castle.

If the paste in the gap between the processor and the cooling element has dried up, then the processor can also be removed due to hardening. In this case, you need to pry the line of contact with a ruler or rail and separate the parts.

Removing the processor

The processor is secured with a plastic retainer. The latches on the socket are released and the main element of the computer is removed without much effort. There are legs on the back of the block, they should not be damaged in any way.

Cleaning scheme

Step 1. With a dry brush and a vacuum cleaner, all visible dust is removed. Bringing the hose to the corner parts of the body, you need to carefully remove dust particles with a brush. When working, you need to be careful with all the protruding elements so as not to damage them.

Important! Never use a damp sponge or cloth. Such changes disable the working elements. When you turn on a computer that is not dry enough, a short circuit or a slowdown in the conduction of signals due to oxidation of the contacts may occur.

Step 2 Then the remaining thermal paste is removed from the processor with a paper towel soaked in an alcohol solution. If the paste is significantly petrified, the use of acetone is allowed. In the same way, traces of thermal paste are removed from the radiator.

Step 3 The fan is blown with air and wiped with a cloth soaked in an alcohol solution. You should be careful when working with the blades of the device, as they have the least strength.

Replacing thermal paste

Step 1. The parts of the processor that were covered with thermal paste are re-coated with it. The mass is applied evenly, the layer thickness should not exceed 0.5 mm.

Step 2 The paste is evenly distributed with a smear or a payment card. It is very important to lubricate the entire external area of ​​the processor that touches the heatsink. Excess from the edges is removed with cotton balls or paper napkins.

Reassembly

Step 1. The processor is installed in such a way that the gold fixing corner coincides with the same in the socket. Then the radiator is brought under special hooks or scopes and pressed with a handle. It should fit well, not play.

Step 2 Coolers are screwed to their original positions. A check is being made. The blades, when properly installed, do not emit otherworldly sounds. The last step is to attach the system unit housing cover.

Conclusion

Thus, it is possible to easily find out the cause of the breakdown by decoding the sound signals emitted by the computer. However, the help of a specialist may not be required, as there are options for fixing problems on your own, the main thing is to carefully handle all the elements so as not to damage them.

Video - Computer beeps and does not turn on

Any technique breaks down, but with a computer it happens more often. Many users have encountered a situation in which the computer beeps and does not turn on. Questions immediately arise: what happened and how to fix it? We'll talk about this.

What can squeak inside?

The squeak of the computer comes from the speaker, and its main purpose is to squeak. It informs the user about any hardware or software error of the system (most often hardware). After removing the case cover, you can see a small round black speaker, which is usually fixed on the case itself. It is this speaker that emits a squeak, informing the user about possible software or hardware errors.

Why does my computer beep and won't turn on?

If everything is in order with the computer, then when you turn it on, you can hear only one weak squeak, which indicates that everything is in order with the system. However, there will be much more such squeaks in the event of a system malfunction. It is good when symbols or words are displayed on the screen, by which you can understand the problem and determine the nature of the malfunction. In the worst case, the monitor blinks and a characteristic squeak is always present. With its help, the system tries to explain to us at what level the failure occurs.

Procedure

So, you are faced with a situation where the computer beeps and does not turn on. What to do in this case? The procedure is as follows:

1. Find out the BIOS version of your computer.
2. Calculate exactly how many squeaks the speaker emits.
3. Find on the Internet (from a phone, for example) a table of faults in your BIOS and check against it, which means a certain number of squeaks.
4. Troubleshoot.

How to find the BIOS version?

To determine the malfunction, it is imperative to check the BIOS version. There are several ways to do this. The easiest is to open the instruction manual for the motherboard, but if it is not there, then you can simply remove the case cover and find it on the BIOS. The version will be listed there.

If, when you turn on the computer, you can see any inscriptions on the screen for three to four seconds, then you can also notice the BIOS version there. You can also go to the settings by pressing the Delete button when the system boots.

The most popular versions are the following: Phoenix, Award, AMI, but there are others.

AWARD Signals

So, if the computer beeps with short beeps and does not turn on, and we already know the BIOS version, then it is easy to find out the cause of the problem. The BIOS AWARD is characterized by the following signals.

Single short beep	No problems at work
Two short	Loading errors occur. Possibly the straps are loose. These are minor errors that can be eliminated even programmatically. Don't worry
Three long beeps	There are any malfunctions in the keyboard controller
Two signals of different length	RAM problem. At a minimum, you can pull out the RAM sticks, wipe their contacts with alcohol and put them back in place. If the signals have not disappeared, then it is worth trying to replace both or one of the bars and try to boot the system again. This way you can identify a faulty RAM module and replace it
One long beep, two short beeps	Possible damage to the graphics adapter. You should unplug the system unit from the outlet, pull out the video card, clean the contacts and plug it back in. If the signals remain, then the component will have to be carried for repair or returned under warranty to the seller
long, three short	Video card failure
One long beep, nine short beeps	ROM reading problem
Short recurring	The problem with PB
recurring long	RAM problem
Repeating signal with variable frequencies (high and low)	CPU problem
Continuous beep	Power supply failure. You can try to clean it of dust, but if the squeak remains, then it will have to be carried in for repair or replaced completely.

The table lists the main signals that occur when using motherboards with an AWARD BIOS version.

AMI signals

If it does not turn on with the AMI BIOS version, then the nature of the malfunction can be judged by the following signals.

1 short
2 long, 1 short	Faulty PSU
2 short	Possible problems with the RAM bar
3 short	Another memory problem. Any of its components are not working properly. At a minimum, you can take out the RAM sticks again, wipe their contacts with alcohol (degrease) and put them back. If there are several slats, then you need to try to turn on the computer by installing first one slat, and then the other. This will identify the faulty module.
4 short	The timer in the system is not working properly.
5 short	Processor problem. There is nothing to be done here. I need to take my computer in for repair. You may need to replace the CPU
6 short	Problem in the controller
7 short beeps	Breakage in the motherboard
8 short	video memory problem
9 short	Fault in BIOS firmware
10 short	Unable to read CMOS memory. It may not work correctly
11 short	The problem with the cache memory that is on the motherboard
Long, 2 short	Mono-CGA video system failure
Long, 3 short	EGA-VGA video system failure
Long, 8 short	Monitor connector loose or burnt out
Continuous beep	Power supply failure

In some cases, there are no sounds at all, and when you turn on the computer, there is a black screen. What to do in this case? It is worth checking the CPU. There is a possibility that one contact on the chip was bent. In this case, CPU replacement is indicated.

Phoenix Signals

Usually, if beeps come out, but the computer does not turn on, the reasons are typical for motherboards with. Only here the signals are a little atypical, so they need to be disassembled using signal codes. For example, the signal 1-1-2 will mean the following: signal - pause - signal - pause - two signals.

	Problem with CMOS memory
	Wrong BIOS checksum. Most likely, you will need to update the firmware of this chip
	Serious damage to the motherboard. You can’t do anything on your own here, you have to carry it in for repair or replace
	Problem with DMA controller
	RAM malfunction
	Another RAM error. In particular, this code indicates that the first 64 KB of RAM could not be read. It is necessary to remove the strips gradually and try to turn on the computer
	Error while preparing to launch the motherboard. Most often, the board needs to be replaced.
	RAM problem again
	The system timer is not working properly. Most often, the problem is solved in the workshop, but the board may also need to be replaced.
	Malfunction on input/output ports. External devices may not work properly
	Error while detecting DMA channels
	Video memory failure
	Unable to determine keyboard controller
	Inability to determine the BIOS of the video card
	The processor is not functioning properly. You may need to replace the CPU
	Can't determine math processor
	Improper functioning of RAM sticks
	Keyboard controller not working properly
	Incorrect operation of the first and second timers
	Can't determine serial port
Long beeps don't stop	Mother's, most likely, burned down
High to low frequency sound	Possibly on the video card. They need to be checked and replaced.
Computer keeps beeping and won't turn on	Speaks of a malfunction of the processor cooler. It is advisable to look inside the system unit and see if the cooler rotates

Now it is clear that if the computer beeps when turned on and does not turn on, then the problem may be hiding in any of the places listed above.

Other BIOS systems

The above are signal codes for only three BIOS systems, although there are more. In any case, you can find these codes specifically for your motherboard in the instruction manual. Check her out. However, there are ways to determine the problem without resorting to the BIOS.

Troubleshooting in other ways

If the computer does not turn on, the light blinks and there is a characteristic squeak, then this does not mean that a serious breakdown has occurred with the computer. First of all, you need to try to resort to simple troubleshooting methods:

1. You need to check if external devices are connected to the computer correctly: printer, webcam, mouse, etc.
2. Turn off the power and tighten all the connectors inside the system unit. It may turn out that some power connector is loosely attached to the component. As a result, the system thinks that the video card, for example, is missing and therefore the user sees a black screen when the computer is turned on. What to do in this case? Just push the connector harder.
3. Clean the motherboard from dust. In no case should you do this with a damp and even more so wet rag.
4. Examine the motherboard and look for swollen capacitors. If there is one, then it must be replaced (soldered and soldered the same).
5. Check the board for burnout.
6. You can also try removing all the components and reinstalling them.

For some users whose computer does not turn on, the reasons generally remain unknown. Even experts can not determine the malfunction. In this case, you just have to change the board. There are no specific statistics that would make it possible to understand which particular module fails most often. Each case is individual, so in the event of a breakdown, most likely, you will have to pay a fee for repairs.

Will it just go away?

In extremely rare cases, users have a problem that solves itself, and after a certain amount of downtime, the computer starts working normally. This can happen if there was insufficient voltage in the network, due to which the power supply unit could not provide all components with sufficient power. This happens very rarely, but such an option cannot be ruled out either. However, do not hope that the computer will stand and turn on without problems after a while.

Conclusion

So, we found out why the computer beeps and does not turn on. Unfortunately, if this happens, then it is extremely rare to solve the problem on your own. The motherboard and computer components in general are rather complex devices, therefore, in case of a breakdown, it is advisable to seek professional help. This will save a lot of time, and sometimes money, because in the process of self-repair, users often exacerbate the situation due to their technical illiteracy.