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The computer beeps 4 times and does not turn on. The computer beeps and does not turn on - the reasons and what to do? Where and how to connect the speaker on the motherboard

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 problem with RAM. 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 BIOSes

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 flashes and there is a characteristic squeak, then this does not mean that a serious breakdown has occurred with the computer. First of all, you should try to simple ways Troubleshooting:

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 quite 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.

Every time the computer boots up, system unit publishes squeak. Not everyone knows that this is a signal showing performance system block. And the decoding of these signals from " sistemnik"Only a few know.

That's what we'll talk about. If you are reading this material, I recommend printing it now. When decryption is needed, it will not work to get out on the Internet. :)

So what about squeaks "sistemnik". These signals are the result of testing the computer hardware (there is a cooler, RAM, vidyuha, etc.). Every time you boot the computer, it tests the hardware, and reports the results with this squeak. Decryption squeaks system block below.

• One short beep.
  Decryption:
  Everything is fine. Test passed successfully. You can continue to work. It happens that some system blocks not at all at this point squeak.
• There is no squeak, no image on the computer screen.
  Decryption:
  Malfunctions in the power supply, or processor.
  Correction:
  First, check to see if the power cord is plugged into an outlet. If everything is in order, try connecting a known working device to the power filter (such a cord with a box in which there are many sockets, there is also a switch button, usually red). A phone charger is suitable, of course, with a phone connected to it. You need to check all the outlets of the power filter. If the outlet is working, the phone will charge. Next, we check if the power supply starts up when the computer start button is pressed. In this case, the cooler (fan) of the power supply should at least twitch. If there is movement - look for a new processor, otherwise - a new power supply. You also need to check the motherboard power cable. It may happen that he moved away.
• One long continuous beep.
  Decryption:
  Power supply defective.
  Correction:
  Purchasing a new power supply.
• Two short beeps.
  Decryption:
  Minor bugs in BIOS settings.
  Correction:
  Go into the BIOS and set the optimal parameters. Exit to the BIOS is usually done with the key. If you don't know what to change, then set the default values. To do this, press the button. To exit and save - , . Some versions of the BIOS themselves prompt conflicting settings items with backlighting. Also, you can reset the BIOS settings by removing the motherboard battery for a few seconds.
• Three long peeps.
  Decryption:
  The keyboard is missing.
  Correction:
  Plug the keyboard into the PS/2 socket. If this does not help, you will have to change the keyboard.
• Three short beeps.
  Decryption:
  RAM error.
  Correction:
  To do this, you need to check if there are memory strips on the motherboard. Don't laugh, it happens. Then you need to take out all the memory sticks, carefully sweep away the accumulated dust, and stick the memory stick in turn, and start the system unit. If on some plank " sistemnik" squeaks, this may mean that the bar is faulty.
• One long and one short beep.
  Decryption:
  RAM is not working properly.
  Correction:
  It is possible that one or more memory sticks are conflicting with each other. You need to alternately stick one stick of memory and try to start the computer.
• One long and two short beeps.
  Decryption:
  The video adapter is not working properly.
  Correction:
  Fix settings in BIOS.
• One long and three short beeps.
  Decryption:
  The video adapter does not work.
  Correction:
  Check the performance of the video card. To do this, you need another, obviously working video card. You can also try to remove the card, remove dust from the slot, and stick the card in place. And do not forget to check if the card has additional power plugs. Power to such video cards must be given by a separate cord to which no device is connected. I also suggest checking if the monitor is connected and working. Try blowing out the plug connecting the monitor to the computer.
• One long and eight short beeps.
  Decryption:
  The video adapter is not working or the monitor is not connected.
  Correction:
  Same as written above.
• One long and nine short beeps.
  Decryption:
  Error reading BIOS data.
  Correction:
  Try resetting the BIOS settings by removing the battery. If that doesn't help, then flashing the BIOS. But that's another story, requiring a separate article. I will try to write it as soon as possible.
• Four short beeps.
  Decryption:
  The system timer does not work.
  Correction:
  You can try resetting the BIOS. But, unfortunately, it rarely helps. There is only one way out - to change or repair the motherboard.
• Five short beeps.
  Decryption:
  The processor is not working properly.
  Correction:
  Try to clean the dust from the processor slot, make sure the heatsink is clean and the processor temperature is low.
• Six short beeps.
  Decryption:
  Keyboard defective.
• Seven short beeps.
  Decryption:
  Motherboard malfunctions.
  Correction:
  Send the motherboard in for repair, or purchase a new one.
• Eight short beeps.
  Decryption:
  Faults in the video memory.
  Correction:
  Take the video adapter in for repair, or purchase a new one.
• Nine short beeps.
  Decryption:
  Incorrect BIOS checksum.
  Correction:
  Usually it is proposed to reset the BIOS settings and allows you to work further. In which case, you can reset the BIOS by removing the battery.
• Ten short beeps.
  Decryption:
  Error writing data to the CMOS chip.
  Correction:
  This error can occur when flashing the BIOS. Therefore, we will describe this part in another article.
• Eleven short beeps.
  Decryption:
  The cache is not working properly.
  Correction:
  Reset BIOS. If this does not help, we carry the computer for repair, or install a new processor.
• Repetitive long squeaks.
  Decryption:
  Faulty or incorrectly connected RAM.
  Correction:
  Reconnection of memory sticks. Calculation of the faulty, by connecting in turn and starting the computer. Dust cleaning.
• Repetitive short beeps.
  Decryption:
  The power supply is not working properly.
  Correction:
  Checking the performance of the power supply, checking the cords for breakage, checking the surge protector, and, last but not least, replacing the power supply.

That's all. There will be questions - ask.

PS: To reset the BIOS, instead of removing the battery, you can use a special jumper - a jumper. Its location can be found in the motherboard documentation.

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Almost every family has a computer or laptop at home. Very often there are problems associated with the operation of the operating system.

What to do if you turn on your computer while waiting for your favorite things to do on the Internet, but instead the screen goes dark and emits incomprehensible squeaks. Of course, this is scary, but first you need to calm down and figure out why this happened.

Operating system terms and concepts

In order to understand why we hear a terrible sound when we turn on the computer, we need to know three terms and concepts in order to start troubleshooting.

1. BIOS (BIOS) - responsible for input and output in the base system
2. PC speaker - outputs sound to the PC.
3. POST - when the PC is turned on, testing takes place inside the device.

When we press the power button, the computer starts preparing to work with windows, namely, BIOS-based self-testing starts. The performance of the hardware data is checked.

If everything is fine, then operating system loads smoothly. In the event of an unexpected failure, the data download is terminated and running program self-test gives a signal that we hear in the form of a sound.

Problems when squeaking on turning on the computer

A system failure can be caused by a dead battery, which is supported by the BIOS settings, or the clock is incorrectly set. You forgot to connect a keyboard or mouse, or your computer does not have a floppy drive. Sometimes a RAM read or write error occurs, and the cause of the squeak may be an incorrect CMOS checksum or there is a problem with the video adapter.

The reasons may be different, but there are tables that can solve the problem outlined above.

If you were still able to count the number of signals and found a connection with the keyboard controller, then you need to check its connection and serviceability. If the beeping is coming from a floppy drive (some older motherboards don't have them), be sure to plug it in. You can find an option in the BIOS to disable signals about the absence of FDD.

Is it a battery issue on a computer or laptop? You need to reset the old BIOS settings or replace the battery, which is done about once every three years. If resetting the settings or replacing the battery did not save you from this problem, then turn off the PC and remove the charge for a while. And if this did not help, then the last option would be to turn off the PC and reset the settings using the jumper - the jumpers located on the motherboard.

If there are problems with the video card, then you need to check the monitor and its connection. See if the video card fits well in the motherboard. To check the problem of the video card, you can insert a new or different one.

If the problem arose in RAM, then you need to remove it from a certain slot and process the contacts well (oxidation is possible) or change<<оперативку>>.

When the computer turns on and does not make sounds, and no image appears on the screen, you should reset the BIOS settings and carefully fix all connected wires.

All the operations performed with the computer did not help? You need to contact the experts. Their service has all kinds of equipment to repair the computer and solve any problem.

Basic System BIOS

Signals - squeaks are continuous short or long.

BIOS software varies from manufacturer to manufacturer. The correspondence of all signals and any faults that exist in the system will also be different.

The following information will be provided by which it will be possible to find a solution to the squeaking problem. To use this data, you first need to establish what type of BIOS your operating system belongs to. To determine the BIOS version, you need to look at the screen at the time when the boot starts and the system goes through the POST procedure, you can also do this using special utilities.

Decryption of squeaks when turning on the PC

The reasons may be different, but there is information that will help solve the problem outlined above.

The BIOS input and output base is divided into subspecies:

1. Award BIOS
2. AMI BIOS
3. Insyde H2O

Each of these versions has its own values.

Award BIOS

We will write in abbreviated form: 1 Cor. – 1 short beep, 1 long. - long

signal, 3 cor. - 1 dl. - 3 short signals and 1 subline.

• 1 box - Everything is okay;
• 2 cor.- a small mistake. Check cables and all BIOS settings;
• 3 dl. - There is a problem in the keyboard controller;
• 1 dl. Signal with the computer turned off - BIOS protection is activated;
• 1 box - 1 dl. - A RAM error has occurred;
• 2 cor. - 1 dl. – Video card with problems;
• 3 cor. -1 dl. - Problems with connecting the keyboard;
• 9 cor. - 1 dl. – Error in reading PES;
• Frequently repeated short sounds - inspect the power supply or RAM;
• Long and repeated many times - problems in RAM;
• Frequently repeated high and low frequency sounds - problems have arisen in the processor;
• The signal is not interrupted - indicates a problem in the power supply.

AMI BIOS

• 1 short signal - everything is in order;
• 2 cor. - Errors when reading RAM, as well as the printer and scanner are turned off;
• 3 cor. – error in the first RAM segment (64 kb);
• 4 cor. – possible problems with the timer in the system;
• 5 cor. -Need to pay attention to the CPU;
• 6 cor. - it's in the keyboard;
• 7 cor. – motherboard with problems;
• 8 cor. - an error in the adapter's memory;
• 9 cor. - incorrect BIOS checksum;
• 10 box – erroneous CMOS entry;
• 11 cor. - check the cache in the motherboard;
• 1 box and 1 dl. - View the power supply;
• 1 box and 3 dl. - Problems with VGA-EGA video card;
• 1 box 4 dl. – Video card is missing;
• 1 box 8 dl. - You need to connect a monitor or check the video card;
• 3 dl. – Problems with RAM;
• If there are no signals at all, then you need to watch the central processor;
• The signal is not interrupted - CPU overheating, and also check the power supply.

Need to remember about mobile computer, because many of them work on the BIOS system.

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

Once defined software, you need to start deciphering 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 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 troubleshooting methods:

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 handle all the elements carefully so as not to damage them.

Video - Computer beeps and does not turn on

If the computer does not turn on or the OS does not boot, there are several reasons for this.

Conditionally divided into:

• software (error initializing the operating system);
• hardware (breakdown of a certain device).

It is easy to deal with software on your own without resorting to the help of specialists, while technical difficulties arise. The main task to be solved in such a situation is to identify the cause of the problem.

Perhaps the power button is stuck, the power button is out of order, or the wires coming from it have moved away from the contacts on the motherboard.

To check, we disconnect the wire with the inscription “Power SW” from the motherboard and close the contacts in this place with tweezers (imitation of pressing a button).

We check the power supply - turn off the PC from the outlet, disconnect the wide 20/24 pin connector from the motherboard, connect it back to the mains and close the 4 and 5 pins with a clip.

If the PSU is working, in it (if you have a multimeter, measure the voltage at the outputs by comparing with the screenshots).

Computer turns on but no picture

If, when you press the power button, you hear the characteristic sound of the coolers, but there is no image on the screen, the problem is as follows:

• faulty video card;
• CPU;
• monitor.

First, make sure the display is in good condition.

To do this, we check whether power is supplied to it. If yes, go to the monitor menu (“Menu” button). When clicked, a selection dialog appears? So the problem is in the system unit.

The next step is to check the correct operation of the video card (see). If an additional video chip is integrated into the motherboard, temporarily connect a monitor to it. Still no images? So the chipset is faulty. Otherwise, the graphics adapter.

Reset CMOS as a mandatory step, a common reason after updating the hardware in the BIOS is information about the previous device, which is no longer there, or a failure has occurred and initialization does not occur. Turn off the power to the PC (unplug the power cord from the outlet), hold down the ON button on the case (required to remove residual voltage in the capacitors).

We take out the battery from the motherboard, if there is a jumper (jumper) with the inscription “CLEAR CMOS” we move it to the reset position (do not forget to return it to its original state, otherwise the PC will not start, or it will restart cyclically.)

If the computer does not turn on, but a black screen is shown, you can identify the cause of the breakdown by initializing the Post codes. The motherboard before loading the system analyzes the technical components. If at least one of them is faulty, a corresponding sound signal is given. The successful passing of the test is signaled by one short "peep" of the internal speaker (speaker).

If the computer does not turn on, but the coolers work, it may be system unit there is not enough power supplied by the power supply (a possible reason for this is dried or swollen capacitors).

If possible, temporarily install a non-productive video card, disable additional devices (hard drives, DVD drives, expansion cards, coolers, except those installed on the processor). Did the launch go? So you need to put a more efficient power supply.

Computer beeps and won't turn on

We determine the name of the BIOS developer company (see) of the motherboard (from the technical documentation).

In AMI, 5 short beeps means a problem with socket initialization, the malfunction lies in the processor.

Whereas in Phoenix - a breakdown of the hard drive (or the SMD component that supplies power to it).

8 short (or 1 long and 3 short) in AMI - a problem with turning on the video card. In Award, a similar error is indicated by 1 long and 2 short beeps, in Phoenix - 3, 4.1 short "beeps" with a break of 2 seconds.

Two short beeps on motherboards (except for outdated Asus) inform about a problem with RAM (the image appears, at least - the manufacturer's logo).

Lack of signals indicates power problems or a processor (perhaps they changed the thermal paste, and bent the petal on the pad).

If the computer beeps and does not turn on, troubleshooting in service centers is performed by a test POST card (connected to the PCI bus).

What each of the codes means is indicated in the technical instructions. The cost of the device starts from 300-500 rubles.

Computer shuts down abruptly on boot

What to do if the computer turns on and off in just a few seconds? The problem lies in a faulty power supply (it may simply not have enough power after a system upgrade, as mentioned above, the jumper was not returned to its place after resetting the CMOS) or missing cooling (if the processor, video card or any of the bridges overheats, the system automatically turns off the power to protect the components from damage).

We check if the cooler with the radiator is installed correctly. Next - we clean from dust, replace (if necessary) thermal paste. If this does not help, we put a known working power supply. Has there been any change? The motherboard is faulty and only a service center will help.

If the computer itself restarts during operation, this indicates problems with the cooling of the processor (see) or video card. Sometimes - in damaged sensors that are responsible for taking temperature readings.