There is no sound signal when turning on the computer: possible reasons, expert advice. Sound signals from the computer or what the BIOS beeps about. The BIOS does not give any signals.

Good day... Every time you turn it on again personal computer, starts automatic program self-test diagnostics POST (Power-On-Self-Test). Which is “written” in the BIOS ROM.In this short post I would like to give some examples of PC signal decoding tables. That is, the sound signals of the computer or what the BIOS beeps about.

To begin with, in order to use these tables, you will need to find out the BIOS manufacturer of your motherboard. It is quite easy to find out the BIOS manufacturer. You need to go into the BIOS itself (described below) and find the manufacturer’s signature.

A few words about the POST diagnostic program. This program checks all the most important components of a personal computer. Such as: processor performance monitoring, CMOS. Supporting motherboard chips and of course performs a quick test random access memory. The computer provides all this information about the performance of the PC to the micro-speaker in the form of a BIOS sound signal (beep).

If the POST program has successfully completed diagnostics of the critical components of the computer and if the PC is operating in excellent condition, then you should hear one short beep. After which the download will begin immediately operating system. If, when starting the computer, an inoperative component is detected, the POST program will immediately produce a certain sound signal (several short or several long beeps). Thus, it determines the detected error. Accordingly, the computer stops working.

How to enter BIOS Windows 7

In order to enter the BIOS with Winows 7 or XP, you need to press a certain key, or set of keys, immediately after turning on the PC. Accordingly, before loading the computer operating system itself.As soon as you press the computer restart button, you immediately need to press a certain key. Or a set of keys. It is advisable to click it before entering the BIOS menu.

Usually a certain inscription is displayed on the monitor screen English language(press DEL to enter SETUP). Which talks about entering PC settings. The Delete key is often used. There are also other options for hot keys.

Keyboard shortcut options in Windows 7

• Ctrl+Alt+Esc
• Ctrl+Alt+Ins
• Ctrl+Alt

POST diagnostic programs and computer beeps

AWARD BIOS

AMI BIOS

DELL BIOS

IBM BIOS

AST BIOS

COMPAQ BIOS

PHOENIX BIOS

The signals from this BIOS come through a pause with short beeps. For example – 1-2-1 (1 beep, pause, 2 beeps, pause, 1 beep)

Conclusion

Do not take this information as completely reliable. Because your computer's audio signals may change as new ones are released. BIOS versions. This is where I end this post, I hope you found it useful...

Greetings, friends! Today I will tell you about BIOS sound signals. You may have noticed that when you turn on your computer, it makes a beeping sound or, in other words, beeps. This actually beeps your computer's BIOS, thereby telling you whether everything is fine with your computer or if there is any problem. Let's try to understand this topic in as much detail as possible.

What do the BIOS beeps mean when you turn on your computer?

Whatever BIOS is installed on your motherboard, you should hear one short beep when you turn on your PC. This means that everything is working fine and after it will start Windows boot. However, sometimes the opposite is true. The BIOS beeps like crazy, and the computer either doesn’t turn on at all, or the startup ends on the very first black screen - the BIOS bootloader.

This is where today's knowledge will come in handy. Because by this beeping you can determine what exactly is out of order in your PC.

Well, have you already looked at what BIOS you have? Now you can look at the decoding of BIOS sound signals.

BIOS AMI beeps. Full transcript

Decoding sound signals BIOS AWARD

This is how the Phoenix BIOS beeps in a special way

BIOS Phoenix squeaks a little differently than its brothers. It is more melodic, so to speak in this context. Dotted sound signals from the Phoenix BIOS alternate with pauses between them. And absolutely all signals from that BIOS are always short.

BIOS does not beep when you turn on the PC

Quite often it happens that when you turn on the PC, the BIOS does not beep at all. Why? Depends on the specific situation. To be in the know, first you need to know what a speaker is and why it is needed.

What is a motherboard speaker?

Motherboard speaker is a miniature high-frequency speaker that warns the user about malfunctions in the operation of your computer even before it is turned on. In other words, a speaker is a means of displaying information about the state of the computer. Also, a speaker is a device that produces BIOS sound signals!

This is what the speaker looks like on the motherboard. It is he who helps emit BIOS signals!

Some reasons why your PC may not beep at startup

It often happens that manufacturers budget computers(and not only budget ones) either forget to install the speaker on the motherboard, or deliberately save on this spare part. Accordingly, the BIOS does not beep, because there is simply nothing to beep. If you urgently need to diagnose a problem with your computer, you can simply borrow your friend's speaker for the day. Fortunately, pulling it out and inserting it will not be difficult for you.

Another reason why you may not hear BIOS beeps when you turn on your computer is that you accidentally touched it or pulled it, and it just became a little disconnected. In this case, insert it more tightly and everything will beep. By the way, there are also motherboards in which the speaker is not disconnected at all.

The BIOS does not beep on laptops, because they do not install a speaker on them for aesthetic reasons. Imagine if every time you turned on your laptop, it gave you a characteristic, high-frequency signal. It's annoying.

Especially if your wife has already fallen asleep, and you decide to play tanks in secret, you turn on the laptop, and here you are wearing BIIIIIIIP!!! Your wife immediately woke up and hit you with a star. In general, the speaker is not so relevant on a laptop.

Although some laptops can produce similar audio signals through external speakers and even headphones. Everyone who encounters this is trying to get rid of this squeak (pipiska) as soon as possible by any means.

Where and how to connect the speaker on the motherboard?

This will be useful for you to know if you decide to borrow the missing speaker from a friend or buy it. When you removed the speaker from a friend’s motherboard, you should have noticed that the place where it is connected is marked with characteristic inscriptions, most often it appears there Speaker or spk or spkr. The polarity of the speaker does not matter, so you can connect the speaker without error.

Several examples of motherboards with designated places for connecting a speaker.

Useful video about BIOS signals

Let's summarize

The article turned out to be quite lengthy, but I hope it helped you understand today’s topic. At a minimum, you can now connect the speaker to the motherboard and know why it is needed. We also looked at the decoding of sound signals for the main and most popular BIOS versions. If your BIOS version differs from those considered, then simply specify your request in a search engine, for example “ decoding BIOS sound signals IBM/DELL».

Did you read to the very end?

Was this article helpful?

Not really

What exactly did you not like? Was the article incomplete or false?
Write in comments and we promise to improve!

BIOS is the most important component of a computer, the activity of which is aimed at setting up the operation of the equipment, checking its functionality, launching the operating system, and more. One of the most unpleasant situations that a user may encounter is when the BIOS refuses to start.
Let's imagine a situation: suppose you decide to reinstall to Windows computer, but you must enter the BIOS in order to run the installer. You have made more than one attempt to enter the BIOS, and all of them were unsuccessful.

Another situation: when the computer starts, the user first sees the BIOS interface, after which the computer proceeds to load the operating system. In some cases, the user may not see any image at all, that is, neither the BIOS window nor anything else.

Reason 1: Wrong key (combination)

First of all, you should question the correct hotkey you are using to enter the BIOS. Unfortunately, you can only find out which key in your case is by experience, that is, it was not possible to enter the BIOS using one button, next time you should try another.

The process of entering the BIOS is as follows: you reboot the computer or simply turn it on and at the very first stage of turning it on, you begin to press repeatedly and quickly hotkey for BIOS.

There are a huge number of options for entering the BIOS (this is especially true for laptops), but in most cases you will find one of the following keys: F1, F2 and Del. If not a single key helps you enter the BIOS, try Googling the model of your motherboard (for a desktop PC) or laptop model on the Internet to find out how to enter the BIOS for your device.

Reason 2: Non-working or unsupported keyboard

And although in rare cases the user has the opportunity to enter the BIOS without a keyboard, in 95% of cases it is impossible to do without it.

Needless to say, a computer keyboard must be in good working order? Be sure to test the keyboard's functionality by logging into Windows or connecting it to another computer.

If everything is fine with the keyboard, then perhaps the problem is that the keyboard is not supported by the BIOS. As a rule, a similar problem is observed among users of old computers (laptops), and if you use a wired or USB keyboard, then this may well be the case.

If you have wireless keyboard, accordingly, we will need to use a wired one to eliminate the possibility of such a reason. Especially older BIOS versions may not support the USB keyboard interface, but to check this you will need to either connect old keyboard with a PS/2 connector or purchase a PS/2 adapter for a USB keyboard.

Reason 3: USB port not working

The port to which the keyboard is connected must be working. Try connecting the keyboard to a different port and try entering the BIOS again.

Reason 4: conflicting devices

One of the computer devices may have malfunctioned, resulting in a conflict, which is why you cannot enter the BIOS.
Try disconnecting everything possible from the computer: drives, hard disks or solid state drives, all USB devices connected to the motherboard, PCI cards. If there is a built-in video card, then disable the discrete one, and then try to enter the BIOS again. If the attempt is successful, connect one device to the computer at a time to find out what is conflicting. Having identified a problematic device, it is precisely this device that you will need to deal with (it is better to take it to a service center for diagnostics).

Reason 5: Computer malfunction

If, when you turn on the computer, the BIOS starts making sounds, but does not want to start, you should listen to the signals and record them. Often the BIOS uses such signals to make it clear what went wrong. There are a lot of tables on the Internet that decipher sound signals for different version BIOS, using which you can quickly understand the cause of the problem and begin to fix it.

Reason 6: Problematic BIOS settings

As a rule, a similar cause of the problem occurs when the user makes changes to the BIOS. In this case, you should try returning the BIOS to factory settings. As a rule, in most cases you will need to look under the system unit case, where on the motherboard you can find a special switch (CMOS jumper), which is set to position 1-2. To perform a reset, just move the switch to position 3-4 for 15-30 seconds, after which you can return it to its previous position.

Reason 7: Problems with the motherboard

The most unfortunate cause of this problem is that the motherboard is practically the entire computer. If you suspect a problem with its operation, you can carry out a short diagnostic procedure.

First of all, you will need to inspect the motherboard itself: is there any oxidation, are the capacitors swollen. Any external changes they talk about its malfunction, which means that all this needs to be eliminated. If there is oxidation, it must be carefully erased with an eraser. If the capacitors are swollen, they should be soldered with new ones.

If visually with motherboard everything is ok, you should try the following:

1. Disconnect your computer from the network, and also remove all unnecessary devices: mouse, speakers, keyboard, any additional devices and cables. As a result, only the network cable and monitor.
2. Reset CMOS. To do this, you should remove the battery from the motherboard for a few seconds and then install it back.
3. Remove all cards from all motherboard slots, leaving only the processor and speaker connected.
4. Start the computer and pay attention to the sound: if there is any sound, this tells you that the motherboard is working. If not, then everything is much sadder - she does not respond.

If you have confirmed your guess that the problem is in the operation of the motherboard, you should try to take it to a service center - it is quite possible that a specialist will be able to restore its functionality.

These are the main reasons that influence the BIOS not starting. If you have comments on the article, leave them in the comments.

Very often people ask me what they mean BIOS beeps when turning on PC. In this article we will take a detailed look at BIOS sounds depending on the manufacturer, the most likely errors and how to eliminate them. In a separate paragraph I will tell you 4 simple ways, how to find out the BIOS manufacturer, and also remind you of the basic principles of working with hardware.

Let's get started!

1. What are BIOS beeps for?

Every time you turn it on, you hear the computer beeping. Often this is heard from the speaker of the system unit. It indicates that the POST diagnostic self-test has successfully completed the test and has not detected any faults. After which the installed operating system begins loading.

If your computer does not have a system speaker, then you will not hear any sounds. This is not an indication of an error, just that the manufacturer of your device decided to save money.

Most often, I observed this situation with laptops and DNS stationary systems (they now produce their products under the DEXP brand). “What are the dangers of not having a speaker?” - you ask. It seems like such a small thing, and the computer works fine without it. But if it is impossible to initialize the video card, it will not be possible to identify and fix the problem.

If a problem is detected, the computer will emit a corresponding sound signal - a certain sequence of long or short squeaks. Using the instructions for the motherboard, you can decipher it, but which of us keeps such instructions? Therefore, in this article I have prepared for you tables with decoding of BIOS sound signals that will help you identify the problem and fix it.

Modern motherboards have a built-in system speaker.

Attention! All manipulations with the computer’s hardware configuration should be carried out if it is completely disconnected from the power supply. Before opening the case, be sure to remove the power plug from the outlet.

2. How to find out the BIOS manufacturer

Before looking for a decoding of computer sounds, you need to find out the BIOS manufacturer, since their sound signals are significantly different.

2.1. Method 1

You can make “identification” different ways, simplest - look at the screen while loading. The manufacturer and BIOS version are usually indicated at the top. To capture this moment, press the Pause key on your keyboard. If instead of the necessary information you see only the motherboard manufacturer's splash screen, press Tab.

The two most popular BIOS manufacturers are AWARD and AMI

2.2. Method 2

Go to BIOS. I wrote in detail about how to do this. Browse the sections and find the item - System Information. It should be indicated there Current version BIOS. And at the bottom (or top) of the screen the manufacturer will be indicated - American Megatrends Inc. (AMI), AWARD, DELL, etc.

2.3. Method 3

One of the most quick ways find out the BIOS manufacturer - use the Windows + R hotkeys and enter the MSINFO32 command in the “Run” line that opens. This way it will be launched System Information utility, with which you can get all the information about the hardware configuration of your computer.

Launching the System Information utility

You can also launch it from the menu: Start -> All Programs -> Accessories -> System Tools -> System Information

You can find out the BIOS manufacturer through “System Information”

2.4. Method 4

Use third party programs, they were described in detail in. Most often used CPU-Z, it is absolutely free and very simple (you can download it on the official website). After starting the program, go to the “Board” tab and BIOS section you will see all the information about the manufacturer:

How to find out the BIOS manufacturer using CPU-Z

3. Decoding BIOS signals

After we have found out the BIOS type, we can begin to decipher the sound signals depending on the manufacturer. Let's look at the main ones in tables.

3.1. AMI BIOS - beeps

AMI BIOS (American Megatrends Inc.) since 2002 is the most popular manufacturer in the world. In all versions, successful completion of the self-test is one short beep , after which the installed operating system is loaded. Other AMI BIOS beeps are listed in the table:

No matter how trivial it may sound, I advise my friends and clients in most cases turn off and turn on the computer. Yes, this is a typical phrase from the guys from your provider’s technical support, but it helps! However, if after the next reboot you hear squeaks from the speaker that are different from the usual one short beep, then you need to fix the problem. I will talk about this at the end of the article.

3.2. AWARD BIOS - signals

Like AMI, one short beep AWARD BIOS signals a successful self-test and the start of the operating system. What do the other sounds mean? Let's look at the table:

3.3. Phoenix BIOS

PHOENIX has very characteristic “beeps”; they are written in the table differently from AMI or AWARD. In the table they are indicated as combinations of sounds and pauses. For example, 1-1-2 would sound like one beep, a pause, another beep, another pause and two beeps.

4. The most popular BIOS sounds and their meaning

I could make for you a dozen more different tables with beep decoding, but I decided that it would be much more useful to pay attention to the most popular BIOS sound signals. So, what do users most often search for:

• one long two short BIOS beeps– this sound almost certainly does not bode well for anything good, namely problems with the video card. The first thing you need to check is whether the video card is fully inserted into the motherboard. Oh, by the way, how long have you been here? After all, one of the reasons for problems with loading may be banal dust that has clogged up in the cooler. But let's return to the problems with the video card. Try pulling it out and cleaning the contacts with an eraser. It would be a good idea to make sure there is no debris or foreign objects in the connectors. Still getting an error? Then the situation is more complicated, you will have to try to boot a computer with an integrated video camera (provided that it is on the motherboard). If it boots, it means that the problem is in the removed video card and you cannot do without replacing it.
• one long BIOS beep at startup– Possibly problems with RAM.
• 3 short BIOS beeps– RAM error. What can be done? Remove the RAM modules and clean the contacts with an eraser, wipe with a cotton swab moistened with alcohol, and try swapping the modules. Also possible. If the RAM modules are working, the computer will boot.
• 5 short BIOS beeps– the processor is faulty. A very unpleasant sound, isn't it? If this is the first time the processor has been installed, check its compatibility with the motherboard. If everything worked before, but now the computer beeps like crazy, then you need to check whether the contacts are clean and even.
• 4 long BIOS beeps– low speed or CPU fan stops. It needs to be either cleaned or replaced.
• 1 long 2 short BIOS beeps– problems with the video card or malfunction of the RAM connectors.
• 1 long 3 short BIOS beeps– either problems with the video card, or RAM problems, or keyboard errors.
• two short BIOS beeps – see the manufacturer to clarify the error.
• three long BIOS beeps– problems with RAM (the solution to the problem is described above), or problems with the keyboard.
• BIOS signals are many short– you need to count exactly how many short signals.
• The computer does not boot and there is no BIOS signal– the power supply is faulty, there is a processor performance problem, or there is no system speaker (see above).

From my own experience, I can say that quite often all problems with booting a computer are due to poor contact between various modules, for example RAM or a video card. And, as I wrote above, in some cases a regular reboot helps. Sometimes you can solve the problem by resetting the system board settings.

Attention! If you doubt your abilities, it is better to entrust diagnostics and repairs to professionals. There is no point in taking risks and then blaming the author of the article for something that is not his fault :)

1. To solve the problem it is necessary pull out the module from the connector, remove dust and insert back. The contacts can be carefully cleaned and wiped with alcohol. To clean the connector from dirt, it is convenient to use a dry toothbrush.
2. Don't forget to spend visual inspection . If some elements are deformed, have a black coating or streaks, the cause of problems with loading the computer will be in plain sight.
3. Let me also remind you that any manipulations with the system unit should be performed only when power is off. Don't forget to remove static electricity. To do this, it will be enough to grasp the computer system unit with both hands.
4. Dont touch to the pins of the microcircuits.
5. Do not use metal and abrasive materials to clean the contacts of RAM modules or video cards. For this purpose, you can use a soft eraser.
6. Soberly evaluate your capabilities. If your computer is under warranty, it is better to use the services of specialists service center than delving into the “brains” of the machine yourself.

If you have any questions, ask them in the comments to this article, we’ll sort it out!

Let's find out the reasons why the computer does not turn on: the speaker does not squeak or emits signals. That is, when when you press the power button, the computer does not show any signs of life, or if it does, it is not what we would like. The reasons can be as simple as no power, or as complex as a device (memory, HDD, etc.) has failed.

Before we begin to deal with this problem, you need to check the simplest thing:

• Is there a plug in the socket?
• Is the surge protector enabled?
• Is the light turned off?
• Pay attention to the monitor. The computer may be turned on, but the monitor itself is turned off via a button or there is no power. Is the monitor cable connected (VGA or DVI).

Of course, the above is mandatory so that you can see what is happening in the computer, but sometimes users do not pay attention to these points, thereby creating other complications that are more time-consuming.

220V does not come

Power may not be supplied to the computer if:

No voltage at input- for example, the socket is faulty. It’s easy to check - connect from another outlet, or plug in a known-good electrical appliance into this outlet. For example, a kettle, hair dryer or surge protector with indicator. Usually I use a surge protector to determine whether the outlet is working or not; if it lights up, then everything is fine with it. We think further.

On the back of the system unit there is a special button for the power supply. You need this button to be in position “1” - on, if “0” - off. If this button is missing, then you do not take any action at this stage.

The power cable may come loose- move it, or pull it out and connect it again.

The cable itself is faulty— test it with a tester or indicator. If you don’t have these tools at hand, you can take another power cable and replace it while checking. If the computer turns on, then the problem was in the power cable and you just need to replace it (the cost of the cable is about 100 rubles)

So, we are convinced that everything is in order with the cable, let's move on.

Monitor and video card

If you pressed the power button on the computer and it made a noise and turned on, then you need to check the cables from the system unit to the monitor. Very often the cables come off the monitor, so you don’t see anything on the monitor, but in fact the computer is turned on and working.

There must be a cable from the system unit that transmits the image to the monitor and a cable from the surge protector that supplies energy. If everything is in order with these cables, then pay attention to the video card (if you have an external one).

If the graphics card is faulty, a “No Signal” pop-up will appear on the monitor. First of all, you should check VGA cable or DVI, this is what kind of connection you have. Check whether it is inserted tightly and whether the contact pins are bent. Pull out the video card and clean the contacts with an eraser.

If all else fails, try pulling it out and switch the cable to the video card built into the motherboard, if there is one, of course.

Iron malfunctions

It all starts with the power button, and that's where we'll start. Now you need to open the cover of the system unit and look for breaks in the wires. Be sure to check it out!

BIOS signals

When you press the power button, the POST self-test program starts and if it fails (equipment is not connected or poor contact), the boot simply stops and the speaker (speaker) begins to emit beeps. Their sequence depends on the BIOS. From them you can determine the source of the error.

You will always find these signals in my article: “”. If you find out which device is faulty, try replacing it with another one, borrow it from friends or neighbors. If everything works, you can buy this component.

Broken wire for the Power button

From my own experience I can say that this problem rare, but it should not be discarded to the last stage of testing. If you have a broken wire from Power buttons, then you will not turn on the computer and therefore make sure that everything is in order with the wire that comes from this button.

Once I was testing a computer that did not want to turn on. It seemed like I did everything I could, but there was no reaction from the computer. Then I removed the front cover from the system unit and found a wire break there. In a couple of minutes I connected it, wrapped it with electrical tape and it turned on without question. Apparently, someone had already taken it apart before me and accidentally pinched this wire, thereby breaking it when closing the front cover.

So, if you have removed the cover of the system unit, then do not be too lazy to open the front cover.

power unit

Nowadays there is a choice to buy a power supply and of course people buy what is cheaper because they think that it will not affect the operation of the computer in any way. If you buy cheap Chinese block power supply, then we can say that your computer will live next to a powder keg, which may explode at the most inopportune moment.

Note: it is better to save, for example, on a computer case and buy a normal power supply.

The power supply is a very important component in a computer, as it supplies energy to all devices on the computer. Therefore, if your computer does not turn on - the monitor screen is black, then the power supply may be the cause of this breakdown.

In this section we will experiment, but if you have a spare power supply or borrow it for a while from another computer (neighbor or friend), then it is better to immediately connect another power supply to your computer. This way you will save your time. At a minimum, its characteristics should be the same as yours or better - that would be most correct. All data on the power supply can be found on the sticker located on it.

The very first thing you can do is disconnect the power cable from: the floppy drive, floppy drive and hard drive. Next, disconnect the video card, if you have an external one, and remove the RAM from the motherboard. Then try to turn on the computer. If the computer buzzes and turns on, then turn it off, connect one device, then turn on the computer, if it turns on, then connect another device, etc. You must understand what device prevented the computer from turning on.

To test the power supply you will need a voltage tester. Eh, sighed users who do not have this device. I understand you, but there are still people who purchased it, since electronic failures are not uncommon. We take a tester and any power connector that comes out of the power supply and measure the voltage. There should be 5V between black and red, and 12V between black and yellow.

If, when testing the power supply, the voltages differ from the numbers I mentioned above, then it’s time to go to the computer store for a new one. By the way, there are permissible deviations when measuring voltage. Approximately 5% is allowed. If you have, for example, 11.9, then everything is fine with your power supply and you need to look for the problem elsewhere.

If you want a modern power supply, then buy 400 - 500 W. Take the average one.

Often problems arise due to a low battery on the motherboard. If you have recently had occasions when your computer's time has gone wrong, then most likely you need to change the battery. The battery is inexpensive and you can buy it at any computer store.

To check the battery, remove it and check its voltage or simply replace it.

If the computer beeps and does not turn on, then it is possible that the memory sticks are faulty. There is also a small chance that the computer is not making any sounds because the speakers are not working. Remove the memory from the slot on the motherboard and clean the contacts with an eraser. Put them back in place and try to turn them on, if it still doesn’t turn on, take them out again and plug them in one at a time. Perhaps one line is faulty.

If there are other connectors on the motherboard that you did not use to connect the RAM module(s), then try using them.

BIOS

So, another option for what to do if the computer does not turn on. If you have recently made any changes to the BIOS, now you need to return the settings to default. Of course, the question arises: how to do this if you don’t see anything?

You need to disconnect the battery from the motherboard, connect power to the computer and press the power button several times. Next, leave the computer without the battery for 20-30 minutes and then connect it back.

If some messages appear on the monitor screen when you turn on the computer, but Windows does not load, then you can go to the BIOS and find a function to reset the settings to factory settings. Then do not forget to save the changes made in the BIOS by pressing the F10 button (usually).

Motherboard

So we come to the very last section of this article, and also the most disappointing one - the motherboard. If your motherboard is broken, repairing it can cost a pretty penny.

If you are going to repair it, then think, is there any point? Sometimes its repair can exceed 50% of the cost, and then the question arises: isn’t it easier to buy a new one?

So that you don’t have questions about why your computer won’t turn on and what to do in this situation, perform preventative maintenance on it once a year - clean out the dust and replace the thermal paste once every 2-3 years (approximately). By the way, dust in the computer greatly interferes with the operation of the computer, and once you have opened the system unit, clean everything from the inside.