Why the computer is turned off and how to find the cause

First of all, we divide the problem into two completely different reasons essentially. Does your computer shuts off by itself almost immediately after switching on or at a certain point during the direct boot of the operating system? If the shutdown occurs instantly - probably out of order, a component of a PC or laptop came out, for example, a short circuit occurred, which damaged the power supply, motherboard or processor.

If the computer is turned off while playing or loading the operating system, then it is also a hardware, but it is easier to localize it because you can test the special programs. Here we consider the general approach - when the computer is disconnected periodically or almost immediately after pressing the power button.

There are several reasons why the computer is turned off, so it is important to determine what reason is the most likely

The computer turns off while playing

Many users begin to join the video card. But it is worth noting that the video card with such a situation should be considered after checking the other two components of the computer. Usually symptoms if the computer and the video card is turned off when the game is turned off, others. The PC does not turn off, and the artifacts appear on the monitor.

The computer turns off due to problems with the power supply

If you periodically turn off the computer during the game, then most likely the reason in the power supply. Shutdown probably occurs for two reasons. The first: during the computer game the load on the video card increases.

In this case, the power supply, which is either not designed for such a peak load, or is simply poor, does not withstand. Therefore, the system unit is rebooting.

Check the power supply. If the computer is loaded for some time, this does not mean that the power supply in the computer works fine. According to the experience, the power supply is quite often the cause of shutdown than any other part of the system. Ideally, you need to replace the power supply to make sure 100% in its serviceability.

Why does a computer still turn off?

Problems with processor

Another reason when, when you start the game, the computer turns off, is the processor. More precisely, its critical temperature. It is also associated with improving the load - during the game the requirements for the processor computing power increase. Accordingly, the temperature is growing. If cooling on the CPU socket is poor-quality, then the protection is triggered, and the computer is suddenly turned off.

The described symptoms do not necessarily concern computer games. If your computer is turned off when viewing a video or launch of "heavy" applications, it is likely that it is also associated with an excessive load on the BP or processor.

The computer turns on and immediately turns off

It is possible more difficult. Along with the reasons described above, malfunctions can be manifested with other system nodes. If when you turn on the computer turns off, then it may be the reason in the motherboard or RAM.

RAM problems

Diagnostics breakdown Tip start with simple - with RAM. Symptoms of faulty memory are diverse. These are both system hangs, and "brakes" of applications and games, and even a banal reboot of the computer. As you can see, not everything is so unequivocal.

But to check the RAM should be one of the first, since it is less considerable and considerable in time compared to the motherboard. In more detail how to check the RAM - read here below.

Problems with motherboard

If everything is in order with memory, and the computer turns off when loading, the Council to pay attention to the motherboard. Testing the motherboard case for an unprepared person is not easy. Now - let's describe some symptoms that help determine that when you turn on the computer turns off because of the motherboard malfunction.

The first reason - the motherboard in general is already worn. Accordingly, it is most likely to repair its meaning because of the economic component. If the computer is not completely outdated, you can try to buy a replacement. If the PC barely stifles the brains, then it is worth thinking about buying a new computer. In this case, nothing will be done - the failure of the MatPlates is the strongest of the owners of obsolete computers.

The second reason is microcracks in the solder of the motherboard. There are two options here - a similar defect can go by itself, for a period of time, which happens rarely. Either you have to buy a new motherboard.

The third reason when the computer turns off immediately after switching on, is the failure of capacitors on the motherboard. This is also treated by overparaging capacitors to new ones. How to find out what a capacitor is bad, and which is not - described below.

Fourth reason. If a computer is turned off when booting Windows, then the chipset is overheated on the motherboard. You can check the multimeter. It is better not to check with your finger or tongue.

The computer turns off and turns on for other reasons.

In fact, the reasons may be many, and if you do not have the appropriate testing skills and checking equipment, then it may be better to call a specialist.

In addition to the problems described, the computer is spontaneously turned off for the following reasons:

Faulty wiring
Faulty extension cord or UPS
Dust in the system unit (see photo)
Voltage drops
reduced voltage in the network

All this should not be discounted, especially since the verification of these factors does not take much time. By the way, the reasons may be the program properties. For example, if the computer is turned off every 2 hours, then the viruses are possible in the computer and you need to remove them.

Make sure that the power supply voltage is set correctly. This applies to old computers, modern power supplies do not suffer from these archaism. However, if the input voltage for nutrition does not comply with the standards (highly understated), the computer may not turn on. Most likely, the computer will not turn on at all or will constantly reboot if the network is insufficient voltage.

Check out the possible causes of short circuit inside the computer. It is very often the reason for turning off the computer when the PC seems to start, but then immediately turns off. Of course, this is advice for those who have the necessary knowledge.

Check the power button on the front panel of the computer enclosure. It often happens that the button sticks out, and therefore the computer cannot turn on, constantly disconnecting.

Also Tip Try Reinstall All Computer Components:

Check all cables from the power supply
Reinstall memory modules
Change the video card to another connector if possible

Disconnect and re-connect the keyboard and mouse. Of course, it is unlikely that they are the reason for such a serious problem, but also to exclude them. Reinstall the processor if you suspect that it is incorrectly cooled. The chance that the computer is turned off due to the processor is not the largest, so this procedure must be performed after checking other components of the computer.

Try to turn on the computer only with the most necessary: \u200b\u200bprocessor, RAM and video card. If after that it will earn, then the problem is in the disabled equipment. If the computer is still turned off, you can return everything to the place and look for the reason.

How to check why the computer turns off by itself

So, now directly to check the reasons for which the computer is constantly turned off. Check that it is the easiest way to get the replacement of that part of the system to which the suspicion fell. But to start the Council to clean the computer from dust.

To remove the processor from suspected - it is necessary to replace the thermal collapse and test it with special programs, for example, using a program for testing a processor and S & M RAM. It is best to check the processor temperature via BIOS, in the corresponding section:

RAM can also be checked by the MEMTEST86 specialized program to check the memory in DOS. If in the process of checking it will find critical errors - it is worth thinking about its health.

The power supply can be checked using a multimeter. Naturally, this opportunity is available for a prepared person. Warning - Do not climb into equipment under high voltage, no appropriate skill

The motherboard is fairly easily checked visually - on the subject of swollen capacitors. Of course, the microcracks do not check that. But if the whole thing is in microcracks, the fee can be thrown out with a calm soul, or try it carefully and high-qualityly spelling it.

All this can be replaced with one check, excluding the component that is under suspicion, and replacing it 100% workers. True, this method is not available to everyone, but it is effective and relatively simple. This is especially true of the motherboard, the symptoms of the malfunction of which when the computer turns off after switching on, can be so diverse that you can take away half of the system unit before you get to it

Often there is a situation when a simple user, after a long period of normal operation, a computer, suddenly, starts to disconnect yourself. Quite often, the reason for this is quite easily eliminated by its own forces. Let's try to figure it out - why it happens, and how to fix the problems that have fallen.

Causes of turning off PCs and solutions

The computer may turn off due to many different reasons, among which you can select both software and hardware. In general, it is possible to roughly determine - what is the reason for behavior. So, if the operating system does not have time to start loading - then the probability of hardware problems is high.

Otherwise, there may be problems of any nature, including software, more often due to various kinds of malicious software. However, first of all you need to know - why this happens.

Malicious programs

A variety of programs creating many troubles for users, moreover, there are a great set. There are those that, after their boot, make a disconnection of a PC.

PHOTO: Computer shut off unfortunately

We will discern what to do to either eliminate this option, or eliminate the problem.

First, you need to create a boot disk, or a flash drive with anti-virus software. At the sites of manufacturers of antivirus programs, this kind of images are offered for free, with full instructions for creating boot disks. Although this will require a "healthy" computer, with internet access.

Photo: Multiple USB Flash Drive

By creating such a drive, it follows:

Note. A full test can occur for a long time, up to several days - depends on the number and nature of recorded information, as well as on overall system performance.

If after checking the system is similar to work at work, or does not have time to boot - then the problem is definitely hardware.

Low power or malfunction BP

When the PC does not even have time to start the download, or the previous option uniquely pointed to the hardware problem, then often the culprit of the problem becomes a source of secondary nutrition in the computer itself. Or, as an option, simply too low voltage in the AC 220V network.

Photo: Multimamer shows low nutrition

First, it is necessary to check the voltage of the AC network. To help this can either "familiar electrician" or a universal device - a multimeter. Ideally, the network voltage should be 220 volts, however, deviations in the amount of 10% are allowed. Those. At 240 or 200, the power supply must work normally.

In the event of a voltage deviation for the permissible limits, it is necessary to either solve the problem, referring to the electricians, or establish a voltage stabilizer, which is used enough.

In the power supply itself, if the problem is not in the outlet, there may be faults of the following character (when the computer is periodically disconnected):

• emergency shutdown, as a result of overheating - possibly, the cooling fan failed, or the inner part of the power supply is strongly contaminated;
• physical degradation of the components of the scheme (more often of condensers) - usually after the "warm-up" begins to work normally;
• excessive load of the components of the system unit - emergency shutdown, as a result of overload;
• the accident signal from the motherboard is the malfunction of the operation of the built-in converters or others. (Though it is already not BP).

What needs to be done to correct the situation:

By and large, if the cleaning of dust solved the problem, then it's good. In other cases (except for the option, when the system does not work with an obviously good power supply), the source of the secondary nutrition is best replaced. But in the version of the unequiolation of the system at a well-good power supply, the problem lies in other components.

Overheating of the processor or video card

After long-term operation, or with the initial marriage of some components, a situation is possible when the computer is disabled due to overheating of important components. For example, the cooling radiators of the central or graphics processor can "infect" dust and stop performing their functions.

If the computer turns off by itself, after 5 minutes of work, then first it is necessary to check the cooling systems.

To which initially pay attention, tells the nature of the behavior of the PC:

When using software to determine elevated temperatures, there is no possibility, and the BIOS displays quite adequate values \u200b\u200b(after all, the load in this mode is missing), then you should simply have a visual inspection and prevention of cooling systems.

First of all, it is necessary to make sure that the cooling systems are reliably fixed in their places, and the fans on them (if any) rotate without outside sounds and efforts. When the fan is very noise, or it is difficult to rotate, then it should be replaced.

Prevention CO is made as follows (simple enough):

However, cases are possible when prevention does not help (either a computer at all). In this case, the cooling system is possible simply not coping with the task, because She lacks performance. This can be both incorrect calculation in production and loss of efficiency, due to wear.

Therefore, a more subtle approach is needed, which is also useful in the case of one-time problems that have not yet been "broken" into a serious problem. In addition, such control will help prevent problems.

Video: The computer is turned off

The temperature is overestimated, I will know in AIDA

All major PC systems are equipped with built-in components of control and self-diagnostics. So the central processor, the video card and chipset is equipped with temperature sensors. Their readings can be seen in the BIOS, or take advantage of special programs in the OS environment.

One of the most common programs of this kind (as well as possessing many other useful functions) is AIDA. Therefore, she will use it. Installations it does not require - just download, and you can immediately run. The program must be downloaded by the corresponding version. If you have a 64-bit version of the OS (now most such a majority), then the program is needed AIDA64.

The launch itself is carried out by a double click on the executive file of the program (AIDA64.exe or aida.exe, respectively for the 64 bit and 32 bit version). After starting, in the left part of the program window (entitled "Menu"), you must select the "Sensors" item, after which the readings of all temperature sensors in the system will be displayed on the right. Useful to check the temperature readings during the operation of resource-intensive applications, because When loading, they increase.

Temperature should not (ideally) exceed 70 degrees Celsius. However, many powerful solutions allow the heating of the crystal up to 100 degrees. However, the lower the temperature - the better. When it comes to a critical mark - then output explicit - the cooling system of the corresponding component does not cope.

Why the computer turns off spontaneously

Above lists only the main, most common problems. However, everything can be much easier. For example, it can be easily adding the power button on the system unit. Having a small experience - you can easily determine such a defect to the touch, but does not place this option to eliminate more accurate methods.

For example, you can simply turn it off from the motherboard, running the PC manually closed the corresponding contacts. If the computer stopped turning off - then the reason is determined. It will only remain to eliminate the defect.

In many cases, it is necessary to start checking from this position. But if the reason is not in the button, then proceed to checking the other possible options described above.

It turns off after a while what to do ...

We will analyze - in which algorithm to determine such a malfunction:

In order to produce all the above operations, it is necessary to have at least minimal knowledge of the PC structure. If it was not possible to fix the problem (which is unlikely), then you should contact the specialists. Although it is possible to replace the PC entirely, which is also a way out.

As a result, the main part of the problems with spontaneous disconnection arising, according to statistical data. In 99% of cases, there are precisely such problems that are relatively simple causes. Eliminate them is also not difficult.

However, other kinds of malfunctions are also possible, with similar symptoms, for example, the unstable operation of the current converter on the motherboard (valid for both the video card). In this case, you can either replace the main component or contact the service center.

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the computer turns on and immediately turns off

The problem with a personal computer is quite intricate, when it starts when it is turned on, but after some time, it usually varies from a few seconds to half an hour, it turns off.

The first reason why the computer turns on, and then turns off, it may be that for any reason has become faulty or does not work at all, since it is necessary, the computer power supply. This can occur as a result of several reasons, for example, due to the fact that in the inside the power supply could have hit any foreign body, which inside the block causes a short circuit, with the result that this device goes into the protection mode, that is, turns off the computer. In this case, you need to disassemble the system unit of your PC, remove the power supply and thoroughly spend it, then insert into place, connect and check the computer for performance. The thing is that no foreign body can not fall into the power supply, and the dust accumulated in it, which makes it difficult to work the device (interferes with the rotation of the fan, causes the discharge of electrostatic current and so on). In addition, the power supply could and simply "burn", for example, due to the long work of the computer and the voltage jumps on the network, as a result of which, again, the protection mode and the computer turns off. To check this argument. It is necessary to find a hundred percent of the power supply unit, connect it to your computer and run, if within an hour, everything will work perfectly, and the computer will not turn off, then, therefore, it is in the computer's nutrition.

Another, quite a common reason that some time after the computer is turned on, it turns off, is the malfunction of RAM schedule, without which the launch of the computer is in principle possible, but only a short time. As a rule, the reasons for which may fail and become non-working RAM strips can be the most varied, ranging from static electricity and ending them with overheating. In this case, solve the problem of turning off the computer, you can only replace the RAM.

Another problem associated with the fact that the computer turns off after a while after it was included, is that it is overheating, it is especially true for the personal computer processor. Overheating may result from the fact that the cooler, which is engaged in cooling the processor, does not cope with its task. This can occur as a result of the fact that a cooler, or on a cooling grid, a too large amount of dust accumulated, which worsens heat outflow, as well as as a result of the fact that the cooler simply has exhausted its reserve. This problem is especially observed on laptops that are cleaned with their users extremely rarely, if they are cleaned at all. The solution to this problem is obvious - cleaning the personal computer from dust, or replacing the non-working cooler (if it takes place) to a new, efficient one.

No less common cause is the refusal to the working capacity of the motherboard or its main nodes, such as connections, some capacitors, and so on, and here already, you want to be replaced by the motherboard.

A no less common reason for which the computer does not turn on is a failure in the loading area of \u200b\u200bthe microcomand - BIOS, which is just the same and is responsible for the normal functioning and launching devices on the computer. Failures can occur as a result of the fact that you turn off the computer is not using the PC command (Start menu - shutdown), and by pulling out the plug from the outlet or pressing the button on the network filter. So do not do, otherwise you can completely ruin your computer. In addition, the BIOS may be damaged by the virus from the Internet, which, despite the fact that there is not so much, but still find ways to the user computers. Restore the system after such viral attacks is quite difficult, and almost impossible for newcomers. It is the easiest way to repair and establish the performance of your computer, is to appeal to the specialists of the Helpüzer service center, who will arrive home in a timely manner, and this is already a big enough plus, since it is not necessary to travel around the Polgorod to the service center you need, losing your time. Qualified specialists and experienced masters will fully diagnose your personal computer, they will have problems, successfully eliminate them, and your computer will again become functioning in normal mode.

It became available to all segments of the population. Now you can buy a computer each: the abundance of specialized stores allows you to choose the optimal model, and the availability of training literature is to deal with the azami work. Despite this, the owners of computers and even laptops sometimes arise situations when they have to resort to the services of specialists who can eliminate various malfunctions. Nevertheless, much more convenient not to depend on the help of third-party people, but to be able to diagnose possible problems themselves and be able to restore the performance of the technique. That is why today we will look at why this is one of the frequent problems that sometimes have to deal with a rather wide range of users.

If the computer turns on and immediately turns off, then in the interval between this, the speaker connected on the board usually issues a number of intermittent signals. There are special tables for which, knowing the order of signals, you can determine the cause of the failure. Otherwise, the search is performed by indirect features.

Before you begin to clarify the reasons, it is necessary to turn off the entire auxiliary periphery from the board: the hard drive, the drive for CDs, the audio adapter, all connected to the device ports (except for the keyboard), the housing loop (wires to the Power, Reset button, etc.). In addition, the power wire should remain alone - only to the motherboard, the remaining branches turn off.

Perform a test switching on. To do this, on the board with a small screwdriver closing two POWER contacts. Problem still exists? We read on.

If the computer turns on and off immediately, you must check the BIOS settings. Of course, this is possible only if there is enough time between inclusion and disconnection. Many boards have a setup item, automatically turning off the computer in one of two situations: the central processor fan does not rotate (faulty) reached the exposed limit. Recall actions to enter the BIOS: Immediately after turning on the computer, you often click the DEL key.

We should not forget about the possibility of resetting the BIOS (this is the next step, if the previous one did not give results). On the motherboard there are special pins signed by "Clear CMOS". We find them directly on the board or first in the instructions, and then closing the contacts to reset the settings to the factory.

The following reason, because of which the computer is immediately turned off - these are problems with the processors of modern graphic solutions sometimes fail: it is enough to remember the "dump" chips of the NVIDIA video cards. We take out a video card from the connector and turn on the computer without it. If the spontaneous shutdown does not occur, the "culprit" is defined. It is necessary to re-insert it into the connector and check the performance, and on the basis of the results, make a decision: leave or acquire a new one.

The computer submits signs of life - piercingly becomes a speaker, it means there is a chance to do with "low blood", since the motherboard is intact.

If, after turning on the computer turns off, then you need to leave only one can also try to rearrange it into another connector.

The last reason why the computer turns on and immediately turns off, is the malfunction of the motherboard itself. Very often, when connecting the extension boards (for example, sound and video adapters), the motherboard is greatly bent, and the soldering on the elements is broken to the conductive paths. Owners of the boards of the old generation (and budget new) are faced with natural damage to electrolytic capacitors - the smallest barrels. If this happened, the behavior of the board depends on the circuit in which the condenser is located: the computer can be disconnected both instantly and after time.

The cooling fan is placed in the power supply, if it stops working, the protection against overheating scheme turns off the power supply. An indirect reason: an excessive amount of powerful components connected to the computer.

Summarize:

Turn off all unnecessary from the board;

Check the BIOS, reset the settings;

Localize a hardware malfunction.

If you encounter such a problem as an involuntary shutdown of a computer, then you need to know the reasons for what is happening that will prompt you what to do next to get rid of such sharp turns off PCs. We want to immediately note that it can be turned off itself, both a computer and a laptop, and most importantly - for this, some serious problems with the "hardware" do not always lie, it is easy to turn the virus. But let's all in order.

6 reasons why the computer itself turns off

1. Virus. One of the most common reasons is a virus that causes the computer to turn on their own without your instructions. To do this, check the entire PC to viruses.


2. Overheating computer components. Spend, since the dust layer can cause overheating, and also pay attention to the coolers, they all have to spin quickly.


3. Fault in the power supply. Another frequent reason is a breakdown of the power supply, it can burn from voltage drops and excessive loads from the components.


4. Malfunction in RAM. This type of malfunction is characterized by the fact that before turning off the computer begins to hang and all functions to be brazed. To exclude the RAM from the list of reasons for turning off the computer, we recommend inserting another instead of it, as well as contact the specialists in the service center.


5. Breakdown motherboard. The spontaneous turning off of the PC will be caused by either a crack or scroll on the motherboard or the combustion of the condenser. In general, this is due to strikes on the system unit or its fall or due to the fact that the motherboard has already been "talked." We do not exclude, of course, also marriage, but it is quite rare. Again, to independently determine whether the motherboard is guilty, without using special equipment - you can not.


6. Bad contact. Determine and fix this breakdown is quite simple - check the density of fastening of all cords starting from the outlet, because there may be a problem in the network filter. All plugs must be tightly inserted, both outside the system unit and in it.