Why does the computer start to turn on and then immediately turn off? Contamination of the system unit and overheating of components. Let's start with the simplest
Why does the computer turn off and how to find the reason
First of all, let's divide the problem into two completely different reasons. Does your computer turn off by itself almost immediately after turning it on or at a certain moment during the immediate loading of the operating system? If the shutdown occurs instantly, some component of the PC or laptop has probably failed, for example, a short circuit has occurred that damaged the power supply, motherboard or processor.
If the computer turns off while playing or loading the operating system, then this is also a hardware part, but it is easier to localize it, since it can be tested with special programs. Here we will consider the general approach - when the computer turns off periodically or almost immediately after pressing the power button.
There are several reasons why a computer turns off, so it is important to determine which reason is the most likely.
Computer turns off while playing
Many users are starting to blame the video card. But it is worth noting that in such a situation the video card should be considered after checking the other two components of the computer. Usually the symptoms if the computer turns off while playing and the video card is to blame are different. The PC does not turn off, but freezes or artifacts appear on the monitor.
The computer turns off due to problems with the power supply
If your computer periodically turns off while playing, then most likely the reason is the power supply. The shutdown probably occurs for two reasons. First: during a computer game, the load on the video card increases.
At the same time, the power supply, which is either not designed for such a peak load, or is simply of poor quality, cannot withstand. Therefore, the system unit reboots.
Check the power supply. If the computer takes some time to boot, this does not mean that the power supply in the computer is working normally. In my experience, the power supply is more likely to cause a shutdown than any other part of the system. Ideally, you need to replace the power supply to make sure it is 100% in working order.
Why else does the computer usually turn off?
Processor problems
Another reason when the computer turns off when starting a game is the processor. More precisely, its critical temperature. This is also due to an increase in load - during the game the demands on the processing power of the processor increase. Accordingly, the temperature also rises. If the cooling on the CPU socket is poor, then the protection is triggered and the computer suddenly turns off.
The symptoms described do not necessarily apply to computer games. If your computer turns off when watching a video or running “heavy” applications, then most likely this is also due to the increased load on the power supply or processor.
The computer turns on and then turns off immediately
This is perhaps more complicated. Along with the reasons described above, malfunctions with other system components may occur. If the computer turns off when you turn it on, then the reason may be the motherboard or RAM.
Problems with RAM
When diagnosing a breakdown, the advice is to start with something simple - with RAM. Symptoms of faulty memory are varied. These include system freezes, application and game lags, and even a banal computer reboot. As you can see, not everything is so simple.
But you should check the RAM first, since it is less expensive and time-consuming compared to the motherboard. Read more about how to check your RAM here below.
Problems with the motherboard
If everything is in order with the memory, and the computer turns off when loading, the advice is to pay attention to the motherboard. Testing a motherboard is not an easy task for an unprepared person. Now, let's describe some symptoms that will help determine that when you turn on the computer, it turns off precisely because of a malfunction of the motherboard.
The first reason is that the motherboard is generally already worn out. Accordingly, it most likely makes no sense to repair it due to the economic component. If the computer is not very outdated, then you can try to buy a replacement. If the PC can barely move its brain, then you should think about buying a new computer. In this case, nothing can be done - the failure of the motherboard hits the pockets of owners of outdated computers the hardest.
The second reason is microcracks in the soldering of the motherboard. There are two options here - such a defect can go away on its own, for a certain period of time, which rarely happens. Or you will have to buy a new motherboard.
The third reason when the computer turns off immediately after turning it on is the failure of the capacitors on the motherboard. This can also be treated by resoldering the capacitors with new ones. How to find out which capacitor is bad and which is not is described below.
Fourth reason. If your computer turns off when Windows boots, the chipset on the motherboard may be overheating. You can check with a multimeter. It is better not to check with your finger or tongue, as you can get burned.
The computer turns off and on for other reasons
In fact, there can be many reasons, and if you do not have the appropriate testing and equipment testing skills, then it may be better to call a specialist.
In addition to the problems described, the computer turns off spontaneously for the following reasons:
Faulty wiring
faulty extension cord or UPS
dust in the system unit (see photo)
voltage drops
low voltage in the network
All this should not be discounted, especially since checking these factors will not take much time. By the way, the reasons may also be software related. For example, if the computer turns off every 2 hours, then the computer may have viruses and needs to be removed.
Make sure the power supply switch is set correctly. This applies to old computers; modern power supplies do not suffer from this archaism. However, if the input voltage for the power supply is abnormal (too low), the computer may not turn on. Most likely, the computer will not turn on at all or will constantly reboot if there is insufficient voltage in the network.
Check for possible causes of a short circuit inside the computer. This is very often the reason why the computer turns off, 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 of the computer case. It often happens that the button gets stuck, and therefore the computer cannot turn on, constantly turning off.
Also, advice to try reinstalling all computer components:
Check all cables coming from the power supply
Reinstall memory modules
Plug the video card into a different slot, if possible.
Disconnect and reconnect your keyboard and mouse. Of course, it is unlikely that they are the cause of such a serious problem, but they should not be ruled out. Reinstall the processor if you suspect it is not cooling properly. The chance that the computer shuts down due to the processor is not the greatest, so this procedure should be performed after checking other components of the computer.
Try turning on the computer with only the essentials: processor, RAM and video card. If after this it works, then the problem is in the disabled equipment. If the computer still turns off, then you can return everything to its place and look for the reason further.
How to check why the computer turns off by itself
So, now let’s move on to checking the reason why the computer constantly turns off. The easiest way to check what exactly is wrong is to replace the part of the system that is suspected. But first, the advice is to clean your computer from dust.
To remove a processor from being a suspect, you need to replace the thermal paste and test it with special programs, for example, using the S&M program for testing the processor and RAM. It is best to check the processor temperature through the BIOS, in the corresponding section:
RAM can also be checked with the specialized program MemTest86, for checking memory in DOS. If during the verification process it finds critical errors, you should think about its serviceability.
The power supply can be checked using a multimeter. Naturally, this opportunity is available to a trained person. Warning - DO NOT GET INTO HIGH VOLTAGE EQUIPMENT UNLESS YOU HAVE THE APPROPRIATE SKILL
The motherboard is quite easy to check visually - for swollen capacitors. Of course, microcracks cannot be checked this way. But if it’s all about microcracks, then you can throw the board away with peace of mind, or try to carefully and efficiently vacuum it.
All this can be replaced with one check - eliminating the component that is under suspicion and replacing it with a 100% working one. True, this method is not available to everyone, but it is effective and relatively simple. This is especially true for the motherboard, the symptoms of a malfunction of which, when the computer turns off after turning on, can be so varied that you can go through half the system unit before you get to it
Good day! Today’s article will discuss the topic of why “The computer turns on and immediately turns off.” If you have a similar problem, I advise you not to rush to send your computer for repairs, but rather try to solve this problem. After all, such failures can occur on a new computer. So what to do? Don’t take it straight to the master, I will help you resolve this issue.
Why does my computer turn on and then immediately turn off?
If your computer malfunctions and immediately turns off when you turn it on, then you need to deal with it in order. I propose to consider the reasons for this failure and solutions.
The first reason is a violation of the cooling system
If the computer starts to turn on and immediately turns off, then it would be worth looking under the case of the system unit. There may be dust and dirt inside. If your PC has not been cleaned for a year or more, then, of course, dust and dirt have accumulated inside. You need to clean the cooler, board, microcircuit, etc. This is done with special care, using a vacuum cleaner. The remains are cleaned with a brush.
The second reason is problems in RAM
If your RAM is connected incorrectly or is faulty, the computer may turn off and then turn on. Inspect the PC's RAM: is everything in order, are all the sticks connected properly?
If several RAM sticks are connected to the PC at once, then inspect them separately.
The third reason is a problem with the power supply.
The most important device in a computer is the power supply. If you are faced with the fact that the computer is trying to turn on, then perhaps the whole problem is in the block. Inspect the inside of the block. By the way, it can also be clogged with dust.
The fourth reason is a problem with the motherboard
The motherboard can influence such failures. For example, a connector has stopped working, or there is a problem with the capacitors. As a rule, in this case the motherboard has to be completely changed.
The fifth reason is a BIOS malfunction
Often this problem occurs if you have recently made changes to the Bios. Most likely, you set the parameters incorrectly, and this led to computer crashes. You can simply reset the BIOS settings, which will solve the problem.
Why does my computer turn on and then immediately turn off after assembly?
The user assembled the computer himself, and suddenly he has such a problem - the computer turns on for a second. In this case, it is recommended to check whether the PC is installed correctly, whether the cooler is connected correctly, or whether it is in the right connector. If everything is fine in the cooler, then inspect the processor to see if it is installed correctly. If the problem is not solved, then in this case you will have to contact a specialist.
In fact, there are many reasons for such a failure. Find the reason and eliminate it, and if something doesn’t work out, write to me in the comments and we’ll solve your problems together. I look forward to your questions and smiles in the comments, peace to all!
Does your computer turn on and then turn off immediately? If so, then most likely you have a serious hardware problem.
There are several reasons why your computer turns on and immediately turns off during the boot process or the computer does not turn on.
Important: if your computer does not turn on, or you do not see anything on the screen, then read in more detail the instructions “The computer will not turn on: the PC does not show signs of life” - this is the most applicable guide to troubleshooting problems.
Difficulty: medium
Time required: from several minutes to several hours, depending on why the computer does not turn on
How to fix a computer that turns on and then turns off
- If you hear a beep when you turn on your computer, this suggests that in this way you can eliminate the causes of PC problems.
- Next, you need to make sure that the mains voltage is within normal limits.
- Check all possible causes of a short circuit inside the computer. Often, this is the reason why the computer turns off immediately after turning on. The computer may stay on for a second or two, but then shuts down completely.
- The power supply needs to be tested. Even if your computer turns on, this does not mean that it is working properly. If the power supply is not working properly, replace it.
- Also check the button Reset, which is located on the front of the computer system unit. Maybe this is what is causing the short circuit.
- Try reconnecting all PC components: cables, memory modules and boards.
- Try reinstalling the processor if you suspect it may have become loose or is not seated properly.
- Start your PC with all the necessary hardware. Our task is to turn it on with a minimum amount of equipment, while maintaining its functionality.
- Reconnect each hardware and test your computer after each installation.
- Test your PC using the card's power-on self-test. The PC will help determine which part of the remaining equipment is to blame for the breakdown.
- Try replacing the hardware on your computer to determine which piece of hardware is causing your computer to shut down automatically. Test your computer after each hardware replacement to determine which hardware is at fault.
- And finally, if all the other methods I gave above did not work and did not help eliminate the cause of the problem, I recommend that you seek professional help from a computer repair service center. Or - for technical support directly from the manufacturer. Experienced specialists will be able to answer the question of what to do if the computer does not turn on.
The sound signal gives a very good idea of where exactly to look for the cause of your computer failure.
If this method does not help you fix the problem in this way, you can always return here and continue troubleshooting using the information that will be presented below.
If the computer is connected incorrectly, this can also lead to a failure. Additionally, incorrect power settings may cause your computer to shut down on its own.
Important: In order not to waste extra time, you need to inspect your computer from the inside for problems that could cause a short circuit.
If you are not in a hurry, pay the greatest attention to this stage of testing in order to eliminate all possible causes of a short circuit, and subsequently avoid unnecessary costs for expensive equipment replacement.
Tip: if you decide to replace the power supply, then after replacing it you need to keep it turned on for at least 5 minutes before trying to turn it off and start using it. This will give the CMOS battery time to recharge a bit.
The processor is a rather sensitive element of the computer, but if it is the reason that the computer turns on and turns off immediately, it is quite easy to fix the problem. So don't worry!
If your computer turns on and stays on with the necessary hardware, refer to step 9.
If the computer does not turn on or turns off on its own, go to step 10.
Important: troubleshooting is easy enough for any user and does not require the use of any special tools. In addition, it can provide a lot of very valuable information. This step should not be skipped if after all the steps above, the computer still turns off by itself.
Since your computer is turned on, all components are working properly. This means that, apparently, one of the devices was disconnected or connected incorrectly, which caused the computer to turn off by itself. After reconnecting each device and testing, you will be able to find out for sure which device caused the computer to malfunction.
Replacement of faulty equipment should occur immediately after you have identified the cause. Hardware settings may come in handy after you reinstall your hardware.
If the computer does not turn on, go to step 11.
Most PC users have a large number of spare computer parts. The computer won't turn on - go back to step 10. The card isn't expensive, and it's a much smarter approach than stocking up on spare computer parts.
Unfortunately, if troubleshooting by unplugging and plugging equipment and replacing computer parts is unsuccessful, there is another, small option that is much better than relying on individuals and companies.
If your laptop does not turn on or a black screen appears when booting, read the article “Laptop does not turn on - black screen”
If I missed any point or you have any questions, you can write and ask questions in the comments. You will receive an answer in the shortest possible time.
It became available to all segments of the population. Now anyone can buy a computer: the abundance of specialized stores allows you to choose the optimal model, and the availability of educational literature allows you to understand the basics of work. Despite this, owners of computers and even laptops sometimes have situations when they have to resort to the services of specialists who can troubleshoot various problems. And yet, it is much more convenient not to depend on the help of third parties, but to be able to diagnose possible problems yourself and be able to restore the functionality of the equipment. That is why today we will look at why This is one of the common problems that a fairly wide range of users sometimes have to face.
If the computer turns on and immediately turns off, then in the interval between this, the speaker connected to the board will usually emit a series of intermittent beeps. There are special tables that, knowing the order of the signals, can be used to determine the cause of the failure. Otherwise, the search is performed using indirect criteria.
Before you begin to find out the reasons, you need to disconnect all auxiliary peripherals from the board: hard drive, CD drive, sound adapter, all devices connected to the ports (except for the keyboard), casing cable (wires to the Power, Reset button, etc.). In addition, there should be only one power cable left - only to the motherboard, disconnect the other branches.
We perform a test run. To do this, use a small screwdriver to close two Power contacts on the board. Problem still exists? Read on.
If your computer turns on and then turns off immediately, you need to check your BIOS settings. Of course, this is only possible if enough time passes between turning on and off. Many boards have a setting item that automatically turns off the computer in one of two situations: the CPU fan does not rotate (faulty), or has reached the set limit. Let us recall the steps to enter the BIOS: immediately after turning on the computer, you need to frequently press 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 produce results). There are special pins on the motherboard labeled “Clear CMOS”. We find them directly on the board or first in the instructions, and then close the contacts to reset the settings to factory settings.
The next reason why the computer immediately turns off is problems with the processors of modern graphics solutions sometimes failing: just remember the “failure” of NVidia video card chips. We remove the video card from the connector and turn on the computer without it. If spontaneous shutdown does not occur, then the “culprit” has been identified. You need to reinsert it into the connector and check its functionality, and based on the results, make a decision: keep it or buy a new one.
The computer is showing signs of life - the speaker beeps shrilly, which means there is a chance to get by with “little loss”, since the motherboard is intact.
If after turning on the computer turns off, then you need to leave only one. You can also try moving it to another connector.
The last reason why a computer turns on and then turns off immediately is that the motherboard itself is faulty. Very often, when connecting expansion cards (for example, sound and video adapters), the motherboard bends greatly, and the soldering of the elements to the conductive paths is broken. Owners of old generation boards (and budget new ones) over time are faced with natural damage to electrolytic capacitors - those very small barrels. If this happens, then the behavior of the board depends on the circuit in which the capacitor is located: the computer can turn off either instantly or after a while.
The power supply contains a cooling fan; if it stops working, the overheating protection circuit cuts off the power supply. Indirect reason: an excessive number of powerful components connected to the computer.
Summarize:
We disconnect everything unnecessary from the board;
Check the BIOS, reset the settings;
We localize the hardware fault.
The computer turns on and then turns off immediately
A rather complicated problem with a personal computer is when, when you turn it on, it starts, but after some time, usually it varies from a few seconds to half an hour, it turns off.
The first reason why the computer turns on and then turns off may be that for some reason the computer's power supply has become faulty or is not working quite as it should. This can happen for several reasons, for example, due to the fact that some foreign body could get inside the power supply, which causes a short circuit inside the unit, as a result of which the device goes into protection mode, that is, it turns off the computer. In this case, you need to disassemble the system unit of your PC, remove the power supply and thoroughly vacuum it, then put it back in place, connect and check the computer for functionality. The thing is that no foreign body could have gotten into the power supply, and the culprit is the dust accumulated in it, which complicates the operation of the device (interferes with the rotation of the fan, causes electrostatic discharges, and so on). In addition, the power supply could simply “burn out”, for example, due to long-term operation of the computer and power surges in the network, as a result of which, again, the protection mode is turned on and the computer turns off. To test this argument. You need to find a one hundred percent working power supply, connect it to your computer and start it, if within an hour everything works perfectly and the computer does not turn off, then, therefore, the problem is in the power supply of the computer.
Another fairly common reason that some time after turning on the computer it turns off is a malfunction of the RAM sticks, without which the computer can in principle be started, but only for a fairly short time. As a rule, the reasons why RAM strips can fail and become inoperative can be very diverse, ranging from static electricity to overheating. In this case, the problem of turning off the computer can only be solved by replacing the RAM.
Another problem associated with the fact that the computer turns off some time after it was turned on is that it overheats excessively, especially when it comes to the processor of the personal computer. Overheating can occur as a result of the fact that the cooler, which is responsible for cooling the processor, does not cope with its task. This can happen as a result of too much dust accumulated on the cooler or on the cooling grill, which impairs the flow of heat, or because the cooler has simply exhausted its reserve. This problem is especially common on laptops, which are “cleaned” by their users extremely rarely, if at all. The solution to this problem is obvious - cleaning the personal computer from dust, or replacing a non-working cooler (if this is the case) with a new, functional one.
An equally common reason is a failure of the motherboard or its main components, such as connectors, some capacitors, and so on, and here, whether you like it or not, the motherboard will have to be replaced.
An equally common reason why a computer does not turn on is a failure in the boot area of microcommands - BIOS, which is responsible for the normal functioning and startup of devices on the computer. Failures can occur as a result of the fact that you turn off the computer not through a command on the PC (START menu - Shutdown), but by unplugging the plug from the socket or pressing a button on the surge protector. You should not do this, otherwise you can completely ruin your computer. In addition, the BIOS can be damaged by a virus from the Internet, which, despite the fact that there are not many of them, still find their way onto the user’s computers. Restoring a system after such virus attacks is quite difficult and almost impossible for novice users. The easiest way to repair and improve the performance of your computer is to contact the specialists of the HelpUser service center, who will arrive at your home in a timely manner, and this is already quite a big plus, since you do not have to travel halfway around the city to the service center you need, wasting your time. Qualified specialists and experienced technicians will conduct a complete diagnosis of your personal computer, identify problems, successfully eliminate them, and your computer will once again function normally.
