Your computer just starts up and shuts down

Your computer won’t turn on: PC turns on and then shuts down right away

Your computer powers on and then shuts down right away? If this is the case, you probably have a serious hardware problem.

There are several reasons why your computer turns on and immediately shuts down during the boot process or does not turn on.

Important: If your computer does not turn on or you see nothing on the screen then take a closer look at the “Computer does not turn on: PC does not show any signs of life” User Manual. this is the most applicable guide to fixing problems.

Time needed: from several minutes to several hours depending on why the computer does not turn on

Cooling system malfunction

First of all, if you encounter a sudden computer shutdown immediately or almost immediately after turning it on, you should look under the system unit to see if there is dust and dirt.

If the computer has not been cleaned for years, then the dirt and dust may have accumulated in large quantities on the coolers, boards, microcircuits, etc.д. If you see that there is enough dust in the system unit, it is necessary to collect it with a vacuum cleaner, and then gently brush off the residue with a brush.

Pay special attention to the cooling system: thoroughly clean the heatsink and cooler and dust, and replace the thermal paste between the heatsink and the processor. After reassembling the computer, turn it on and check whether the cooler rotates. it is possible that the fan is out of order and may need to replace it.

We recommend you do this procedure once in six months: it’s very simple, it takes no more than 15 minutes, and it actually extends the life of your device to a much greater extent.

The computer switches on and then shuts down right away

Today, in this article, I will consider the problem when the computer turns on and immediately shuts down, and I will try to describe all the reasons why it happens description how to eliminate them.


The computer turns on and then shuts down right away. this is a problem that occurs not very often and not only on computers. If you have such a problem with your laptop, then the article “The laptop turns on and shuts down immediately” is exactly what you need.

By the way this article “Computer turns on and immediately shuts down” on the content, will differ little from similar about a laptop. Let’s break it into several parts, each of them will have a headline with the cause and below that the solution. Here is a complete list of things that cause a computer to turn on and then shut down. Clicking on the desired item you want to list. you immediately jump to the place in the article, which is written in detail about the problem and how to solve it.

Here is the list itself:

Let us probably start with the most common problem, the one that causes the computer to wake up and then shut down. If the PC is not getting enough stable power it will not work. First we need to check if you have a power failure. It is possible that someone near you is welding and the light is blinking and as a consequence the computer can not work properly. You should also check if the power cable itself is damaged.

Also the efficiency of the surge protector.

But in fact, more often the problem lies in the power supply. (PSU) This is a computer component which is responsible for supplying power to all the elements of a computer. It is very important that the PSU is fully operational, because in the case of overvoltage, it “takes care of itself”. That is not the whole PC burns out, but only the power supply itself.

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But let’s go back to the moment when the computer turns on and immediately shuts down. The power supply may be old and just not giving enough power to the components that are connected to it. After this it will look like this: The computer switches on and shuts down in seconds or just a few seconds. Sometimes it also fails to turn on at all. (Probably a blown fuse). To learn more about why a PC doesn’t power on, click here.

Way out of this situation is simple enough, you need to borrow a power supply unit from a friend, connect it to your PC and try to turn on. If it works, you can safely go to the store and buy a new power supply.(I don’t recommend repairing an old PSU, because it is dangerous to mess with the power supply. The next time it can burn out not only the power supply but the whole computer.)

To learn how to replace the PSU yourself click here.

If you yourself are poorly versed in the PC and not confident in your abilities, it is better to take the system unit in the service center.

There are cases when a user decides to learn what BIOS is and what it is all about. As a result they change something there and save the changes. After saving the changes the computer shuts down, then turns on and can either go straight to reboot, or shut down. It can also display a message on the screen of the monitor. (Sometimes it is enough to type this message into a search engine and find similar cases and find out how they were advised to solve the problem) It says that with this configuration BIOS, PC can not start, so it (BIOS) must be reset. See how to do it in the video below.

If the reset doesn’t help and the computer continues to turn on and immediately shuts down, you may need to flash BIOS, and if you can’t do it yourself, I recommend taking your PC to a service center. But first try to finish this article and try all the solutions mentioned here. Chances are high that you can bring your PC back to life on your own.

Very often the computer powers on and shuts down because the CPU is too hot. As soon as its temperature gets to a critical level it triggers an emergency shutdown of the PC. If the temperature is critical the computer freezes horribly.

By the way, if you do not know how to check the temperature of the processor, motherboard and hard drive, and want to see how the cooling will cope with the temperature at maximum load, the article “System stability test” is just what you need.

But let’s get back to cleaning the PC. In fact it is not such a difficult task. You are required to carefully study these articles: “Cleaning the computer from dust”, “Replacing thermal paste”, “How to lubricate the cooler?”Preferably use a vacuum cleaner that blows out air or a can of compressed air. (Available at any computer hardware store) Be sure to remove all computer components from their seats (video card, processor cooler, RAM, etc.) before cleaning.e) and blow them out.

After cleaning, I strongly recommend performing a system stability test. A link to an article on how to do this test is above.

The motherboard is faulty.

Of course, when the computer turns on and then shuts down, there is a high probability that the motherboard is faulty.

Let’s agree: If you have tried all the methods described in this article and nothing helps, then most likely this is a serious matter, and you can’t do without the help of the service center.

Ways to fix the problem

Some manipulations and settings can solve the problem.

However, before you start troubleshooting, check if your computer’s on/off button is stuck.

It is possible that after turning on the computer fans start, but immediately shut down and the computer goes out. this is due to the fact that the stuck button started the shutdown process, only completing the power-on.

If the problem occurs after manipulating with hardware components

This is the situation when the problem occurred after cleaning the computer, replacing thermal paste, motherboard, clean assembly or changing any components.

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Communication failure

If there are no notifications or signals on the screen, check if the processor is powered. This is a very common problem.

CPU and motherboard are connected by two loops. If one of them is not connected (usually the wide one), the described problem will occur.

But the computer will start anyway (there will be a characteristic noise), but the screen will not turn on.

Short circuit

Motherboard shorting is an unpleasant but common problem that requires replacement.

A short circuit occurs almost always with the case and may be due to many reasons.

Without special skills the user can only check whether there are special stands between the case and the board. and if they are in place, you will not be able to determine the cause of the problem yourself.

If the standoffs are missing, it is an indication that the computer was not assembled properly. The board can still work if the problem is fixed.

If the standoffs are in place, the board is most likely completely malfunctioning and needs to be replaced by a service.


The problem occurs after you have cleaned the computer, changed the thermal paste. The computer worked for at least a few minutes after it was first turned on, and shut down after shorter and shorter intervals with each subsequent turn on.

This is a sign of severe overheating caused by incorrectly replaced thermal paste.

The following errors are typical and cause a malfunction:

  • Too thick a layer of thermal paste;
  • A gap in the form of an air bubble between the processor cover and the heatsink;
  • There are factory stickers on the heatsink or other components that the unit is placed in the chassis with.

You must also realize that if thermal paste, which can conduct electricity, was selected for replacement, excessive thermal paste may have caused a short circuit.

Important! Exactly because of such defects and possible malfunctions it is not recommended to try to clean the computer yourself, to change its components, not having enough skill.

Other types of problems

In some situations, the problem occurs when there are other flaws in the assembly of computer components.

Therefore, check the following:

  • Connecting the video card. sometimes you need to apply pressure to do this, because the loop may not be fully connected;
  • Density of the RAM insertion. if the slat is not tightly connected, the operating system and BIOS will not boot;
  • Bent legs of the processor. if they are bent, it may have to be replaced;
  • Connecting the fan to the PC power supply;
  • Support of the new processor by the rest of the system components, BIOS (if changed);
  • Try to disable the drives and SATA devices, it is possible that they are the cause of the problem, and if they are disabled the computer will not shut down.

Specific problem, typical for computers with system units. the error of connecting the front panel to the device. The power on/off button on the PC may not work correctly.

If the problem occurs without manipulating the hardware components

We are talking about a situation where the problem occurs all of a sudden. That is, at the previous start everything was working fine, and now the computer shuts down immediately after turning on.

There has been no manipulation with its components, no dropping, bumping.

Old PC problems

If the device is old enough (you can’t give an exact figure, because it depends on the original parameters of the PC), then it is possible that any hardware component in the system is physically worn out. There may be short circuits, problems with contacts, power supply failure (especially if the BIOS beeps when you turn on, which was not there before). Dust accumulation also causes the problem.

You can determine that it is the physical wear and tear of a component if the problem has increased gradually. earlier the computer turned on without problems, then the second or third time, but now it doesn’t turn on at all.

In this case the growth of expression can occur quite quickly.

This type of problems can be quite difficult to eliminate, so it is better to replace the device.


The RAM is one of the most vulnerable components, it fails quite often and quickly, particularly in case of burning/short circuits.

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To help in this situation can only be complete replacement.

Hardware compatibility

The problem when the screen does not react to power on may be caused by a sudden conflict between the integrated graphics card and the discrete card.

If this is the case you need to disable discrete video chip and check the monitor’s functionality by connecting to the output of integrated video card.

Try to disable all additional hardware modules to eliminate the cause of the problem. Leave only connected


The RAM card is one of the most vulnerable components, it often and quickly fails, in particular, its contacts burn/short-circuit.

To help in this situation can only be full replacement.

Hardware Compatibility

The problem when the screen does not react to power on can occur with a sudden conflict between the integrated graphics card and a discrete.

The problem with the unit shutting down immediately after being switched on is often due to unskilled manipulation of hardware components. That is why it is important not to try to fix it yourself.

If it is not associated with operational, software failures, it is better to apply for diagnosis and repair to the professionals.

The problem associated with the failure of the device immediately after turning on is often associated with illiterate actions with hardware components. That’s why it’s important not to try to fix it yourself.

If it is not related to operational, software failures, it is better to apply for diagnosis and repair to specialists.

Reasons for the computer shutting down right after switching on

The first thing you should start diagnosing is the power button. It often happens that it simply falls or starts to seize due to a worn fixing mechanism.

How to turn on the computer without the power button. closing the pins with a screwdriver

You may try to disconnect the pins of the button and try to start the motherboard by shorting the power pins. You will learn more about it from this article.

How the problem is localized?

If there is a problem with the power, these consequences are possible:

The computer immediately shuts down after being switched on

Here things can be a little more complicated. Together with the causes that are described above, faults in other computer components can also manifest themselves in this way. So, if your computer immediately shuts down when you turn it on, the first thing you should pay attention to is the RAM or the motherboard. Here it is recommended to diagnose from simple to complex, and you should start with the RAM.

    RAM problemsFactors that accompany RAM malfunctions can be different. The system may freeze, games and applications may “slow down”, the computer itself may suddenly reboot on its own. As we can see, not everything is so obvious.Nevertheless, the RAM should be checked first, if only because it is the least time-consuming procedure, requiring less time than checking the motherboard. The following article will describe in more detail how to check the RAM.

Motherboard Failure

If none of the above has not helped you, then with a high probability you can judge about the failure of the motherboard, which is likely to require replacement.

Why the motherboard slots for RAM are different colors?


Good day to you all. The problem with the motherboard Eisrock P43DE. After manipulating the memory switch in BIOS, the computer went out and began incomprehensible, the motherboard is on and in 2 seconds goes out again, then restarts itself and so on without end. Resetting BIOS did not get anything. Changed the CPU also nothing, remove the memory works. use again the same problem. Thought I put the memory to another mother and no memory working, what screwed up is unclear, all components were removed and reinstalled on another mother, Asus, all works fine. What did I burn with this multiplier?

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