The screen goes blank for a second on the computer

The monitor screen goes off quickly. What to do

Received a letter with a question that the monitor screen goes off quickly. Verbatim:

Teach me what to do so that in my laptop the monitor does not go out so quickly when I read texts?

Of course, there are serious problems with monitors, and finding solutions to such problems can be quite serious business. So in some cases, even calling a specialist cannot be dispensed with.

But, also in many cases, the monitor screen quickly goes out simply due to the installed power settings.

Therefore, first of all, novice users just need to pay attention to these settings, which is what we will do in this article.

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Let’s talk about Windows 7 first, and then about Windows XP, so choose where you need to deal with the monitor screen.

Power settings in Windows 7

So, you have the operating system Windows 7 and the monitor screen quickly goes blank, whether it is a laptop or a stationary computer.?!

We go to the Power supply section. To do this, simply right-click on the power icon on the Taskbar (as shown in the screenshot below) and select Power supply in the context menu that appears:

If you do not see the power icon on the taskbar, in this case, click on the small triangle icon (in the picture to the left of the power icon) with the left mouse button and find the power icon.

You can enter the power supply in another way.

Start menu. Control Panel:

Next, select System and Security:

So, whether we entered the Power supply section through the Taskbar or through the Start menu, now in the selected power plan we click on the link with its settings:

And already here we can configure the way we need:

How long does it take to dim the display (monitor) or turn it off so that it goes out completely, as well as when to put the computer into sleep mode and adjust the screen brightness.

over, for a laptop, this can also be configured separately: From battery or From mains.

And, of course, after changing the settings, you need to save them for them to take effect:

So, if your monitor (laptop) screen goes blank quickly enough, try here to increase the time in the appropriate parameters (when to dim and turn off the display).

Since we have “climbed” into these settings, then, perhaps, it will be interesting for someone to delve into the additional settings:

But, this does not apply to the topic raised, so I will leave it for independent development, especially since everything is quite intuitive there.

Power settings in Windows XP

You have Windows XP operating system on your computer or laptop and you notice that the monitor screen goes blank quickly?!

We go to the Start menu. Control Panel:

Further, at the very end of the large list, we find Power Supply. We go there:

screen, goes, blank, second, computer

First, we choose a suitable power management scheme (as shown in the picture below), since perhaps some of the proposed schemes may suit us in terms of parameters (or at least approximately it may fit).

And we configure the parameters as we need. In particular, if, for example, we believe that our laptop’s screen goes blank quickly, then in the Display off column we increase the time (after how long to turn off the display):

Do not forget to click on the Apply button and then on OK for the changes to take effect.

So, if we think that on our computer (laptop) the monitor screen goes out quickly enough, then first of all we go to the Power supply to adjust it there. And here it was shown how to do it in Windows 7 and Windows XP.

screen, goes, blank, second, computer

If you are faced with a situation where not only the monitor screen turns off, but the laptop screen turns off completely, you can go to the article: The laptop screen turns off. What to do.

Unstable operation of the monitor power supply

It also happens that the monitor screen periodically goes out for 1-2 seconds, and then the image appears as if nothing had happened. This could indicate a problem with the monitor’s power supply not coping with power surges, or poor cable pins. Less likely reasons for this behavior are malfunctions of the motherboard itself, a conflict of video cards (it is recommended to disable one), problems with RAM (rare).

Hardware problems

It is not uncommon for a monitor to shut down spontaneously due to a variety of hardware problems. A commonplace situation is damage to a cable or connector. If the cable is old or has been exposed to strong external influences, it is likely that it is defective. Inspect it, make sure there are no kinks and kinks, at the same time check the health of the connectors and adapters. Replace the cable with a new one to completely eliminate cable problems.

Overheating of hardware components

Overheating of components, including a graphics card, does not always lead to a BSOD or shutdown of the computer. Increased loads, arising, for example, when launching particularly demanding games, may well cause disconnection of individual components. If the monitor goes out during the game, and the system unit continues to work and the audio is also reproduced normally, then overheating is very likely. The problem is solved by cleaning the system unit, installing a more efficient cooling system, replacing thermal paste.

Defective monitor

You cannot discard the option with a malfunction of the monitor itself, however, in this case, it will most likely remain dark or go out a few seconds after turning on the computer, although there are exceptions when the monitor screen periodically goes out for a couple of seconds. The first may indicate a problem with the backlight lamps, the second may indicate a malfunction of the voltage inverter.

In order not to guess what is the matter here, disconnect the monitor from the system unit. If it works, the message “No signal” or “Cable disconnected” should appear on the screen, otherwise it will indicate a problem with the display itself. If possible, try connecting the monitor to another PC.

Malfunction of the video card

This is another reason why the monitor goes blank while the computer is running. What to do in this case? As a rule, the video card is replaced, but before that you still need to make sure that the problem is caused by it. Remove the video card, check it for swollen capacitors, traces of oxides, etc., make sure the contacts are in good condition, and then reinsert. If you have another computer at hand, test the video card on it.

System settings

First of all, consider a situation where we are not really talking about some kind of malfunction. A very common reason why the monitor turns off while the computer is running is the function to turn off the display after a certain time, which is available in all popular versions of Windows. True, it is activated only if the user does not perform any actions on the PC. If this is your case, open the settings for the current power plan and see if you have set the time for the Turn off display setting. If yes, select “Never” from the drop-down list.

The monitor screen goes blank while the computer is running. why does this happen?

At first glance, it might seem that a monitor is a less important piece of hardware in your computer than, say, a processor or hard drive. This is partly true, since the display, if it is external, is easier to replace, but if it fails, both the processor and the hard disk are useless, because managing the system without an interface becomes impossible. And, I must say, problems with the display are not such a rare phenomenon, and most often users have to deal with its sudden shutdown.

An opportunity can happen at any time, the monitor periodically goes out and seems to be without a reason, although there is, of course, one. And, in general, there can be a great variety of reasons, so problems often arise with the diagnosis of this problem. For example, when the monitor turns off, but the computer continues to work, this can indicate both a hardware malfunction and malfunctioning graphics drivers, and, unfortunately, the first reason has to be encountered much more often.

Nevertheless, at first it is still worth excluding the software component. If you removed or updated the video card drivers before, it is quite possible that the problem is caused by the new version of the video driver. In this case, it is recommended, after booting in safe mode, to remove the problem driver and install a working one, or roll back to a previous restore point. If the monitor turns off during a game, it could also be a driver failing to cope with its tasks. This happens when you run “heavy” games that are demanding on the hardware resources of the video card. Here, on the contrary, it makes sense to update the drivers to the latest version or install software from a third-party developer, for example, NVIDIA.

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What else is causing the monitor to turn off suddenly? Let’s figure it out.

Incorrectly selected resolution

The fact that the monitor turns off during a game or just work, sometimes the wrong resolution is to blame. If, using third-party tools, you set a resolution that exceeds the capabilities of the monitor, it is very possible to disable the latter, especially when starting games. An obvious sign of an incorrectly selected resolution is the message “Out of range”.

In this case, you need to boot into safe mode and lower the resolution to the system default.

As you can see, it is rather difficult to unequivocally answer the question of why the computer screen goes blank during operation. The reasons for this may be a carriage and a small bogie; finding a true one for an ordinary user who does not have the appropriate knowledge is often a difficult task. Checking the system settings, contacts and the load on components is, perhaps, everyone can do, as for the diagnostics and repair of equipment, it is better to entrust this matter to specialists from the service center.

The screen goes blank for a second on the computer

Many budget (and often expensive) laptops have a problem when the screen goes blank while playing or typing.

Naturally, in this case, each user has a question: why does the laptop screen go blank during operation and how can this trouble be eliminated without spending money on maintenance?

As an inexperienced laptop user, sometimes you can solve the problem of a dying screen without the help of a computer wizard.

What needs to be done to make sure of breakage?

First, you need to make sure the laptop does not automatically go to sleep. To do this, just move the mouse or move your finger on the touchpad (touchpad). Secondly, if the screen is dim (but not black), the reason may be a failure of the screen settings.

In this situation, you need to check the settings and restore the optimal ones for work.

Because of what the screen may go blank?

If the settings and sleep mode have nothing to do with it, the following may cause the screen to go blank:

Operating system error, Windows crash. To solve this problem, you will need to reset the BIOS settings, and then reinstall the OS. If the dying screen began to pester after a new version of the operating system was installed, you need to roll it back to the previous version.

The problem is in the power settings. For this reason, the screen turns off very often, as the laptop goes into power saving mode in order to extend the charging time and, accordingly, increase the period of use until it is completely discharged and turned off.

The solution is to select new settings in the “Power” section, which is located in the “Taskbar” or in the “Control Panel” / “System and Security”.

In the “Settings” section, you need to select a period of time after which the system will automatically dim the screen in order to save energy. You can also individually adjust the brightness of the screen in the operating mode.

The Power Options tab allows you to make an appropriate power plan active. It is rational to use the one recommended by the system itself. The new settings will take effect after they are saved.

Dirty, dusty laptop. Cleaning the laptop should be done regardless of the state of the technology. Excessive dust accumulated in the laptop can cause the monitor to flicker and even darken.

Gathering of drivers. Often the laptop screen goes blank due to the unstable operation of the video card driver.

Reinstalling the driver may resolve the screen dimming or blanking issue. But there are times when the video card itself burns out, one of its nodes fails, or the power cable that communicates the video card and the power supply is damaged, which requires hardware repair, which is impossible to do with your own hands without special tools and certain knowledge and experience.

Infection of the laptop with malware. Often, it is viruses in a laptop that can provoke a darkening of the screen during the operation of computer equipment. In order to cure a laptop and eliminate this problem, it is enough to install a high-quality licensed antivirus program on it.
Sometimes you just need to analyze in what situation, at what time, which causes the darkening of the laptop screen.

Perhaps this problem occurs due to the download / activation of a third-party application or program of questionable origin. In this situation, it is advisable to clean the laptop of such programs.

When you may need specialist help?

There are a number of problems with a laptop, accompanied by a dying screen, which can only be eliminated by a master. These problems include:

Failure of a spare part that serves to illuminate the screen.

As a spare part, both the backlight itself and an inverter or a loop that transfers power supply to components can act. In the latter case, when the lid is closed, the screen blinks.

After diagnostics, the work to restore the screen consists in repairing or replacing a spare part.

Failure of the matrix, motherboard. This breakdown can only be eliminated at the service center by replacing the screen with a new one.

If you cannot find the cause of the breakdown on your own, you need to contact a specialist as soon as possible, since such problems can cause other breakdowns, the cost of repairing which will be much more expensive.

Be sure to contact the service center master if the reason for the dying laptop screen is a technical or electronic component.

Regardless of whether the cause belongs to the hardware or software category, after an in-depth diagnosis, it will be identified and eliminated as soon as possible.

What to do if the monitor screen in the computer goes blank and turns off

There are various factors that cause the lcd monitor screen to turn off on its own or go blank, and they apply to everyone, not just, for example, LG, benq, Samsung, asus or acer.

This can happen during the game, immediately upon switching on, after a second, after a few seconds, constantly or intermittently.

In this case, the monitor may go out, and the system manager may continue to work (noise is heard, indicators are on), in other words, the computer itself does not turn off.

First of all, you should be aware that in most cases, the monitor turns off or goes blank due to hardware components.

For this reason, most solutions face problems generated by components that directly or indirectly affect the correct operation of the monitor.

It is very important, before applying the instructions below, to check the documents and the computer, whether the warranty period remains on it.

If there is a guarantee, and you want to violate it of your own free will, then think carefully about whether it is worth doing.

IMPORTANT: the author of this article is not responsible for damage of any kind, caused directly or indirectly through the implementation in practice of the instructions posted below.

Monitor does not start after turning on the computer

  • Make sure the video card is properly connected to the motherboard.
  • Check that the existing video card is compatible with other components of your computer (you can get information on the manufacturer’s website).
  • If you recently added new hardware, disable it temporarily.
  • Try the video card from another computer to find out for sure that the problem is not with it.

The monitor goes out periodically due to overheating of the component

This problem occurs most often because the computer fan periodically does not go through the cleaning process.

Dust and lint build-up on the fan blades, grill and components over time prevents the system unit from getting proper ventilation.

Under such circumstances, the computer shuts down to prevent possible damage caused by exposure to high temperatures.

For this reason, it is recommended that you check that everything is in order and that all existing computer fans are working properly.

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The monitor turns off and turns off after a certain amount of time.

  • Try connecting your monitor to another computer (where possible) to determine exactly if it works.
  • Turn off the system, disconnect the power supply, open the cover on the right side (viewed from the front) and check that the fans are clean and unobstructed.
  • Use good security software that always installs the latest updates, analyzes your system for possible viruses, spyware, malware, worms, etc.

If there is dust, it must be removed. To do this, you can use compressed air, or even a vacuum cleaner, only with it carefully.

Determine the video card manufacturer, download the driver for your operating system, install it and restart your computer.

If the operating system does not support the graphics card, the only solution is to replace it with a compatible one.

The monitor turns off at startup or goes out through damaged components

When a computer component fails, it is replaced. It seems logical, but in many cases it does not take into account the capacity of the power supply.

It is very important that you have enough food. Replacing a computer component is not replacing a light bulb!

Insufficient power supply will cause the computer to shutdown abruptly or the monitor will black out.

When replacing a video card, hard drive or any other component, you must make sure that the existing source is able to offer sufficient power needs.

Otherwise, replacing one component with another, and even more powerful one, can lead to problems.

The monitor goes out constantly in games

There is nothing special to describe the reasons here. Better to just explain the process. If the monitor turns off spontaneously in games, then this is a direct indication of a weak video card.

Most of all, the load is created by games, and the video card is largely responsible for their work, which sends signals to the monitor, and it turns them into an image.

If the video card cannot withstand the load, then in order not to fail completely, the sensor turns it off, as a result, a dark screen is obtained or the monitor simply goes out.

What can be done? Check the temperature while playing, for example, with this program. Sometimes there is only one way out. to replace the video card with a more powerful one.

You can also update the driver if a newer version is released. The description above is of course not the final verdict. there may be other reasons.

Viruses and malware

You are probably asking yourself, “Why does this monitor go off and on. There is no dust on the fans, I haven’t changed anything I have the best antivirus that a friend gave me two years ago. What kind of dirty trick is this? !? “.

Oddly enough, but viruses may well become the reason that the monitor screen goes blank. If your antivirus is free, then you should know that all free ones only provide basic protection.

Believe me, no one will update your antivirus database every hour for free. No matter what someone tells you, there are no such virtues.

By no means am I urging you to switch to a paid antivirus program. Whatever super-duper she is, the viruses of the lonely can miss.

Hackers are always one step ahead. specifically, you need to scan your computer with at least two antivirus programs from different manufacturers.

I recommend two free and healing utilities. doctor Web and AVZ. They will not conflict with the antivirus that you currently have installed. It does not need to be removed or disabled.

If you checked everything (as described above), but nothing helped, then the only available solution remains: contact the service authorized by the manufacturer or ask a question here in the comments with a detailed description of the essence of the problem. Success.


One of the most common causes of monitor self-shutdown is RAM failure. To detect such problems, there are special tools for checking RAM for errors. Even in the event of a malfunction in a single module, this is enough to periodically turn off the monitor while the PC is running.

RAM modules are unsuitable for repair, therefore, if problems are found in their operation, you should purchase new ones.

MemTest86 is one of the best tools for testing RAM for errors. To work with it, you will need to create a bootable media with this program and set the BIOS to boot from a USB flash drive. After completing testing, the program will display the results.

System RAM Checker

Another way to check the RAM does not require additional software. There is a special tool in the OS itself.

  • Press the key combination “Win” “R”. This will bring up the standard Run window.
  • Enter in the line “mdsched”.

Next, select the option to run the RAM check.

  • After rebooting, the diagnostic procedure will start, and upon completion, the test results will be displayed.
  • Thus, to determine the cause of the monitor’s inoperability, the user will need to follow a series of steps. Some of these activities relate to simple and effective exclusion diagnostics. For example, display and cable hardware problems are easily identified. Software methods require quite a long time, but you cannot do without them to exclude a malfunction of the RAM.

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    Why does the monitor go out while the computer is running

    If the screen turns off periodically while the computer is working, then the cause of this problem does not always lie on the display itself. It can be associated with a video card, connection cable, RAM operation, etc. There are many reasons, and this article is devoted to the consideration of the main ones.

    Monitor abnormalities

    Problems with permanently turning off the display are among the most difficult. It is very problematic for an ordinary user to diagnose and identify the cause at home. Such violations are associated with either hardware or software malfunctions. The former, as a rule, require contacting a service center, and the latter can be learned to identify by studying this article.

    Malfunction of the video card

    Another logical reason for the constant turning off of the monitor screen can be a hardware failure of the graphics adapter. For such cases, the following is typical:

      The appearance of various artifacts on the screen (stripes, distortions, broken lines, etc.)

  • Video driver error messages appearing in the system tray.
  • BIOS special signals when booting the computer.
  • Read about what should be done in such cases at the link below:

    Overheating of the video card

    All modern PCs (including laptops) have two graphics cards on their motherboards: an internal and an external one. In the default BIOS settings, preference is given to the video card that is considered to be more productive (usually discrete). Therefore, it is necessary to monitor the temperature of the external graphics module.

    In most cases, the normal operating temperature of the graphics adapter is considered to be less than 60 degrees Celsius. But this is almost impossible to achieve on powerful video cards. The maximum peak (100% load) is usually defined at 85 degrees. For individual GPUs, the peak maximum reaches 95 degrees.

    For almost all existing GPUs, the upper limit is 105 degrees. After that, the graphics module of the board lowers the frequency for cooling purposes. But such a measure may not give a result and then the PC reboots.

    The first step is to make sure that the graphics card is not cooling properly. For this, there are, for example, temperature monitoring software. Consider two of them.

  • If you have a discrete video card, then it should be selected from the drop-down list. If not, then the integrated video card will be specified by default (1).
  • In the line “GPU Temperature” you can see the current temperature of the map (2).
    • Launching Speccy, in the main window of the program, select on the left “Graphics Devices”.

  • Next, we look at the temperature of the desired component of the motherboard.
  • Let’s look at the main reasons leading to insufficient cooling of the graphics adapter.

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    If the PC has not been cleaned of dust for a long time, then it’s time to start. There is a possibility that the dust inside the system unit or on the cooler of the video card does not allow the latter to cool normally. Dirt and dust on the card cooler itself in especially severe cases can cause it to stop. Dust cleaning does not require special skills: you need to disassemble the system unit or open the laptop case, then use a vacuum cleaner or a soft brush. It is recommended to carry out such cleaning at least 2 times a year.

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    Design features of the laptop

    Some laptop manufacturers do not think about a reliable heat dissipation system already at the design stage of a certain model. In such cases, portable computers have, for example, very small grilles on the case, which logically leads to constant overheating of the entire device. Here you should take care of placing any stand on the back (or front) of the laptop, lifting it.

    Alternatively, you can use special cooling pads for laptop PCs. They allow more intense air to run through the computer. There are models that are USB powered and also have their own battery.

    Loss of thermal paste properties

    Heat transfer between the GPU and the cooler is carried out through a special intermediary. thermal paste (or thermal interface). Over time, the substance loses its properties, which leads to insufficient cooling of the graphics adapter. In this case, the thermal paste must be urgently replaced.

    Note: Disassembling the video adapter will void your warranty if it fails. Therefore, you should contact an official service center. If the warranty period is over, read the link below for a guide to replacing the thermal interface for a graphic card.

    Power saving mode

    All versions of Windows have a special service that turns off devices that are not currently in use. The purpose of this function is to save energy. By default, in the OS, the idle time is never less than 5 minutes if it is a stationary computer or laptop. But various erroneous manipulations by the user himself or by third-party programs can change this time to less.

    • We use the key combination “Win” “X” to open the properties window.
    • In the menu, click on “Power Management”.

    Next, select either the link “Setting the display to turn off” (1), or “Setting the power supply scheme” (2).

    In the line “Turn off the display”, change the time if necessary.

    • Use the key combination “Win” “X” to open the “Windows Mobility Center” window.
    • Selecting the power properties icon.

    In the window that appears, go further. “Setting the display to turn off”.

    We set the parameters we need to turn off the monitor.

    • Right click on the desktop.
    • Selecting “Properties”.

    Next, we move to the “Screensaver” tab.

    Set the desired parameters to turn off the display.

    Monitor malfunction

    If the monitor goes out during the operation of the system unit, it cannot be ruled out that there are some problems with it. Most monitors have protection that automatically shuts off the screen in the event of overheating. You cannot check the temperature of the monitor with the help of diagnostic tools, so the only option is to “feel” to determine if it is too hot. If the monitor overheats, you may need to place it in a more ventilated place in the room, or move it away from a wall, for example.

    Also, the monitor may turn off automatically if it is used in a damp room. In such a situation, you need to move the monitor to a room with normal humidity and let it stand for some time without being connected to the network. During this time, the settled moisture should evaporate, and during operation in a normal environment, the monitor will no longer go out, if corrosion has not had time to form.

    Monitor shuts down due to bad memory modules

    Another common problem that can cause the monitor to temporarily turn off is the failure of RAM or its work with errors. To make sure that this problem is absent or present, it is recommended to check the RAM using Windows tools or third-party applications. Even if one of several RAM modules is faulty, this can cause the monitor to turn off spontaneously while the system unit is operating.

    RAM modules are not repaired, and if, as a result of the check, problems were found in the operation of one or more of them, you will need to purchase new RAM strips in their place.

    The monitor goes out due to problems with the video card

    In the computer, the video card is responsible for displaying the image on the monitor. Its malfunctioning can be the reason why the monitor screen goes blank while the system unit is operating. You can verify that the problem is not related to the video card by connecting the computer to another monitor or, for example, to a TV. If the image is displayed on it without problems, then the option with a faulty video card can be swept away.

    Most often, a video card malfunction, which can lead to temporary interruptions in the output signal, is associated with overheating. The basic cooler of a video card is not always enough to cool the chip on it, especially if the video accelerator has been overclocked. Check the temperature of the video card using special applications, making sure that it is within acceptable limits.

    It is worth noting: If the problem with turning off the monitor when the system unit is operating is associated with overheating of the video card, it may appear, for example, only when running resource-intensive games or programs.

    Loss of signal due to faulty cable or connector

    The most common reason why the monitor turns off for a while while the computer is running is a faulty cable. In this case, you need to check the condition of the cable itself, through which information is transmitted from the computer to the monitor. Most often, a DVI or HDMI connector in a computer case is used to output an image. Make sure the cable is firmly plugged into it, if it is DVI, it must be tightened, otherwise the connection will not be reliable.

    If it is not possible to identify damage or poor connection of the cable, it is recommended to try using a different port for connection in the system unit, most often there are several such ports. Also try to get a cable with which there are definitely no problems, and connect the monitor to the system unit through it.

    What to do if the monitor turns off but the computer is running

    It is quite simple to connect the system unit to the monitor, for this you need to connect them with a cable through the appropriate port, after which the image will be broadcast on the screen. Despite the relative simplicity of the procedure, a number of problems may arise at once, even after a successful connection. If the monitor goes out while the computer is running, many users may complain that this is due to its malfunctioning. In fact, this is far from always the case, and below we will consider the main reasons why the monitor turns off while the system unit is running.

    Short circuits in the motherboard

    If the monitor goes out for any of the reasons described above, there is a great risk that there is a malfunction of the motherboard. This is the most serious problem as it will require replacing the motherboard to solve it.

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