Why does the computer screen turn off while working? The monitor turns off when you turn on the computer: an interesting case in my practice

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

Problems with the display constantly turning off are among the most difficult. Carry out diagnostics and identify the cause at home ordinary user very problematic. Such violations are associated either with hardware or with software malfunctions. The former, as a rule, require contacting a service center, and the latter you can learn to identify by studying this article.

Reason 1: Monitor malfunction

If the monitor turns off while the system unit, then problems with the main output device cannot be ruled out. Most monitors have protection that is triggered automatically when overheating occurs. But standard means It will not be possible to check the temperature of the device. Therefore, here we can only advise you to check it by touch. If the display case is too hot, it should be placed away from the wall or in another location with better air circulation.

High humidity levels are one of the reasons why the display turns off periodically. Move the monitor to a room where there is no high humidity and let it stand for a while. The monitor should not be connected to the network. And if corrosion has not yet formed, then after all the moisture has evaporated, the device should return to normal operation.

Disconnect the output device from the system unit. You should see something like “No Signal” or “No Connection” on the screen. If there is no such message, then you need to contact the service center.

To remove the monitor from the range of potential causes of the problem, you simply need to connect another output device to your desktop PC or laptop. If there is still no image, then the fault lies with the video card or cable.

Reason 2: Cable defect

The most common reason for an output device to periodically turn off is cable damage. The most common connectors used for screen output are DVI type,HDMI. But the VGA format is still available. Make sure that the inserted cable is held securely and is twisted on both sides (DVI).

• First you need to try connecting the display to another computer using the existing cable. If there is no change, simply replace the cable.
• If changing the cable does not solve the problem, then the problem is in the monitor itself.
• If the problem disappears after connecting to another computer, then the problem has nothing to do with the display or the cable. In this case, you should look for the cause in the depths of the system unit.

Reason 3: Video card malfunction

Another logical reason for the monitor screen to constantly turn off could be hardware failure graphics adapter. The following is typical for such cases:

For information on what to do in such cases, see the link below:

Reason 4: Video card overheating

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

Normal in most cases operating temperature The graphics adapter is considered to be one that does not exceed 60 degrees Celsius. But it’s almost impossible to achieve this on powerful video cards. The maximum peak (100% load) is usually determined at 85 degrees. For individual GPUs, the peak maximum reaches 95 degrees.

For almost all existing GPUs, the maximum allowed upper limit is 105 degrees. After this, the graphics module of the board reduces the frequency for cooling purposes. But such a measure may not produce results and then the PC reboots.

The first step is to make sure that the video card is not being cooled properly. For this purpose there are, for example, software temperature monitoring. Let's look at two of them.

Method 1: GPU-Z

Method 2: Speccy

Let's look at the main reasons leading to insufficient cooling of the graphics adapter.

Dust

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

Design features of the laptop

Some laptop manufacturers are already at the design stage a certain model They don’t think through a reliable heat removal system. In such cases, laptop 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 to place any stand behind (or in front) under the laptop, lifting it up.

Alternatively, you can use special cooling pads for laptop PCs. They allow air to be forced more intensely through the computer. There are models that run on USB 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 replaced urgently.

Note: Disassembling the video adapter will void the warranty if it does not pass. Therefore, you should contact an official service center. If warranty period already behind us, read the link below for a guide on replacing the thermal interface for a graphics card.

Reason 5: Power Saving Mode

In all versions of the Windows operating system, there is a special service that disables 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 below 5 minutes if it is desktop computer or laptop. But various erroneous manipulations of the user himself or third party programs may change this time to less.

Windows 8-10

Windows 7

Windows XP

Reason 6: Video card driver

Incorrect operation of graphics adapter drivers does not often lead to these problems. But completely exclude the influence of driver conflicts (or lack thereof) on unstable work The display is not worth it.

1. We boot the computer into "Safe Mode".

Read more: How to enter “Safe Mode”, on,

2. Click "Win" + "R".
3. Next we enter "devmgmt.msc".



4. We find discrete card(if available) in the section "Video adapters". No yellow icons with exclamation point should not be next to the device name.



5. Using RMB, click on the name of the adapter, then select "Properties".



6. In the field "Device Status" normal operation must be indicated.



7. Next, go to the tab "Resources" and make sure there are no conflicts.

If the device appears with problems (presence of additional icons, resource conflicts, etc.), then the adapter driver should be removed. To do this we do the following:

This method is effective for problems with video adapter drivers. But unfortunately, it does not always bring results. IN difficult cases The user will be required to search and install the driver manually. Read about how to do this using the links below.

Tip: First of all, you should find and install drivers for the motherboard (if you do not have them installed), then all the others. This is especially true for laptop owners.

Reason 7: RAM

One of the most common reasons why a monitor turns itself off is a malfunction RAM. To detect such problems there are special means RAM checks for mistakes. Even if a fault occurs in a single module, this is enough to periodically turn off the monitor while the PC is running.

RAM modules are not suitable for repair, so if problems are detected in their operation, you should purchase new ones.

Method 2: System remedy RAM checks

Another method for checking RAM does not require additional software. The OS itself has a special tool.

To run RAM diagnostics using the operating system itself Windows systems necessary:

Thus, to determine the reason for the monitor's inoperability, the user will be required to follow a number of steps. Some of these activities relate to simple and effective diagnosis by exclusion. For example, hardware problems related to the display and cable are easily identified. Software methods require quite a long time, but you cannot do without them to eliminate RAM malfunction.

Since the days of cathode ray tube monitors, the screen has been provided for automatically turning off after some time of system inactivity. This was necessary so that the kinescope phosphor would not burn out under the influence of electrons. LCD monitors are not in danger of burning out, but the screen turns off to save energy.

You can change the screen blanking time yourself. Right click on free space desktop and select the "Properties" command in context menu. Go to the "Screen Saver" tab and click "Power" in the "Energy Saving" section. In the “Display off” drop-down list, specify the amount of inactivity after which the monitor will turn off.

Technical problems

If the monitor turns off during heavy gaming or when working with 3D graphics, there may be a problem with the video card, especially if small artifacts appear on the screen, such as dead pixels. Disconnect the system unit from the power supply, remove sidebar and carefully remove the video card from the slot. If the card has a fan, use a vacuum cleaner to blow it out. Wipe the video card contact connector with an eraser to remove oxides. Carefully insert the card into the slot and check the operation of the monitor.

Try replacing the interface cable from the monitor to the system unit - its malfunction can also cause shutdowns. Insert the cable tightly as poor connections may cause problems. Connect the monitor to the system unit only when the power is turned off.

Modern video cards consume a lot of electricity. Your power supply may not be able to handle the load, especially if it is older than 3 years. Replace the power supply with a more powerful one or check the operation of the video card on another computer with a obviously more powerful one. powerful block nutrition. Using Everest or a similar program, look at the temperature of the components inside the system unit - perhaps shutdowns occur due to overheating.

Download from the video card manufacturer's website new driver and install. If the disconnections continue, connect the monitor to another computer to determine the source of the problems.

If the screen fades, try turning the monitor power on and off several times. Power button. If the image appears, there may be a problem in the power circuit - usually a dry or swollen capacitor. This technique will not help if the backlight lamps or monitor matrix are faulty.

A laptop user may encounter the following problem: the screen goes blank under various circumstances. Why by itself when the power is turned on, and after a certain period of operation? There are four common reasons that cause this phenomenon. It is important to note that when this phenomenon occurs, the screen does not always stop displaying information. If you shine a flashlight on it, you can see the picture. However, it remains so dark that the screen appears to be turned off.

Power problems

One of the reasons why a computer turns off by itself is incorrect settings power supply To configure, follow the following algorithm:

• open the control panel;
• Click on the “Hardware and Sound” tab;
• open "Power Options".

This section identifies possible power management schemes, including the current one. By default, this is the "Balanced" scheme. Enter it and look in the settings for the time that is set to the “dim display” function.

This setting improves energy efficiency by dimming the screen after a specified period of time when no keys are pressed or the PC mouse is not moved. If the screen goes blank, select a different power mode that does not offer screen dimming when the device is idle.

Try the combination function keys to enable . Each laptop manufacturer has its own, you will find it in the instructions. Look for a combination that turns the screen off and on. If the work field becomes dark, press this combination once or twice. In some cases this technique helps.

To do this you need:

1. De-energize the laptop by turning off the power and removing the battery.
2. Unscrew all bolts on the rear panel.
3. Remove the back wall, working carefully. It should open without effort.
4. Use cotton swabs to remove any noticeable accumulations of dust from visible parts.
5. Replace the device cover and return the battery.

Dust interferes with the quality cooling of the laptop

If the screen on your laptop still flickers, more high-quality cleaning can be entrusted to professionals. At independent work It is important to remember that the bolts on the cover may also be under the rubber “feet”, and the cover itself may not open, but move to the side.

Reinstalling drivers

If so, first you need to check your video card drivers. Software errors lead to different types problems: the screen may flicker, darken and even turn off the image completely. In some situations, colors become extremely dull. Diagnosis and reinstallation of drivers is simple and important step to fix the problem.

To find suitable software, you should visit the official website of your PC manufacturer. Running software downloaded from various free resources can cause great harm to the operating system. After downloading, installation is carried out according to the recommendations that the installer will sequentially issue.

BIOS problems

If dark screen occurred on the laptop after installing BIOS updates, then the system needs to be rolled back to the previous version. That is why before updating you need to do backup copy all data. Manufacturers of this type of PC regularly create system updates that need to be monitored.

If you did not update, then the problem that the computer starts and immediately turns off may be due to its absence. Errors may be caused by the fact that you installed new hardware or old version problems appeared. It is important to remember that if you update the BIOS yourself, you risk damaging the motherboard and voiding your service warranty.

When updating, remember that you need reliable information about the version of this program you have, as well as accurate information about the motherboard model. The information in PC documents is not always accurate, and there are special programs to check the type of equipment.

Can viruses cause the problem?

Despite the fact that the varieties virus programs you can't count it, the probability that the monitor turns off and the computer continues to work is very small. This is more likely an indication of a hardware problem or failure software. And yet, indirectly, damage to the settings can cause this phenomenon.

Therefore, you need to check for viruses step by step in three modes:

1. Standard.
2. When turned on.
3. In a safe place.

If there is no result, then you will probably find a certain amount malware and make your PC more stable. However, viruses are characterized by the following phenomenon: the computer turns on and off immediately. To resolve this glitch, you will need to log into the OS in safe mode and run a scan with a reliable, high-quality antivirus.

What to do if none of the checks helped?

If the monitor screen goes blank, the computer continues to work or turns off, and none of the above methods helped, you need to evaluate the quality Windows operation. Sometimes serious OS problems lead to the most unexpected problems. To turn on the laptop if the screen is black, you should find installation disk or a flash drive and connect it to the device.

Work from the selected media. Although this will limit your options, you will be able to see that the problem goes away. Then you need to reinstall operating system. If with removable media The computer turns off immediately after turning it on, then the problem is not in the software.

WATCH THE VIDEO

Make a schedule for turning off and turning on. If the monitor turns off, but the system unit is working, it is important to find a pattern in the time the screen turns off. Even if this does not give you an idea about the cause of the problem, the information will be useful to the service staff.

Every PC user sooner or later encounters a variety of computer failures and problems that interfere with comfortable work with the gadget. If you know how to behave in a given situation, you can quickly return your PC to functionality. Next we will talk about cases in which the monitor turns on for 2 seconds and goes off. Why does this happen? What to do in case of such a phenomenon? Can the user solve the problem themselves? All this will be discussed further below. In fact, not everything is as scary as it seems!

Various manifestations

The first thing you need to pay attention to is exactly how the computer and its components behave. Does the monitor turn on for 2 seconds and then go off? What happens to the PC? Is it still working? Or does the machine turn off completely? By answering these questions, you can eliminate about half of the various causes of failure.

If the monitor turns off, the following options for device behavior are possible:

• the screen stops working a few seconds after turning it on;
• refusal to work after some time;
• instant shutdown of the component (goes off immediately);
• is happening complete shutdown, after the next start of the PC, functionality does not return;
• the picture on the monitor does not completely disappear, it is visible, but very poorly.

It is important to understand that in some cases such behavior can be corrected on your own, but sometimes you will need the help of professionals. Why might such failures occur? How to fix them?

Computer connection

Does the monitor turn on for 2 seconds and then go off? The reasons for this phenomenon are varied. The first thing you need to do is make sure that the device is connected to the computer correctly.

Checking the insides

What's next? Does the monitor still turn on for 2 seconds and then go off? Are the capacitors intact? By answering this question, you can understand the causes of the problem. The point is that if reconnecting the monitor does not help, you will have to check the integrity of the device components.

Most often, for various reasons (overheating, power surge, wear), the following suffer:

• capacitors;
• fuses;
• backlight lamps;
• impulse transformer;
• power transistors BI.

If their serviceability is confirmed, it is necessary to pay attention to some other reasons for this behavior. Otherwise, you will have to repair the faulty component. It's best to do this in service center. It is not recommended for beginners to repair monitors.

Dim picture

But that's not all. The proposed options for the development of events are relevant for situations where, restart The PC monitor refuses to show any signs of life at all. But, as already mentioned, other situations are also possible.

What should I do if the monitor turns on for 2 seconds and the backlight goes out? Or, for example, the user can see his desktop, after which the image fades?

The cause of the breakdown is either burnt fuses or damaged backlight bulbs. As already mentioned, it is best to take the monitor to be repaired. Service centers will help you correct the situation for a small fee.

If you have the desire and at least some skills to repair complex mechanisms, you can try to replace the lamps and fuses yourself. After correct actions, the monitor will work again.

Wear

Does the monitor turn on for 2 seconds and then go off? LG or any other manufacturer - it doesn't matter that much. The main thing is that the main causes of problems and methods for eliminating them always remain the same.

Sometimes this phenomenon occurs due to simple wear and tear of the device. Any equipment has its own warranty period. After its completion, you should not be surprised by failures, malfunctions and refusals of devices to perform their functions. That is, the monitor may simply “die of old age.” This is normal. It’s not hard to guess that this arrangement is relevant mainly for older devices.

What to do? Best buy new monitor. It will 100% work fine for a long time. Devices that are already worn out, even after repair, either will not cope with their tasks, or they will quickly fail.

Control buttons

Does the monitor turn on for 2 seconds and then go off? Samsung or any other - it is not so important which company created the device. Some device models are equipped with a monitor. Sometimes the reason lies in them.

For example, damage to these buttons. Some users report that even the slightest crack in the monitor's power controls causes spontaneous switching on and turning off the component. This is caused by vibration, which simply activates the "Off" mode on the monitor.

There are several ways to correct the situation:

1. Soldering the contacts of the buttons on the monitor. It is recommended to contact specialists for this.
2. Replacing the monitor. An extremely effective, but radical option.
3. Repairing buttons. Usually the procedure boils down to replacing them.

Accordingly, there are a lot of options. It is difficult to predict why the monitor turns on for 2 seconds and then turns off.

Video card

Also, a similar phenomenon can be caused by incompatibility of computer components with the screen. This is a normal phenomenon, and in practice it does not occur too often.

The most common case is the incompatibility of the video card with the monitor. It is enough to connect the screen to another PC to make sure that the component is working - it will perform its functions normally.

Does the monitor turn on for 2 seconds and then go off? If there is a possibility of incompatibility with computer hardware (for example, an old video card and new screen or vice versa), the only correct solution is to eliminate the problem. The user will have to either change the monitor or look for an incompatible computer part and replace it.

Boards

Only a professional can independently notice the following alignment. Does the monitor turn on for 2 seconds and then go off? LG, for example, often suffers from damaged boards. If these components of the monitor are damaged or poorly soldered, the screen will not work properly.

It follows that failure of the monitor to work is not just a breakdown. This phenomenon may be caused by improper soldering of the boards or their damage. For correct diagnosis, it is best to take the screen to a service center.

As a rule, damaged boards are not repaired. Experts recommend just buying a new monitor and not thinking about the problematic device. It is possible to resolder and even replace the boards, but it is unlikely that after such actions the device will work normally for a long time.

Conclusions and Conclusions

Now it’s clear why the monitor turns on for 2 seconds and goes off. ViewSonic or any other - it doesn't matter. Often, the production of the monitor does not play any role in the reasons for the occurrence of certain malfunctions in the operation of the device.

We can confidently talk about the need complete replacement device or repairing its internals if:

• there was a strong power surge;
• the monitor has served the user for a long time;
• When disassembling the device, you can notice obvious damage to its components.

• check the compatibility of the PC with the monitor;
• make sure that the devices are connected correctly;
• check that all sockets and connectors are not damaged or broken.

All the suggested methods really help. From now on it is clear what to do if the monitor turns on for 2 seconds and goes off. This situation should not cause panic. Often the problem can be solved in a few minutes.

If none of the options help, it is better to take the monitor to a service center. There, as already mentioned, they will help diagnose the cause of the breakdown, and then fix it. It may be time to replace your monitor. The technician at the service center will be able to point this out.