The monitor turns off but the computer continues to work. The monitor turns off when Windows starts or during the game: what to do? Monitor turns off due to bad memory modules

If the screen turns off intermittently while using the computer, then 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.

Always-on display problems 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 by studying this article.

Reason 1: Monitor failure

If the monitor turns off while the system unit is running, 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 device temperature cannot be checked. Therefore, here we can only advise you to check it by touch. If the display case is too hot, place it away from a wall or somewhere with better air circulation.

Excessive humidity is one of the reasons why the display turns off intermittently. 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 had time to form, then after the evaporation of all moisture, the device should return to normal functioning.

Disconnect the output device from the system unit. On the screen, you should see an inscription like “No signal” or “No connection”. If there is no such message, then you need to contact the service center.

To remove the monitor from the circle of potential causes of the problem, you just need to connect another output device to a stationary PC or laptop. If the image is still missing, then the fault lies with the video card or cable.

Reason 2: Cable defect

The most common reason for an output device to turn off intermittently is a damaged cable. The most commonly used connectors for screen output are DVI, HDMI. But the VGA format is still found. Make sure that the inserted cable is held securely and 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, just replace the cable.
• If changing the cable does not solve the problem, then the problem is with the monitor itself.
• If the problem goes away after connecting to another computer, then the problem is neither with the display nor with the cable. In this case, the cause should be sought in the depths of the system unit.

Reason 3: Video card failure

Another logical reason for constantly turning off the monitor screen may be a hardware failure of the graphics adapter. Such cases are characterized by the following:

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

Reason 4: Video card overheating

In all modern PCs (including laptops), motherboards have two graphics adapters at once: internal and external. In the default BIOS 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.

In most cases normal operating temperature graphics adapter is considered to be one that does not exceed 60 degrees Celsius. But on powerful video cards, this is almost impossible to achieve. The maximum peak (100% load) is usually set 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 that, the graphics module of the board reduces the frequency for cooling purposes. But such a measure may not work and then the PC restarts.

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

Method 1: GPU-Z

Method 2: Speccy

Consider the main reasons leading to insufficient cooling of the graphics adapter.

Dust

If the PC has not been cleaned of dust for a long time, 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 normally. Dirt and dust on the card's cooler itself can cause it to stop in severe cases. Dust removal 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.

Design features of the laptop

Some laptop manufacturers already at the design stage of a certain model do not think over a reliable heat dissipation system. In such cases, laptop computers there are, 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 on the back (or front) under the laptop, lifting it up.

Alternatively, you can use special cooling pads for laptops. They allow you to more intensively drive air through the computer. There are models powered by USB, as well as having 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 immediately.

Note: Disassembling the video adapter will void the warranty if it is not covered. Therefore, you should contact the official service center. If the warranty period is over, read the link below for a guide to replacing the thermal interface for a graphics card.

Reason 5: Power saving mode

In the Windows operating system of all versions, there is a special service that disables currently unused devices. The purpose of this feature is to save energy. By default, the idle time in the OS is never less than 5 minutes if it is a desktop computer or a laptop. But various erroneous manipulations of the user himself or third party programs can change this time to a shorter one.

Windows 8-10

Windows 7

Windows XP

Reason 6: Video card driver

Incorrect operation of graphics adapter drivers does not often lead to the problems considered. But to completely exclude the impact of a driver conflict (or lack thereof) on unstable job display is not worth it.

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

Read more: How to login Safe mode» via BIOS, on Windows 10, Windows 8, Windows XP

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



4. We find a discrete card (if any) in the section "Video adapters". No yellow badges exclamation mark next to the device name should not be.



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



6. In field "Device Status" normal operation should be specified.



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

If the device is displayed with problems (presence of additional icons, resource conflicts, etc.), then the adapter driver should be uninstalled. To do this, 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 for and install the driver manually. For information on how to do this, read the links below.

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

Reason 7: RAM

One of the most common reasons for a monitor to turn itself off is a malfunction. random access memory. To detect such problems, there are special tools for checking RAM for errors. Even if a malfunction occurs in a single module, this is enough to periodically turn off the monitor while the PC is running.

RAM modules are unrepairable, so if you find problems in their work, you should purchase new ones.

Method 2: System tool RAM checks

Another way to check the 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, in order to determine the cause of the inoperability of the monitor, the user will need to perform a number of steps. Some of these activities are related to simple and effective diagnosis by exclusion. For example, hardware problems related to the display and cable are so easily identified. Software methods require a sufficiently long time, but they cannot be dispensed with to exclude a malfunction of the RAM.

Every PC user sooner or later faces 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 the PC to working capacity. The following will describe cases in which the monitor turns on for 2 seconds and goes out. Why is it so? What to do with such a phenomenon? Can the user solve the problem on their own? All this will be discussed later. In fact, not everything is as scary as it seems!

Various manifestations

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

If the monitor turns off, then the following behaviors of the device are possible:

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

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

PC connection

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

Checking the insides

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

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

• capacitors;
• circuit breakers;
• backlight lamps;
• impulsive 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 it in service center. It is not recommended for beginners to repair monitors.

Dim image

But that's not all. The proposed scenarios for the development of events are relevant for situations where re-enabling The PC monitor refuses to show signs of life at all. But, as already mentioned, other situations are 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 blown fuses or damaged backlights. As already mentioned, it is best to take the monitor to repair. In service centers for a small fee will help to correct the situation.

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

Wear

Does the monitor turn on for 2 seconds and then turn off? LG or any other manufacturer is not so important. The main thing is that the main causes of problems and how to fix them always remain the same.

Sometimes this phenomenon occurs due to the banal wear of the device. Any technique has its own warranty period. After its completion, one should not be surprised at failures, malfunctions and failures of devices to perform their functions. That is, the monitor can simply "die of old age." This is normal. It is easy to guess that such a layout is relevant mainly for old devices.

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

Control buttons

Does the monitor turn on for 2 seconds and then turn off? Samsung or any other - it doesn't matter which company created the device. On some device models, a monitor is provided. Sometimes the reason lies in them.

For example, damage to button data. Some users say that at the slightest crack in the monitor's power controls, the component spontaneously turns on and off. This is caused by vibration, which simply activates the "Off" mode on the monitor.

You can fix the situation in several ways:

1. Soldering the contacts of the buttons on the monitor. It is recommended to contact specialists for this.
2. Monitor replacement. Extremely effective, but radical option.
3. Fixing buttons. Usually the procedure is to replace them.

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

video card

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

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 turn off? If there is a possibility of incompatibility with the computer hardware (for example, an old video card and a new screen or vice versa), the only right decision is to fix the problem. The user will either have to change the monitor, or look for an incompatible computer part and replace it.

Boards

Only a professional will be able to notice the following alignment on their own. Does the monitor turn on for 2 seconds and then turn off? LG, for example, often suffer from damaged circuit boards. If these components of the monitor are damaged or soldered poorly, the screen will not work properly.

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

As a rule, damaged boards are not repaired. Masters recommend simply buying a new monitor and not thinking about a problematic device. You can solder and even replace the boards, but it is unlikely that after such actions the device will work normally for a long time.

Findings and Conclusions

Now it is clear why the monitor turns on for 2 seconds and goes out. ViewSonic or any other is not so important. Often, the production of the monitor does not play any role in the causes of the appearance of certain malfunctions in the device.

With confidence, we can talk about the need to completely replace the device or repair its insides if:

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

• check the compatibility of the PC with the monitor;
• make sure 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 how to act if the monitor turns on for 2 seconds and goes out. This situation should not cause panic. Often the problem can be solved in a few minutes.

If none of the options helped, it is better to take the monitor to a service center. There, as already mentioned, they will help diagnose the cause of the breakdown, after which they will fix it. It may be time to replace the monitor. The master in the service center will be able to point this out.

There are various factors that cause the LCD monitor screen to turn off by itself 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 turning on, after a second, after a few seconds, constantly or intermittently.

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

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

For this reason, most of the solutions that are faced with problems generated by components that directly or indirectly affect correct work monitor.

It is very important, before applying the instructions below, to check the documents and the computer to see if the warranty period is still 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.

After a certain amount of time, the monitor goes blank and turns off.

1. Try connecting your monitor to another computer (where possible) to see if it works.
2. Turn off the system, disconnect the power supply, open the cover with right side(when viewed from the front) and check that the fans are clean and not blocked.
3. Use good security software that always installs Latest updates, analyzes the system in search of 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, but be careful with it.

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

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

Monitor keeps dimming in games

There isn't much to describe here. Better to just explain the process. If the monitor spontaneously goes out in games, then this is a direct indication of a weak video card.

Most of all, games create the load, 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, resulting in a dark screen or the monitor simply goes out.

What can be done? Check the temperature during the game, for example, Sometimes there is only one way out - to replace the video card with a more powerful one.

You can also update the driver if it came out more a new version. The description above is certainly not the final verdict - there may be other reasons.

Monitor does not turn on after computer is turned on

1. Make sure the graphics card is properly connected to the motherboard.
2. Check if your existing graphics card is compatible with other components in your computer (check the manufacturer's website for information).
3. If you recently added new hardware, disable it for a while.
4. Try the video card from another computer to be sure that the problem is not in it.

The monitor goes out intermittently due to overheating of the component

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

Dust and fluff accumulated on the fan blades, grille and components for a long time, do not allow you to receive system unit proper ventilation.

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

Monitor on boot turns off or goes blank due to damaged components

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

It is very important that there is enough food. Replacement computer component This is not a light bulb replacement!

Insufficient power supply will cause the computer to suddenly shut down or the monitor to go blank.

When replacing the video card, hard drive or any other component, you must ensure that the existing source is capable of supplying sufficient nutritional requirements.

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

Viruses and malware

You are probably asking yourself "why does this monitor dim and turn off?!? There is no dust on the fans, I didn't change anything... I have best antivirus that a friend gave me two years ago. What kind of abomination is this...? !?”.

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

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

In no way am I encouraging you to switch to a paid antivirus program. No matter how super-duper she is, viruses of a lonely person can miss.

Hackers are always one step ahead. More specifically, you need to scan your computer with at least two antivirus programs created by various manufacturers.

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 detailed description the essence of the problem. Good luck.

I purchased my 22-inch monitor back in 2008, 8 years have passed and some components could fail due to high temperatures inside the monitor, especially considering that a rather high temperature is reached in the area of ​​​​the power supply board, which also negatively affects the life of electrical components.

It took me no more than 20 minutes to restore the monitor's performance, and in this article I will tell you step by step steps for self-repair.

I am sure you have heard the concept of “swollen” capacitors, this is the most common cause of failure of motherboards and computer power supplies, but LCD monitor power supply boards are no exception, which convert incoming 220 volts to 5 volts to power electrical circuits and 14 and more volts for the operation of the matrix and the backlight inverter.

If your monitor is not new and you admit the possibility of failure of the capacitors in the power supply, you need to inspect them appearance, for this you need to disassemble the monitor, as a rule, there is a metal box inside, and under it there are two boards, one power supply (where the 220 volt cord is inserted), and the second board is the low-voltage part itself, which is responsible for the operation and control of the monitor.

If you have a multimeter at hand, then turn on the disassembled monitor and measure the voltage at the output of the power supply, usually voltages are written next to the terminals, which should be on a working monitor. In my case, I observed a voltage of 4.3 volts instead of the prescribed 5 volts, which already hinted at problems in the power supply.

Upon a cursory examination, 4 swollen capacitors immediately caught my eye, their parameters are 680 microfarads per 25 volts, I didn’t have any similar in size and capacity at hand, so I quickly packed up and went to the radio parts store.

The most important thing when buying new capacitors is to consider capacitance, voltage and dimensions. I decided to change all six capacitors and bought with a margin ten capacitors with a capacity of 1000 microfarads, for a voltage of 25 volts, the dimensions were identical to the old ones at 680 microfarads. You ask why I put in higher capacitance capacitors?

The fact is that in the output stages of the power supply, electrolytic capacitors play the role of smoothing impulse voltage and by increasing the nominal capacitance by 50-100% you get a smoother voltage and a capacitance margin.

Next, I soldered all the old capacitors and soldered in new ones. I want to draw your attention to the fact that electrolytic capacitors have polarity, i.e. it doesn't matter how you solder them. Usually on printed circuit board there are negative contact markings, also on the capacitor itself there is a negative terminal designation, so be careful, your task is to solder new capacitors strictly observing the polarity.

After we soldered new capacitors and made sure that there are no closed tracks after working with a soldering iron, we turn on the monitor in the network. The LED came on and didn't blink. those. I already understood that the monitor was working, but to make sure I measured output voltage, as you can see, it already amounted to the required 5 volts. After I connected the wires, made sure that the monitor was working and no longer turned off on its own, and assembled everything in the reverse order.

And finally, I want to give the measurement data of the capacitance of soldered capacitors. Let me remind you that a total of six electrolytes were replaced, four of which had obvious signs of “bloating”, their upper side was not flat and rounded. So, in order for you to understand what a swollen capacitor is, I will give the following measurement results: capacitance of faulty capacitors ranged from 16 to 90 microfarads, instead of the nominal 680 microfarads.

Thus, it is safe to say that in my case, the external sign of a slight swelling of the capacitors was the result of a loss of capacity of more than 90%, which led to an unstable low voltage, which prevented the monitor backlight inverter from starting, which is why the monitor turned on and immediately turned off due to fault voltage drops. If you have any questions, you can ask them in the comments below this article.

Hi all. What to do if the monitor turns on and immediately goes out? Today I had a monitor for repair with such a problem that even a novice radio amateur can solve. But first things first.

So, a Samsung monitor, namely Samsung SyncMaster 940nw. The malfunction was that a picture appeared on the screen for a short time, for about 1-2 seconds, after which the monitor immediately went out.

This monitor uses what is called fluorescent CCFL backlight. In simple terms, this is a backlight in the form of llamas, similar to lamps. daylight, only reduced tenfold. Lights these lamps, a special inverter that supplies high voltage on their cathodes, which causes the glow of these lamps. Most inverters have a fault protection that is activated if any of the lamps fail, the inverter itself breaks down, or there is insufficient power supplied to it. For ordinary user, the protection operation looks like this: the monitor turned on, at this moment the inverter analyzes whether everything is normal with the backlight, and if it finds a breakdown, it immediately turns off the backlight. This is what we see in our example. It remains only to find out what includes this very protection of the inverter.

Disassembly of this monitor is quite easy. First, unscrew the stand, which is mounted on 3 bolts. Everything else is held on by clips. To remove the frame, we drive some object between the body and the frame itself (I use a common card from the bank), and draw it along the perimeter of the frame, snapping off the latches.

Control buttons are installed on the frame, from which you need to carefully disconnect the cable that goes to motherboard. Putting something soft on the table, put the monitor face down. On the left, we snap off the protective cover, and we get to the loops for connecting backlight lamps.

Monitor backlight connectors

As you can see from the image, this monitor uses four monitor backlights. Disconnect the lamps from the board. Now you can carefully lift the boards from the matrix. Next, we see a cable connected to the matrix, which, by pressing the latches on the sides, must be disconnected.

After that, the matrix can be put aside, and repair the boards.

The power supply is held on by 3 bolts, by unscrewing which, you can remove the board. Having removed the board, you can immediately see the cause of the monitor malfunction. It lies in three swollen electrolytic capacitors.

This is very frequent breakdown monitor data, the repair of which takes no more than 15 minutes. The swollen capacitors were nominal: 2 capacitors 820 uf and one 470 at 25 volts. I replaced them with two capacitors of 1000 microfarads each and one with the same one as it was 470 at 25v.

Reassembling the monitor in reverse order, everything worked.

I hope this article will be useful for you. Thank you for your attention.