The Monitor Goes Out, But The Computer Continues To Work

Why does the monitor screen go blank? The computer continues to work

The Monitor Goes Out, But The Computer Continues To Work

Hello! If your computer screen periodically goes out, although the system unit is turned on and for no good reason, you should not look for the reason that it goes out in the screen. On “a life” the screen is influenced by a huge number of factors, in which we will talk in our today’s material.

Factor one. Technical problems with the monitor itself.

If you find yourself in a situation where your computer screen periodically goes blank, then start diagnosing it from the most obvious places.

So, in order to make sure that the reason lies in the monitor itself, you need:

1) Turn off the computer.
2) Immediately after that, launch it and watch the screen.
If, after you started the computer, the screen immediately lit up, and then went out sharply, then the probable cause of the breakdown is the backlight lamps, which are installed in liquid crystal monitors. They may have burned out.
If the monitor darkens, and when the light from the lamp hits it, it becomes faded, then the reason lies in the voltage inverter.
In order to find out the specific reason for the breakdown of your monitor, you need to pull out the cable with which it connects to the system unit. In case the window with the inscription “No signal ”does not pop up, then you are NOT starting it alone. At best, the service will help, and at worst, you will have to fork out for a new monitor.

Factor two. Technical problems with the adapter.

In the event that any component in the system unit fails, the monitor notifies you about it. When you turn it on, the signal is intermittently interrupted.

If the problem lies in the adapter, then you need:

1) Disconnect the system unit from electricity.
2) After a couple of minutes, open your system unit.
3) Find the adapter inside. Move it a little side-to-side.
These actions should help. If this aLGorithm did not help you, then pull out your adapter and configure the computer to connect to the integrated adapter.

Factor three. dust blockages.

When was the last time you cleaned your system unit from dust? But this may be the reason for screen failures.
Dust blockages interfere with the proper functioning of computer components such as RAM and adapter. To get rid of this problem, you need a banal cleaning of the system unit.

It is recommended to use a portable USB vacuum cleaner or a soft brush for this.
Clean your computer from dust NOT less than once every six months, but we recommend doing it more often.

Factor Four. Cable Problems.

This factor is one of the most common, but it is not as easy to notice as you might think. With an external examination, you can probably think that the wire is quite “healthy”, but this is not always the case.

Everything is checked quite easily. you just need to find the same wire as the one that is connected to your screen and connect it. If everything worked, then the malfunction is eliminated!

Factor five. Incorrect wire connection.

In those system units that are not quite old, two types of adapters are usually installed. integrated and discrete. In the case when the wire is connected to the wrong socket, then the screen, although it will supply “signs of life”, but by itself it will not work.

The reason lies in the fact that the BIOS was originally programmed to give preference to a more efficient adapter. If someone mistakenly connected your monitor to the integrated adapter, then it may refuse to work.
The fix is ​​pretty simple too. Make sure the monitor is connected to Verona. If it is not, then reconnect it to the second adapter.

Factor six. Technical problems with the processor or motherboard.

If the reason lies in “mothers” or processor, then the cooler will work as before, saying that the computer is in working order, although in fact it is not.

This problem can only be solved in the service, but you should make sure if this is so. To do this, check if the red sensor under the mouse is on or if the keyboard is illuminated.

Factor Seven. Ordinary Life.

Even that screen, which may be fully operational, will stop working due to your own inaccuracy. It is possible that you simply pulled out the wire, which connects the monitor to electricity or the system unit, or simply pressed the shutdown button on the screen itself.
These malfunctions are solved quite simply, and perhaps it’s even ridiculous, but it’s better to make sure once again than sets for components.

card malfunction

Another logical prerequisite for constantly turning off the monitor screen may 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.)

Driver error messages appearing in the system tray.

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

discrete card

In most cases, the normal operating temperature of your graphics adapter is considered to be NOT over 60 degrees Celsius. But this is almost impossible to achieve on powerful 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 restarts.

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


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Run the GPU-Z program.

Go to the “Sensors” tab.

If you have a discrete card, then select it from the drop-down list. If not, then the integrated map will be specified by default.
In the line “GPU Temperature” you can see the current temperature of the map (2).

Launched 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.

Laptop design features

Some laptop manufacturers do not think about a reliable heat dissipation system already at the design stage of a certain model. In such cases, in portable 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 put any stand on the back (or in front) under the laptop, lifting it.

Laptop cooling grill

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

Portable Laptop Cooling Pad

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 adapter will void your warranty if it is NOT passed. Therefore, you should contact an authorized 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, OS downtime is never less than 5 minutes if it is a desktop or laptop computer. But various Erroneous manipulations by the user himself or by third-party programs can change this time to less.

Windows 8-10

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 off” (1), or “Setting the power supply scheme” (2).

In the line “Turn off the display” Changing the time if necessary.
Dialog box for changing monitor shutdown settings when idle in Windows 8

Using the key combination “Win” “X” calling the window “Windows Mobility Center”.
Selecting the power options 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.

Click on “Power”.

Set the desired parameters to turn off the display.

card driver

Improper operation of graphics drivers rarely causes the issues under consideration. But you should not completely exclude the influence of the conflict of drivers (or their absence) on the unstable operation of the display.

Boot the computer in “safe mode”.

Press “Win” “R”.
Next, enter “devmgmt.msc”.

Find the discrete card (if available) in the “adapters” section. No yellow exclamation mark next to the device name is required.

Using RMB, click on the name of the adapter, then select “Properties”.

Device Status should indicate normal operation.

Next, go to the “Resources” tab and make sure that there are no conflicts.

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

Go to the same device properties window, which was discussed above, but to the “Driver” tab.
Click the “Delete” button.

I confirm my decision.
Restart your computer normally.

This method is effective for problems with adapter drivers. Unfortunately, it doesn’t always bring results. In difficult cases, the user will be required to search and install the driver manually. How to do this, read the links below.

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


One of the most common reasons for the monitor to turn itself off is a malfunctioning RAM. 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 unsuitable for repair, so 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. The OS itself has a special tool.

To run RAM diagnostics using the Windows operating system itself, you must:

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 reboot, the diagnostic procedure will start, and upon completion, the test results will be displayed.

System settings

A very common prerequisite for turning off the monitor 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 time for the Turn off display setting. If yes, select “Never” from the dropdown list.

monitor defective

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 is working properly, the message “Vs signal” or “Cable is disconnected” should appear on the screen”, otherwise it will indicate a problem with the display itself. If possible, try connecting the monitor to a second PC.

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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 may 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 cards (it is recommended to disable one), problems with RAM (rare).

Incorrectly selected resolution

The fact that the monitor turns off during a game or just work is sometimes to blame for the incorrectly selected resolution. If, using third-party tools, 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 incorrectly selected resolutions is the message “Out of range”.

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

So, today we told you about the reasons for the extinction of the monitor screen during its operation. We advise you to double check all connections before bringing it in for repair. We hope that our today’s material helped you.
peace for everyone!

If the monitor turns off during operation.

There is no specific solution to this problem, since there may be several reasons why the monitor goes out. The most common reason is, of course, turning off the power consumption of the monitor when idle. If your monitor goes out, just when you are not working on it, and you DO NOT like it, then you need to do the following:

In Windows XP, right-click on the desktop and click Properties. In the window that appears, go to the “Screensaver” tab and press the “Power” button. The menu item “Disable the display” is responsible for turning off the monitor, you can specify the required time, or even refuse to disconnect.

In Windows 7 go to the “Start” menu, then “Control Panel”. “Power supply”. In the right column, click the menu “Display off settings” and in the window that opens, change the value “Disable display:” to its value.

If the monitor screen goes blank while working at the computer, then, as mentioned earlier, there may be several reasons.

Card driver conflict

Another reason the monitor turns off on the computer is a conflict in the card drivers. To check this, do the following:

  • Start. Control Panel. Device Manager (for convenience, you can select the “Large icons” view mode in the upper right corner).
  • In a new window, click on the “adapters” item, after which the name of your card will be displayed.
  • Right-click on it, select the “Properties” item and look at the state. If the card is functioning normally, then the new window will say so.
  • Next, select the “Resources” tab and read if there are conflicting devices.
  • If everything is in order, then I hide all windows. Then we press RMB on the desktop, select the item “Screen resolution” and select the minimum. for example, 800×600 pixels. Click “Apply” and restart your PC. If it turns on. congratulations, the problem is fixed.

Viruses and malware

You are probably asking yourself, “Why does this monitor go off and on. There is dust on the fans, I have NOT changed anything. I have the best antivirus, a friend gave me two years ago. What is this dirty trick.? !? “.

Oddly enough, but viruses may well become a prerequisite for the fact that the monitor screen goes blank. If your antivirus is free, then you should know that all free offer only basic protection.

Believe me, no one will update your antivirus database every hour for free. Whatever anyone tells you, such virtues are comments.

In no case 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 curing utilities. Doctor Web and AVZ. They should not conflict with the antivirus that you currently have installed. Ego does not need to be removed or disconnected.

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.

instead of conclusion

Well, I hope that one of THESE methods helped you solve the annoying problem. If the monitor screen still turns on and off, then it may be due to faulty hardware. In this case, you can look for other ways to solve this problem or immediately contact the service center. But it’s up to you to decide.

Faulty random access memory (RAM)

For this reason, the monitor goes out rather less often, but it does happen sometimes. You may have recently bought new RAM. Or was she just due.

If you have several RAM sticks, you can disable one. Or swap them. You can also check your RAM from a friend or take his OPG and connect it to yourself. If the problem is in her, you will immediately understand it.

Humidity is to blame

Another popular reason why the monitor turns off is humidity. Believe it or not, if a PC or laptop stands in a room with humid air for a long time, it causes malfunctions. As a result, the monitor turns on and off immediately. And all because condensation can accumulate in it, which, of course, will not give anything good.

What to do in a similar situation? Just leave the computer off for a while and let the water evaporate. This will solve the problem (if, of course, this is the case).

Tell your friends on social networks

card malfunction

Most often, the monitor turns on for 2 seconds and turns off due to a card malfunction. After all, it is she who is responsible for displaying the image on the screen. And the cord from the monitor is connected just to her.

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The most reliable way to make sure that the monitor is dying out precisely because of the card is to connect another one and try to turn on the computer. You can take her as your friends or acquaintances (if any).

The screen on the laptop or the monitor may be turning off due to the card overheating. The cooler (fan) is broken, the cooling system is NOT doing its job, etc. To verify this, turn off your computer and wait 20-30 minutes (more is possible). If the problem was overheating, then it should turn on normally. In this case, you will need to resolve the issue with the card cooling or its replacement.

Good to know: How to check the operation of the card on a computer?

Adapter problems

It is the card that is responsible for displaying the image on the computer display, which may well go out due to malfunctions associated with it. But first you need to check this assumption by connecting another monitor to the PC. Most modern televisions are suitable for THESE purposes. If everything works fine in this way, then the card is out of suspicion. Otherwise, you need to figure out why there are failures in its work.

the card may cause screen fading in case of overheating. Most often this happens during games, when it works at full capacity and emits a lot of heat, and the cooler simply does not have time to cool it. After a while, the computer itself may turn off. If this has not happened before, then the cooling system may not be able to work properly due to accumulated dust in the system unit.

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.

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 Corresponding 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.

monitor malfunction

If the monitor goes out during the operation of the system unit, it cannot be excluded that there are some problems with it. Most monitors have protection that automatically shuts off the screen when there is a danger of overheating. You will NOT be able to check the temperature of the monitor using 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 a while without being connected to the network. During this time, the settled moisture should evaporate, and when working in a normal environment, the monitor will no longer go out if corrosion has not had time to form.

The monitor goes blank due to problems with the card

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

Most often, a card malfunction, which can lead to temporary interruptions in the output signal, is associated with overheating. The basic cooler of a card is not always enough to cool the chip on it, especially if the accelerator has been overclocked. Check the temperature of the card using the dedicated apps, 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 related to the overheating of the 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 for image output. Make sure the cable is firmly inserted into it, if it is about 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 problems, and connect the monitor to the system unit through it.

Short circuits in the motherboard

If the monitor goes out for other than one of the reasons described above, there is a high 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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