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The monitor does not show an image; the computer is working. No power to the monitor. Incompatible video card driver

Today, most people use a computer for both work and leisure. But, like any other type of equipment, a PC can fail. Most often, the failure is only partial and affects only one of the devices. One of the most popular situations is when the monitor is silent when you turn on the computer. This problem is often discussed on computer forums. The first thing you need to understand is that either the monitor itself is broken, or the system unit may be the cause of the malfunction.

The block consists of many devices that are responsible for displaying the image on the monitor. And when a breakdown occurs with these components, the image quality will deteriorate or will not be displayed on the monitor at all. The user in such a situation will immediately think that the problem is in the screen, and perhaps even buy a new one, and this will be a waste of money. First you need to figure out the reason for the loss of the image, find out why the screen is not showing, and only then take action. Most of these problems can be solved with your own hands and even without specific knowledge.

The most common reasons why the monitor does not turn on are:

  • Lack of electrical power;
  • Problems with the connecting cord;
  • Incorrect image settings;
  • Problems with video adapter drivers;
  • Video card failure;
  • Motherboard malfunction;
  • Unstable operation of the operating system;
  • Incorrect BIOS settings;
  • Monitor failure;

Despite its simplicity, this is a very common problem. An unconnected cable may not be noticed, especially if a person is in a hurry and panicking. You can also accidentally touch the plug and disconnect the cord from the outlet or monitor. Children and even pets can do this.

Such a funny problem is very easy to solve and identify. If the power is connected, you can see a glowing indicator of a certain color on the monitor (depending on the type of screen). If it does not light, then check the connection. You need to remove the plug from the socket, see if there is any dust or other debris on it, and insert it back. The same manipulation must be performed with the cord on the side connecting to the display.

If the indicator starts to light up and the screen works, then the problem is solved and you can start using the computer with relief. If the light appears, but the screen does not turn on, or even the light does not appear, then the problem is different, and it is worth looking for its cause further.

Incorrect connection or faulty cable

You need to check whether the cable is connected to exactly the input that is required. This is true if you have an integrated and floppy video card. The monitor, in this case, is connected to a discrete one, the connector of which is located below.

You also need to check whether the cable is inserted correctly, both into the monitor and into the system unit. It needs to be removed and inserted back with the correct side. It may also be that the cable is simply faulty. You can check this using a working cord. If this is really the reason, then you need to go shopping. The cable is inexpensive, and there is no point in repairing it.

Problems with settings

If the system unit turns on but the screen does not, then the settings may also become a problem. This happens when the user configures a monitor resolution that is not supported. The refresh rate can also cause problems. Some monitors reset such incorrect settings on their own, and some simply refuse to work after this.

You can fix this yourself without spending a lot of time. You need to start your PC in safe mode. If in this mode the monitor shows, then we begin system recovery or reset.
To do this, go to the “Start” menu and click on “System Restore”.

Driver problems

Here, again you need to go through safe mode and reset the faulty driver. You need to go to the “Task Manager” menu and look at the properties of the video card driver.

There, click on the “Driver” tab and the “Roll Back” button. If this is not possible, then you just need to delete it.

If after this the monitor turns on, and the user sees a low-quality picture, then the problem can be solved by installing the latest driver for the video card.

Broken or incorrectly connected video card

The video card may be responsible for the fact that the system unit starts, but there is no image on the screen. And the reason may lie not only in the drivers. It is possible that the video card itself was touched during cleaning, or was placed back incorrectly after removal. You need to remove it and put it back in, but first turn off the PC.

If this does not help, then you need to open the unit and try connecting the video adapter to another connector on the motherboard. If you have an integrated video card, you need to try connecting the screen to it, but removing the discrete one. There is a possibility that the video card is broken. This is very unpleasant and will cost a lot of money, but what can you do?

Motherboard failure

The next probable cause is a malfunction of the motherboard. The computer can start and even work, but the screen does not show any pictures. To check this yourself, you need to open the computer unit and carefully examine the motherboard.

The video card connector may be damaged. To check, you will need another video card with which to turn on the monitor.

If there is no picture through the motherboard, then there is no need to rush to buy a new one, this thing costs a lot, first it is better to call a specialist.

Problems with the operating system

If the cause of the malfunction has not yet been determined, then you need to check the operating system. It happens that when the unit turns on, something about BIOS is written on the screen, but after that there is nothing except a black screen. During this entire process, you can even hear the sound of the operating system starting up.

All this happens due to a system failure after installing strange programs that change the design and functionality of the OS. We should not forget about viruses, which have been fought for a long time, but cannot be defeated.

To make the problem go away, we again go into safe mode and restore the system to its earlier state. If everything worked out, then be sure to launch the antivirus and look for the pest.

If the problem is in the operating system, but safe mode does not start, then you will need to reinstall the operating system.

BIOS Settings

If two video cards are installed in a computer unit at once, then one of them is integrated into the motherboard, and the second is not, and the wrong device may be selected in the BIOS. The computer sometimes automatically detects the video adapter that is needed, but there are exceptions.

You will need to reset the settings and return them to default. To do this, you just need to remove the battery from the motherboard and wait a few seconds. The settings will return to standard and everything will work.

Monitor failure

If the screen stops working unexpectedly and all possible reasons are not confirmed, then the problem may be in the monitor. Power surges, mechanical damage and other causes of breakdown lead to the user not seeing the image.

Determining which part of the screen is not working is very difficult. Only people who are familiar with electronics can handle this. If you are sure that the cause of the breakdown is the monitor, then you need to contact the service center.

But checking whether the problem is really in the monitor is quite simple:

  • You need to check the functionality of the old power cable and test the new one;
  • Do the same with the connecting cable;
  • Connect the monitor to another device (TV, smartphone, laptop);

Other reasons

If the computer unit starts up and there is still no image, then the cord contacts may be oxidized. To fix this, you need to take alcohol and gently wipe the ends of the cable. Gold-plated contacts are more resistant to oxidation. Also, do not put pressure on the bayonets; they may bend or fly off. In the first case, they can still be aligned with a needle or a small screwdriver, but if they break, you will have to go get a new cable.

In contact with

If your laptop screen does not turn on, then the first thing you should try is to reset the hardware settings. If this does not help, then you will have to look for other causes of the problem, which may be so serious that you cannot do without a trip to the service center.

Reset

A hard reset helps in most situations where the screen does not work. To execute it:

  1. Disconnect the charger from the laptop.
  2. Remove the battery from the laptop.
  3. Remove any residual charge and reset the hardware settings by holding down the power button for 20-25 seconds.
  4. Place the battery back into the laptop and connect the charger.

If a window appears asking you to select a boot mode after an incorrect shutdown of the device, select the normal Windows startup.

Checking the laptop display

If after resetting the hardware settings there is still no image on the screen, then try to determine which component has failed: the video card, matrix or other part of the display. An external monitor will help you do this. For example, on the ASUS website in the support section it is recommended to do the following:

  1. Connect an external monitor to your laptop using the existing interface - HDMI or VGA.
  2. Turn on your laptop. Using the combination Fn+F8, select broadcasting the image through the connected monitor.

If no image appears on the external screen, then the problem lies in the operation of the video card. This is also true for laptops from Lenovo, Acer and other manufacturers. If the picture is displayed on the monitor, then you should further look for a problem in the laptop display. The check should be carried out if the laptop's fan is noisy, the indicator lights up, or there are other signs that the laptop is turning on. If there is nothing like that, then perhaps the problem is not in the display - the entire laptop is not working.

Resetting BIOS Settings

If the problem occurs after changing the BIOS settings, you can try rolling them back to the factory state. Using a keyboard to do this will be problematic, but possible. The BIOS has hotkeys that are responsible for performing certain functions. A factory reset is usually done using the F9 key.

In theory, you can enter the BIOS by pressing the Delete key, then reset the settings (F9) and save the configuration (F10). But in practice, there is a high probability of missing the right moment, so it would be wiser to reset the settings by removing the CMOS battery, which stores the BIOS settings.

The main disadvantage of this method is the need to disassemble the laptop. But you will be sure that the BIOS settings have been reset, and if the cause of the black screen was incorrectly set parameters, the problem will be fixed.

Reinstalling the RAM stick

If the problem occurs after cleaning the laptop, then you should disassemble the laptop again and make sure that you installed all the modules correctly and connected the necessary cables. Therefore, for proper disassembly/assembly of a laptop, it is recommended to use the manufacturer’s manual - then the likelihood of an error occurring is significantly reduced.

In some cases, reinstalling the RAM strip can help solve the problem of no image on the laptop screen. This is especially true if liquid was spilled on the laptop’s keyboard, or it was left in a damp room for a long time, after which malfunctions occurred.


After reassembling the laptop, try turning it on again. If the black screen remains, although the laptop turns on and continues to work without an image on the display, then contact a service center. Possible causes of the problem:

  • Damage to the display cable.
  • Keyboard short circuit.
  • Inverter failure.
  • Backlight lamp failure.

These faults are unlikely to be resolved on your own; qualified assistance using special tools is required. The worst thing that can happen to a laptop is the motherboard failure. But then he will not show any signs of life. In any case, diagnostics at a service center will reveal the exact cause.

Problems resuming from sleep mode

If the screen remains black when resuming from sleep mode, the first thing you should do is check your video card drivers. The software must be the latest version and suitable for the system. You can download the latest drivers on the laptop manufacturer's website.

In some cases, the problem is caused by input devices that do not support Windows sleep mode correctly. Exiting sleep is done using the touchpad (mouse) or keyboard. If an external device is connected, it may block the laptop from waking up. To fix this flaw:


Save the configuration by clicking "OK". Do not prevent the mouse and keyboard from waking up the laptop at the same time, otherwise you will not be able to wake the computer from sleep. Set the ban on both devices in turn, checking if there is a positive effect.

Laptop overheating

If the screen on your laptop goes blank during operation, then most likely you are faced with overheating of the equipment. First of all, you should check the temperature of the video card. Use the free Speccy utility for this.

If you see that the video card’s temperature is too high (you can see the maximum permissible value in the specifications on the manufacturer’s website), then you should check the laptop’s cooling system. Sometimes just cleaning the cooling system is enough, but if the installed coolers are not powerful enough, then try using a cooling pad or installing more powerful fans.

Sooner or later, all users encounter problems related to personal computer hardware. The hardware of the “iron genius” sometimes malfunctions. The reasons for this can be very different. They begin with the simplest and safest thing - driver failure.

A driver is a program that is responsible for the correct operation of the equipment. But driver failure is nonsense. The situation is much more serious if the reason for incorrect operation lies in the equipment itself. Simply put, if the device is broken. You'll be lucky if there's a guarantee. But if not...

But we will not delve into this jungle, but will simply try to understand the main problems due to which the monitor may not display an image, and also solve these problems. So, what to do if the monitor does not turn on when you turn on the computer?

Preparation and diagnostics

Before you can fix anything, you need to understand the nature of the problem. If the monitor does not turn on when you turn on the computer, you first need to diagnose why this is happening. Let's think logically. If the monitor does not turn on when you turn on the computer, then it is not receiving a signal. And this is easy to check: all modern screens have an indicator showing the presence/absence of a signal. Looking at it, you can already draw the first conclusion.

If the signal is received, the indicator blinks, but the image is still not displayed on the screen (that is, it remains dark), the problem most likely lies in the video card. And another case when the monitor does not turn on when you turn on the computer may be associated with the “genius” himself. This is easy to determine. If the system does not boot, if it is impossible to even enter the BIOS, then the problem is clearly in the computer, not the monitor.

Reason #1: The monitor is not receiving power

To solve this problem, first check whether the screen's mains power is valid. If the problems are not related to the power supply, but to the drivers, then the monitor does not turn on and the light blinks. Let's say that there is power from the network, but the monitor is still turned off. Then you can try connecting it using another wire, if available. This problem is exactly the case when the monitor turns on, but there is no image on it.

Reason #2: The connecting cable is not connected correctly

Users sometimes wonder why the monitor does not turn on, without even suspecting that the problem lies in ordinary neglect, ordinary carelessness and carelessness. In this case, you need to carefully check how securely the connection cable is attached to the adapter or network, as well as to the power supply. The cable may be damaged and the signal may be interrupted.

If your computer has two video cards installed - discrete and integrated - then you need to connect the cable coming from the monitor to the discrete one. In personal computers, the discrete card connector is usually lower than that of the integrated card. If your monitor turns on and off, this could also be an indication of a bad connection. Sometimes the signal can be interrupted simply by touching or moving the cable.

It is worth checking how securely the cable was connected to the connector. You can take it out and put it back in. Moreover, this procedure should be done in a two-way manner: both from the side of the power supply and from the side of the VGA adapter of the monitor. There are special twists there. If one of them is untwisted, the connection may be interrupted. What can I say when both are poorly secured. In this case, you should not be surprised that the monitor does not turn on, there is no signal.

Perhaps the very last step that can get rid of this problem is to replace the cable. However, if the signal is received stably, the indicator is constantly on, without turning off, it is not advisable to buy a new cable. Most likely, in this case, the cause of the emergency is incorrectly installed software. Or incorrect debugging of the device. Actually, next we will look at the solution to these problems.

Reason #3: Incorrect settings

A glitch that appears in the picture settings can also cause the monitor to beep and not turn on. In the settings, as you know, you can edit the monitor resolution, its frequency and other parameters. If they were set incorrectly, the monitor simply will not display the image on the screen. You can check whether this is the case quite simply. If you have a second personal computer or laptop (and in most cases there are two or more similar devices in families) in working condition, then we connect the monitor with a suspected breakdown to this very device. If it displays an image on the screen, then the problem is clearly in the settings.

It is quite possible that there is a conflict between two video cards if they are installed in a PC, as well as in a laptop. To solve this, you can go to the BIOS and find there the item responsible for the operation of the integrated video card. There we turn it off, since it is much weaker and the entire load still goes to the discrete video card.

A card conflict is often why the monitor does not turn on at startup. This is especially evident in the case of laptops. The fact is that in the case of a PC, the monitor is directly connected to the card using a VGA adapter. But in laptops the principle is a little different. There are also reasons related to incorrect operation of drivers, but more on that later.

Reason #4: Incorrect software

As you know, many modern video cards require special software. It usually comes on a disk that comes with the video card. Laptops come with disks containing drivers for all devices. If the indicator light on the monitor is on, but there is no image on the screen, then the problem is most likely that the drivers are not working properly or are not installed correctly. In this case, incorrect operation of the screen may be due to an update to the driver version.

After the update, the operation of the video card is disrupted, and the output of the image on the screen depends directly on it. Solving a problem of this kind is not so difficult. You just need to log into the system using safe mode (usually you can open safe mode using the F8 or Del button) and delete the old version of the software. If possible, perform a system restore. Next, you can review the version and determine if it matches your device.

Reason #5: the video card is not working correctly

It often happens that when cleaning the system unit of a personal computer, users touch the slot with the video card. Or they simply pull it out and then insert it back, but do not fix it firmly in the socket. Getting your video card back to work is easy: check that it is securely fastened. If there are no problems with this, take it out and return it back. After this, if the card is technically correct, everything should work again. Do not forget about the safety rules: such operations can only be done with the system unit turned off from the network to avoid electric shock.

Perhaps nothing will change, the monitor will remain dark. In this case, the video card itself probably broke down. By connecting it to another computer, you can determine whether this is actually the case. If it does not work with another computer (if connected correctly, of course), then the problem is clearly in the board. Some users find that rearranging video cards takes a long time. And you don’t always have a second device at hand. If this situation arises, and your PC or laptop has an integrated, unused video card, activate it.

If the screen works, then the problem is discrete. Do not forget that you can activate the integrated video card in your PC only after disabling the discrete one. If the discrete card breaks down, no programs will help, you will have to change the model. This is probably the worst thing that can happen. Along with a broken monitor, of course, which will be discussed further.

Reason No. 6: the monitor is not working correctly

Check your display settings. As you know, monitors have several connection types. Now the most common of them is VGA. There are also DVI and HDMI. Again, make sure that the cable connecting the video card connector and the monitor connector is securely connected at different ends. If there are twists on the cable, make sure they are turned all the way. You can also look at other display settings, maybe something is incorrectly set there. Or even some option is disabled. Very often, having accidentally set the wrong settings, we ask why the monitor does not turn on. And the answer at this time lies on the surface.

If nothing suspicious was found in the settings, the cable is connected correctly and securely, but the indicator does not blink and the monitor does not reproduce an image, then we can say that the monitor is broken. This outcome is 95 percent. The remaining 5 are allocated only for cable failure, due to which the power supply to the display may be interrupted.

Reason No. 7: incorrect operation of the operating system

Let's assume that the BIOS loads without any problems and sounds (greetings) are played. But immediately after the logo appears, when, in theory, there should be a login, the image disappears. This means that the problems are not with the technical and hardware parts, but with the operating system. Perhaps the incorrect operation lies in the system files. Or maybe there is another mistake here. For example, third-party programs may change the operating visual style. Then a conflict will occur, the result of which we are seeing. Of course, we should not forget about viruses, which simply do not allow the drivers and operating system to work at full capacity. The operation of not only programs, but also devices may even be disrupted.

One solution if this problem cannot be solved is to reinstall the OS. But, you must admit, many users store quite valuable data on their PCs that they don’t want to lose. Let's be honest: few people back up their files. That is why you need to look for workarounds that will allow you to deal with incorrect screen operation without reinstalling the operating system.

Conclusion

So, what did we find out during the article? The problem when the monitor displays a picture can be caused by:

  • broken monitor;
  • broken video card;
  • broken cable;
  • incorrectly connected hardware;
  • incorrect software.

What solutions are suitable for each type of this problem?

  1. First you should check whether the cable is connected correctly. Inspect both ends. Perhaps one of them is not fully inserted into the connector or is not securely fixed there with screws.
  2. The cable may be damaged. You can check it by connecting it to another working monitor. If it is still faulty (as is the case with a monitor or video card), it will need to be replaced with a working one.
  3. Check how stable the software is. An incorrectly installed driver may be to blame. This may be a driver for a different laptop or PC model, as well as for a different device model (video card, for example). You can verify that the software is not working correctly by booting into safe mode. There you can also remove the old version of the driver and then install a new one that works.

Instead of a conclusion

What to do if the monitor does not turn on? The light and indicator are blinking, but there is no image? This is the case when the problem lies in the incorrect operation of the software. If the computer turns on and the monitor blinks, you should start in safe mode and go through the drivers.

So, we have examined all the problems that may relate to the incorrect operation of the monitor and video card of a personal computer and laptop. The article also answered the question of what to do if the monitor turns on, but there is no image.

Finding the reason why the monitor does not turn on is sometimes difficult right away, because the processes involved in displaying the image on the screen are interconnected and are located in completely different parts of the computer. There are several common problems that can arise in a situation like this.

Why doesn't the monitor turn on?

To decide what to do if the monitor does not turn on and correct the situation, you need to determine the cause of the problem. The missing image is due to:

  1. With a breakdown of the device itself.
  2. Defective motherboard, video adapter, connecting cables.
  3. Incorrect installation of drivers.
  4. Incorrect configuration of video system parameters.

Monitor does not turn on when I turn on the computer

If the monitor does not turn on at startup, you first need to make sure the device itself is working - see if the button is pressed "Power" on the panel, and whether the indicator lights up. Sometimes users turn off the display and forget about it, and the next time they use it they think that the device is broken. It’s easy to test the monitor’s performance:

  1. You need to disconnect its cord from the system unit and leave only the 220 V cable.
  2. Press the “Power” button.
  3. The light on the working device should glow without blinking, and the entry “No signal” should appear on the screen.

The monitor does not turn on - the light is blinking

If the indicator is blinking, the monitor is in standby mode, the power cord and signal cable are connected correctly (otherwise a message about this would be displayed), the monitor's power supply is also working correctly. There can be several problems with such symptoms - the video card, the motherboard settings, or the board itself. Sometimes you can observe a similar failure due to problems with RAM, when contact with one of its strips periodically disappears.

The monitor does not turn on - the indicator does not light up

If the monitor does not turn on and does not display “No Signal”, you need to do the following:

  1. Press the power button - it is probably disabled.
  2. Make sure the device is connected to an outlet. Test it yourself - try to power a lamp through it, for example.
  3. Check the power cable, try using a different one.
  4. If the indicator still does not light, the monitor must be taken to a service center - it is definitely broken.

Monitor beeps and won't turn on

The monitor never beeps and does not signal about accidents and malfunctions - only the system unit beeps. If the squeak comes from the monitor, the only way to go is to service. Any squeak warns of problems:


Monitor does not turn on after sleep mode

There are unpleasant situations when the monitor goes into sleep mode and then does not turn on when you press any button on the keyboard. The problem is often software:

  1. The settings for sleep mode or hibernation mode are incorrect, incorrect versions of video adapter drivers are installed, you need to update them to new ones.
  2. Often the monitor does not turn on after sleep mode when the Windows system is damaged. You need to roll it back, or completely reinstall this operating system.

The monitor turns on but does not show

If the computer turns on and the monitor still does not work and displays a black screen, it is advisable to try resetting the BIOS settings. You need to turn off the system unit and open its lid. On the motherboard you need to find a round flat battery that powers the BIOS, remove it for a couple of minutes and then put it back in place. Often this method helps if the computer and display are working, but the screen still remains dark when turned on.

Another reason why the image cannot be viewed is a malfunction of the LCD display in terms of backlighting. There are two options (in both cases you need to contact service for repairs):

  1. Failure of the voltage inverter board responsible for supplying voltage to the backlight lamps.
  2. The backlight lamps themselves have failed: if one or more lamps fail, the display automation turns off the backlight and the image on it is practically not visible, but it is there and is poorly visible.

Monitor goes blank and won't turn on

When the monitor goes out after a while during operation and then does not turn on, there may be several reasons. But all of them are associated with the failure of elements that are subject to natural heating during computer operation:

  1. Video card defect. This malfunction can be easily identified if you connect the monitor to another computer, and it will function flawlessly. Then either the video adapter is faulty or it overheats from highly resource-intensive applications and poor radiator cooling.
  2. Broken RAM modules. You can check RAM modules using standard Windows tools. If they are not functioning correctly, you can try to clean the contacts of the strips with a regular eraser or try to replace the modules.
  3. Display hardware failure. Basically, the elements of the monitor power supply are subject to strong heating during operation; in displays that have served for more than one year, a lot of defects can occur due to constant thermal effects.

The monitor does not turn on immediately

If, when starting the computer, the monitor does not turn on for a long time, or the picture appears slowly, flickering a little, then the fault most likely lies in the hardware of the monitor itself, the defect will progress, and the monitor will soon fail completely. Shortly before a complete breakdown, the monitor may turn off spontaneously, emit a strange characteristic squeak or smell of burning plastic. If the monitor is not sent in for service immediately, then after complete failure the cost of repair will increase significantly, or even it will not be repairable at all.

The monitor does not turn on the first time

Users note that the display may not light up on the first try. When asked why the monitor does not turn on immediately, experts answer that the failure most likely lies in the monitor’s power supply. It needs to be sent in for repair as soon as such a problem appears - they will disassemble it and replace the swollen electrolytic capacitors. Similar problems also arise with the LCD backlight inverter - it is extremely undesirable to carry out such repairs at home.


New monitor won't turn on

If the power of the monitor you just purchased does not turn on, the difficulty may arise due to the following:

  1. The cable is not connected correctly. Modern video adapters have several built-in connectors to which the display is connected - white DVI, blue VGA, and the newest one - HDMI. For a normal connection, the required cord must be inserted into the appropriate connector carefully until it is completely inserted into the grooves. The shape of the socket will tell you how to connect them. Then you need to tighten the two screws clockwise.
  2. Often monitors with several ports can only receive a signal from one of them. Only VGA or DVI connection should be used.
  3. After connecting to the display via the menu, you need to reset the settings and configure the system for new equipment.

Laptop monitor won't turn on

When a desktop computer monitor does not turn on, the reasons may be either with the cable connection or with the functioning of the system. With a laptop it’s a different story - in it the screen is connected to the hardware without external cords, but using cables. What to do if the display remains dark:

  1. Reset the settings: disconnect the laptop from charging, remove the battery from the laptop (if it is removable), reset the hardware settings by holding down the power button for 20 seconds, and reinsert the battery.
  2. Test the health of the laptop screen: turn on the laptop, press the Fn+F8 combination several times and try to select the screen broadcast through the external display. If the picture does not appear on the external screen, then the problem lies in the laptop’s video adapter.
  3. In some cases, the dilemma with the lack of an image can be solved by distorting the RAM strips. This solution is relevant if the device has been cleaned, stood in a damp room, or has not been used for a long time.
  4. If the laptop’s monitor does not turn on after sleep mode, then you need to roll back or reinstall the video adapter or chipset drivers - they must be the latest version and suitable for the operating system. In the settings, you cannot prohibit the mouse and keyboard from waking up the laptop at the same time - otherwise you won’t be able to wake it up from sleep.
  5. If after such manipulations the black screen remains, you need to contact a service center for diagnostics. The following problems may occur:

Unfortunately, problems with various computer components occur frequently. Not only internal devices located in the system unit can fail. There are often times when the monitor does not work. Diagnosing this device is not so easy. To check the performance of the screen, you need to have certain knowledge.

Causes

Why doesn't the monitor work? There can be many reasons for this problem. Sometimes they are obvious. Perhaps there was a voltage drop and the screen suddenly went dark. The monitor may have received physical damage during transportation.

But what to do if the monitor does not work, but no such problems have arisen? The reasons may be as follows:

  • lack of power to the monitor,
  • device connection problems,
  • screen settings failure,
  • lack of video card drivers,
  • video card malfunction,
  • problems directly in the monitor,
  • system errors.

Initial check

First you need to determine whether the monitor actually malfunctioned. To do this, hold down the power button on the computer and wait until it stops making noise. In fact, you need to perform a regular PC reboot, which is considered a “panacea” for all problems.

After turning off completely, you can turn on the computer again. If the lights on it come on and you understand that the system is running, then the PC is definitely working. Sometimes after a reboot the monitor begins to cope with the assigned tasks. If this does not happen and the monitor does not work when turned on, you need to look for other reasons.

No power to display

If the monitor does not work, check all cables, power buttons, etc. Often, users begin to panic and look for serious damage without even checking the monitor panel. Perhaps you simply forgot to press the right button.

There is a possibility that the user needed a free outlet and turned off the device from the network. If you see that the light is on, then the monitor is still connected and the problem is not a power supply.

Connection problems

What to do if the monitor screen does not work? You need to check the device itself and its wires for integrity. Perhaps one of them is damaged and is interfering with the connection. There is also a possibility that it is not installed tightly enough into the PC interface panel connector. This is especially true for older monitor models that connect via VGA.

You also need to check which connector the screen is connected to. It often happens that the monitor does not work due to the fact that it is connected to an integrated card, while the entire system is running on a discrete one. In this case, you need to inspect the PC interface panel and find another connector there.

If the monitor was connected correctly, you can remove and reinstall the cable into the correct port. It may be facing the wrong way or not connected tightly enough.

Connection problems also include non-working contacts on the cable and connector. If you have a spare wire, try replacing it. You can also connect the monitor to another computer or laptop to check its functionality.

Settings

A glitch in the picture settings could also be causing the problem. In this case, you need to try to change them. To do this, you can connect the screen to another connector or start the system's safe mode.

In safe mode, you can reset the settings. Typically, monitors have simple and advanced settings.

You also need to make sure that the integrated graphics adapter is disabled in the BIOS. Otherwise, the system cannot independently determine the connected device - and, as a result, the monitor does not work.

Video card drivers

Display malfunctions could also occur due to the fact that the video card drivers were removed. The same thing happens after updating them. If the problem really is a hardware failure, then you will be able to get into safe mode. Accordingly, it will be easy to “reanimate” the performance of the video card: restore the drivers or install new ones.

Problems with the video card

It's not just drivers that can cause the monitor to not work when you turn on the computer. There is a possibility that the problem is related to the graphics adapter.

If you recently cleaned the system unit, you may have touched the video card, and now it is not completely installed in the slot. You could also make a mistake with its connection. You need to disassemble the case and carefully inspect the motherboard and the adapter on it. You may notice burnt contacts.

Another option is to disconnect and reconnect your video card. At the same time, you can clean it if you haven’t done this for a long time.

Cleaning

Some users do not pay enough attention to cleaning. However, the dust that accumulates inside the case slows down the performance of the PC. Therefore, various types of failures may occur.

Moreover, if a similar problem occurs, you need to clean not only the video card. It is very important to get rid of all dust and even change the thermal paste if necessary. Don't forget about the memory modules and the entire cooling system. Of course, you shouldn’t do a general PC cleaning every month. It is enough to do this once every 3-4 months.

System errors

If there is a possibility of various kinds of system errors. Sometimes when the system starts, the light on the monitor lights up and blinks, but the image does not appear on the screen. You can try resetting the BIOS settings.

To do this, you need to disconnect your computer from the network. It is important to turn off the toggle switch on the back of the case and also remove the plug from the socket. To remove the current from the motherboard and its components, after all this has been done, you need to hold down the power button on the PC. You'll have to wait a little - and you can disassemble the case.

Depending on the location of the motherboard, you may need to remove it. To do this, accordingly, you need to disable all components. Next, you need to find a battery on the board. It is similar to the one that is placed in a wristwatch, only larger.

You need to get the battery out. This is done using a special lever. Next you need to wait 5-10 minutes. After this, you should install it again, assemble the computer and start it.

operating system

System problems also include problems with the operating system. How to understand that the problem is in the OS? If you turn on your PC and see the “BIOS” loading on the screen, and then the picture from the monitor disappears, it means that the operating system is unable to launch.

Many factors could lead to this:

  • software incompatibility of devices,
  • hardware failures,
  • malware,
  • incorrect settings, etc.

If you have the opportunity to reinstall Windows, then do so. There is a high probability that this will help get rid of the problem.

Laptop problems

Sometimes the monitor does not work on a laptop. What to do in this case? Solving this problem is somewhat more difficult, since the monitor and laptop are an inextricable mechanism.

Start by resetting your settings. To do this, you need to turn off the device. Also remove the plug from the outlet. Next you need to remove the laptop battery. To reset the settings, hold down the power button for 20-30 seconds. Now you can return the battery to the compartment and connect the device to the network.

If resetting does not solve the problem, you need to understand which component has failed. To do this you will have to find an external monitor. After connecting the screen, you need to turn on the laptop and press the Fn + F8 combination. Using these keys you can configure the image broadcast to an external monitor.

If the picture does not appear on the external display, it means there is a problem with the device’s video card. If there is an image, then you need to diagnose the laptop. The test will reveal a malfunction of one of the components.

The screen on a laptop may also not work due to software glitches. For example, you set the sleep mode at night, and after exiting it the image did not appear. You'll have to check your video card drivers. To do this, you need to go into safe mode and update or install new software.

Many people attribute the problem to the laptop overheating, especially if the screen goes blank during operation. In this case, you need to install a special utility, for example Speccy. It will help test the temperature conditions of all system components. Perhaps the cooling system has become unusable or needs to be cleaned. It is also worth considering purchasing an external CO.

If the monitor on your laptop does not work and no methods help correct the situation, you need to take the device in for repair. If this happens to an external device, then most likely you will have to buy a new screen.