The image does not appear on the monitor; the card is working. No image on monitor
Users do not have to wonder why the monitor does not turn on very often. But, if the problem has already arisen, it can be quite difficult to cope with it.
And in such a situation, when the computer is left without the main means of displaying information, you should take as many steps as possible to restore it.
And this can be helped by studying the signs accompanying a device that does not turn on - a blinking light, a system reboot, and even the behavior of the computer itself.
The check will help you find out exactly what problem has occurred and help you fix it yourself or by contacting service.
Hardware faults
Despite the fact that it seems to the user that it is the monitor that is not working, and everything is in order with the system unit, most often the problem is in the computer.
In this case, even after submitting the device for repair, you can receive an answer that it works quite normally.
And buying a new monitor will generally lead to a waste of money.
So, the main reasons why nothing is displayed on the display after pressing the power button could be:
- Problems with the video card, which is used to connect the system unit and the monitor;
- Incorrect operation motherboard.
- And finally, another hardware problem is actually a broken monitor.
In each of these cases, determining the cause of the malfunction when starting the computer is quite difficult - especially for not very experienced user, not faced with similar situations.
And yet, there are several techniques that can help not only check what the problem is, but also the degree of its complexity.
As a result, you can determine what will be needed to resolve the issue - is it worth trying to do it on your own or can you not do without a service.
Computer problems
A fairly common reason for the lack of an image on the monitor is the computer not turning on for some reason.
This happens, for example, when the power supply of the system unit fails or its power is not enough to support the operation of all systems connected to it (including the video card).
It is worth noting that modern gaming graphics cards have power consumption of 150–180 Watts, and AMD processors– up to 70 W.
And, trying to run a PC with a 300-watt power supply (taking into account the need for energy consumption from the motherboard as well, hard drive and optical drive), the user overloads the system and the computer does not turn on.
Although the same power supply is perfect for a nettop with a regular built-in video card.
A problem with the main power supply is detected by a message that lights up on the monitor before it turns on, and it disappears after just a couple of seconds.
It can be solved by replacing this element - enough simple procedure, which requires a few minutes and a new power supply.
If the PC still works, but when you turn on the computer the built-in speaker produces a signal in the form of a squeak, the memory is faulty.
Advice! After cleaning the contacts or, in rare cases, replacing the RAM sticks (for such a radical solution, it is worth conducting additional tests), the problem usually goes away.
You can find out that it is the motherboard that is faulty in the same way as with a faulty power supply - the computer simply does not turn on, and the indicator on the monitor continues to light.
Although to clarify the reasons, you will most likely have to contact the service. But you should not give the monitor there, but system unit.
Additionally, you can make sure that the fault for the lack of a signal from the monitor lies with the computer, and not with the device itself that does not turn on, by connecting the monitor to a laptop, second computer, or video player.
This test option is ideal in case of a faulty system unit or an incorrectly configured system.
Since both the player and another PC will work with it normally, but the problem will have to be solved with the computer itself.
Video card
If the user has recently taken apart the computer and made some moves of modules on the motherboard, it is possible that the problem with the monitor is actually the graphics card.
A video card that is moved when cleaning the computer from dust may not work and the monitor, accordingly, will not turn on.
To check the board, you will have to disassemble the system unit back.
The absence of a result does not necessarily mean that the video card is not related to the problem.
Additionally, you can check it by switching the connecting cable from the monitor to the connector of the second graphics card - modern PCs, especially gaming ones, have two of them - built-in and discrete.
A normally working display indicates the need to change the video card or temporarily use a second one.
If you have two video cards, the problem occurs when the drivers for these devices conflict. Disabling the built-in graphics card in the BIOS will help eliminate it.
Monitor
When the button blinks but the monitor does not work, you can assume that the problem is in the computer. If the indicator does not light up at all, the problem is in the display.
In extreme cases, even the matrix may be broken. But most often the problem is nutrition.
You can find out if the cause of the breakdown is a problem with the cord after checking its connection to the power supply. It is recommended to check the operation of the monitor with a different cable.
If the lamp still does not light up, the power supply is faulty and should be replaced.
Another common reason, which is already characterized by a burning light, is the lack of communication between the monitor and the computer.
In this case, the processor is working normally (there are no signals, the power supply fan is running), and the indicator indicates that power is supplied to the display, but there is still no image.
The connecting cable should be switched to another video card and returned again.
Software problems
If the problem is not with the hardware, but on the computer, it is much easier to fix it. You don’t have to contact either a service or a warranty workshop.
All that is required from the user is to reconfigure the system or update the drivers.
Monitor settings
The reason why the display does not work may be due to incorrect image settings. For example, it's wrong set frequency or screen resolution.
You can determine the problem by trying to connect the monitor to another computer, and get rid of it by resetting the settings after logging in via safe mode, which may require another display.
Drivers
Wrong installed drivers also lead to the absence of an image.
Although the monitor will turn on for a while and show at least the operating system boot screen.
They deal with the problem by switching to safe mode and updating the drivers.
operating system
The display of the BIOS loading when you turn on the computer, and the further disappearance of the image may be caused by serious problems with operating system.
This situation is caused by viruses that get onto the PC from the Internet or from removable computers. information media, and other operational problems system files.
If safe mode or restoring the system to a previous working state does not help, the OS is reinstalled.
This will take no more than 20–30 minutes, and the monitor’s performance will be restored automatically.
Although to get some extensions you will still have to install new drivers.
Start loading BIOS
In the first part of the article, we looked at the case when you can’t hear the coolers and the lights on the system unit don’t light up. Today we will look at a case where the computer turns on but no image. Despite the popular belief that this is caused by problems with the monitor, this is usually not the case.
So, let's start in order.
1. On there is no image on the monitor. Check if power is being supplied to the monitor. Usually the monitor has light indication(light bulb) indicating power. If it does not light up, check the power cable that goes to the monitor. Also pay attention to the cable that connects the monitor and the system unit. Change if necessary. Have you tried pressing the monitor’s power button?)) Still doesn’t work? Then let's move on.
- If your The computer turns on but there is no picture, then this may be related to your computer's BIOS. You can send it yourself BIOS settings to the initial ones. To do this, you need to open the cover of the system unit, find a battery on the motherboard that supports CMOS (non-volatile memory in which BIOS settings are stored), pull it out, wait a minute and insert it back. Maybe this will help.
3. Problems with RAM. We open the system unit, unclip the latches and take out the RAM modules. We remove dust and carefully clean the contacts with an eraser. Just in case, we take out the BIOS battery, wait a minute, put everything back and try to turn it on.
4. Faulty video card.
We unclip the latches and take out the video card. We clean the dust and wipe the contacts. We look at the textolite of the video card (the platform on which the video card elements are located). If in some place it became very dark, the video card overheated repeatedly, as a result of which it could fail. We pull out CMOS battery, wait a minute, put everything in place and try to turn it on. If there is a known good video card, we try to install it. If you have a built-in motherboard video card, we try to connect the monitor to it.
- Problem with the power supply.
The power supply can supply a voltage that is suitable for the computer to hum the fans and blink the indicators, but is completely insufficient for full-fledged work. You can measure the voltage with a multimeter, but the most adequate (if you have a working power supply) option is to try connecting a known good power supply.
- Dust, dirt, spilled milk)
A trivial but common reason that the computer turns on, the coolers are spinning, the lights on the system unit are on, but no image in the dust. After all, most users rarely look inside system case(only when such problems arise))). But dust can cause a lot of trouble, even causing computer components to fail. Therefore, we turn off the power to the computer, carefully remove the video card, RAM, expansion cards from the connectors and clean everything from dust with a brush and vacuum cleaner. You can also use a compressor or compressed air in a can.
In most cases, the reason that the monitor does not turn on or there are problems with the image is the incorrect operation of the video card, incorrect settings, or an incorrect connection.
The simplest check:
- Disconnect all wires from the monitor
- Connect only the power cable
- The monitor should turn on. “No Signal” appears on the screen
After some time, the monitor switches to energy saving mode - “Stand by” (the power indicator changes color, the picture disappears)
In this case, the monitor is most likely working properly. Of course, there are possible exceptions.
You can also check the health of the monitor by connecting it to another computer.
If the monitor has proven to be inoperable, you should contact the service for diagnostics and repair. Our article will tell you what to pay attention to when describing the problem, so that when telephone conversation You were correctly advised on the price and timing of repairs.
Before calling the repair shop, find out the exact model name of your monitor. A number of models have standard faults that have long been known to service center employees.
The monitor does not turn on, the power indicator does not light up
If the monitor shows no signs of life, there is likely a power problem. Most often, this breakdown is easily fixed.
There may be a problem with the monitor's power cable or connectors. In this case, if you change the position of the power cord, the indicator may light up briefly when contact is made. If it is completely inoperable, the power supply will most likely need to be repaired.
Power indicator blinks, no picture
Flashing of the voltage indicator (cyclic power on/off) regardless of the position of the cord is a signal of incorrect operation of the power supply or main board.
The service center will determine the cause of the problem and fix it.
Power indicator is on - no image, backlight is on
Most likely the problem is with the processor board (MB) of the monitor. For diagnostics, you will have to contact a service center, since such “symptoms” do not allow you to immediately determine the cause of the malfunction. The technician will be able to give an exact answer only after examining the monitor in disassembled form.
The monitor backlight does not light up or goes out after a few minutes of operation
Sometimes the picture can be seen in reflected light, when looking at the monitor from above, from the side. The monitor responds to buttons and there is access to the menu. It is possible that immediately after turning on the monitor works, and after a few minutes the backlight turns off. The problem is in the inverter or in the backlight lamps: they burn out over time or can suddenly fail as a result of mechanical stress (for example, an impact). Repair consists of replacing the lamps or converter. For this procedure, you should choose a service meticulously: the procedure is complex, requiring a certain level of qualifications and increased accuracy from the specialist.
Screen brightness decreases and a reddish tint appears
These symptoms indicate burnout of the backlight lamps, as in the previous case. Decreased brightness and a reddish tint may occur only in a specific area of the screen or throughout the entire monitor. The problem is solved by replacing the lamps, and various dark screensavers and monitor sleep mode settings serve as preventative measures. The fewer nights the monitor sits with a static picture on, the longer the lamps will last.
Stripes on the screen
The appearance of vertical or horizontal stripes on the monitor screen is a sign of a malfunction of the decoder cables. If the stripes change location, then the problem may be in the video card, and if the stripes have a constant location and color (black, white, color), then the problem is in the monitor matrix. For replacing the master's cables in service centers are practically not undertaken, since there is no confidence in the success of the operation and that the problems will not return after short time. The only solution to the problem is to replace the matrix assembly. If your monitor is under warranty, contact service immediately after the stripes appear, even if there is only one stripe and it doesn’t bother you.
If stripes appear on the monitor, warranty period whose service life has already ended, find out at the service center the cost and estimated repair time for your model. An original matrix is required, and the cost can be comparable to buying a new monitor.
Image or color distortion
Usually occurs due to a loss of contact in the signal cable or broken connectors. Check the signal cable(VGA,DVI) by replacement.
The DVI (digital) cable can only be switched (!!!) on a de-energized monitor!!!
If the defect persists, then this is most often due to either incorrect work video card, or with a breakdown of the monitor’s processor board. In some cases it can be fixed by flashing the firmware.
The technician will be able to name the exact cause of the malfunction and the cost of repair only after diagnosis.
The monitor does not display an image from the computer, it displays messages
If, instead of the usual picture, the monitor displays a service message (“check the cable” or “ non-optimal mode"), and this state does not change after appropriate changes (replacing the cable, setting the required mode), most likely the problem is in the monitor. A number of monitor models with a MICOM processor (Samsung 710 (N/V), 713/913 lines, some Philips, LG) have a standard malfunction associated with the rapid failure of the processor. Repairing or replacing the faulty processor completely eliminates the problem.
Problems with LED monitors
LED monitors differ in the type of backlighting: LEDs are used instead of lamps. Failure of LEDs, which manifests itself as a decrease in brightness in a separate area of the screen, is quite rare and can be successfully repaired.
Please note that slight uneven backlighting of the LED monitor may budget models already found upon purchase. In this case, the center of the screen is illuminated more than the edges. This is due to the use of cheap materials to create the scattering layers of the screen. Not ideal color reproduction is also a feature of LED monitors; they are simply not designed for professional work with color.
One of the common failures of LED monitors is screen flickering, which becomes noticeable when the brightness is reduced. For some models, repair is limited to flashing the firmware; for others, the processor board needs to be replaced.
One day you turn on your computer, and everything seems to be fine, the system unit is running, but the monitor screen does not work. We will tell you what to do in this situation and how to solve the problem in our article.
First, it’s worth saying a few words about diagnostics. Very important in in this case determine the nature of the problem. If, when you turn on the computer, the monitor does not react at all, this means that it is not receiving a signal from the computer; if the monitor responds to turning on the computer, the indicator shows the connection with it, then the problem is either with the video card or with the monitor itself. If the system itself does not load, and the BIOS loading is also not displayed on the monitor, then the reason is in the operation of the computer itself.
After this analysis, proceed to find the reasons for the lack of image on the monitor and solve this problem.
Why doesn't the monitor work?
Next, the site's experts will tell you about the most common reasons why the monitor does not turn on or there is no image on the monitor. 
When the monitor displays loading BIOS, but after that a black screen appears and there is no sound from the OS starting, then reinstall the system.
If the monitor does not work even after all the steps taken, then try connecting it to a laptop or video player to check its functionality. If the monitor works when connected to a video player and does not turn on when working with a computer, then the problem is in the video card or other components of the computer. If the monitor does not work when connected to another device, take it in for repair. You can also try connecting another monitor to your computer or modern TV, if there is an image, the problem is in your monitor, if not, then look for the problem in the computer components.
We wish you success in solving this problem, and if you were unable to solve it, then our specialists will help with this.