What to do if the monitor does not display an image

monitor diagnostics

Further, so that I recommend checking. this is the monitor itself (especially in those cases when, after turning on the device, absolutely nothing is shown on it, even for a split second.).

    disconnect it from the system unit and turn it off. Then turn it on again (without connecting it to the system unit!). if the monitor is in order, as a rule, a message should appear on it stating that “Signal cable not connected!”

monitor, does, display, image

of course, it’s even better to connect the monitor to another device, such as a laptop. This is done quite simply, in most cases one HDMI cable is enough: https://ocomp.info/kak-podklyuchit-monitor-k-noutbuku.html

The monitor is connected to the laptop. the picture is the same here and there / Conclusion: the monitor is working properly!

By the way, the system unit (laptop) for diagnostics purposes will also not be superfluous to connect to another “screen”, for example, to a TV. How to do it better. see here: https://ocomp.info/kak-podklyuchit-noutbuk-k-TV.html

Many monitors have one rather popular “sore”: failure of the screen backlight. Try shining a flashlight or desk lamp on the screen (see photo below). If through the “haze” you saw a familiar desktop, then there is a problem with the backlight. Its repair, as a rule, is not too expensive and rather quickly removable.

Backlight burned out. the image is visible only when the table lamp shines on the surface of the monitor

The monitor does not show an image, but the computer is working

Good day!

Today’s note will be about one fairly popular problem, which can be encountered both in the event of some serious breakdowns, and because of some nonsense.

For example, not so long ago, in the same office next door (with my place of residence), two girls decided to move furniture (along with the PCs on them ). After this action, they were faced with the fact that the monitor on one of the computers does not show an image! As it turned out later, when they were rearranged, the HDMI cable came out of the connector a little (at least they guessed to turn off the devices, and not carry them in the on state, otherwise the HDMI could burn out.).

Actually, below I will give a number of simple steps that will help you diagnose and find the cause of the missing image (at least, before contacting the service, it is better to exclude various “trifles” yourself.).

shutdown of “unnecessary” equipment, diagnostics of the system unit

In some cases, the “culprit” of the problem may be a malfunction of some peripheral equipment: another monitor, printer, scanner, etc. Even a “bad” RAM disk can cause a malfunction.

For diagnostic purposes, I would recommend doing the following:

    open the lid of the system unit and clean it from dust (including slots for RAM and video card);

then remove all RAM dies and clean their contacts with an elastic band (more on this in more detail). After that, install only one memory bar (for the duration of the diagnosis);

Cleaning memory contacts with an eraser and a brush

  • disconnect the floppy drive, front panel with USB connectors, expansion cards (network and sound cards, tuners, modems, etc.) from the motherboard. hard disks;
  • then connect only the monitor and power to the system unit (no keyboard, mouse, printers, etc. need to be connected!);
  • turn on the device and check its functionality;
  • if the computer is working: turn it off, and start gradually reconnecting everything that we disconnected earlier (checking the performance of the PC after each action). For example, they connected another RAM bar. turned on the PC, if everything works, turn it off again and connect the next piece of hardware.
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    In this relatively simple way, step by step, you can find the fault. Often, by the way, the cause of the problem lies in some front panel with USB ports, in which there was a short circuit.

    checking cables, connectors, switches

    And so, the first thing I recommend to pay attention to: is the system unit itself working, is there a hum from the coolers, are the LEDs on the case blinking??

    Also inspect the back wall of the system unit. there is an additional one on it. switch (usually located next to the power connector, see the screenshot below). Of course, it must be in the “On” mode.

    If we are talking about a laptop: be sure to connect the power supply to the device. If the battery is old, it can be discharged in a matter of moments (even if you have not worked at the device).

    If the computer does not show signs of life at all (does not turn on), I recommend that you familiarize yourself with this material: https://ocomp.info/ne-vklyuchaetsya-kompyuter.html

    After that, if the system unit still showed signs of life, check the cable that connects your monitor to it (usually HDMI, Display Port, VGA or DVI): is there any visible damage on it? For example, cables can often be twisted, broken, chewed by pets, etc.

    • reconnect the video cable to the PC and the monitor (often, over time, connectors and ports can “loosen” and start to play. and such a simple action will help eliminate the lack of connection.);
    • check the operation of the device using a new (known good) video cable (HDMI, VGA.). In rare cases, there may be no visible damage to the cable, however, the inside of the copper veins may be damaged.!

    According to the POST standard, if the video card is burnt out (for example) and does not respond to the motherboard’s requests, then after turning on the PC, instead of the image, you will hear one long and two short beeps. (note: a special speaker (speaker) is installed in the system unit, which will “hum”).

    are there any other ports on the monitor / video card?

    As a rule, most monitors and video cards have at least 2-3 different ports for receiving / transmitting video signals. Today these are HDMI, VGA, DVI and Display Port.

    So, in some cases, the problem occurs with one of the ports, but the device itself may be quite working (for example, on the same video card, the HDMI port could burn out, but the DVI could be serviceable).

    over, in most cases, such a check costs nothing. many monitor models come with several cables (and even adapters).

    What to do if the monitor is showing nothing (black screen)

    reset BIOS / UEFI settings

    If you notice that when you turn on the PC, an image with the manufacturer’s logo appears for a moment on it, initialization takes place, and then when Windows should start to load. everything disappears. try to go into the BIOS and reset the settings to default (default).

    By the way, this behavior of the PC may indicate a problem with the HDD (but in the previous step, if you disconnected the disk from the motherboard, it should have been detected.).

    Also, in this case, usually, typical errors appear on the screen.

    In order not to repeat here how to perform a similar procedure, I will give a couple of links to my previous notes (instructions).

    1) How to enter BIOS (UEFI) on a computer or laptop [instructions]. https://ocomp.info/kak-voyti-v-BIOS.html

    Everything is on the SIM. Add-ons are welcome.

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    Connection instructions

    So, to transfer the image to TV, we need to connect two devices using a cable:

    • Turn off your TV and laptop. This must be done so as not to damage the contacts as a result of a possible spark.
    • Connect the ends of the HDMI cable to the input and output connectors (TV and laptop, respectively).
    • Turn on both devices.

    Most likely, you will not see the projection of the laptop screen on the TV.

    • Enter the TV Menu and find the Input List item. It can also be called up by pressing the “Input” key on the remote control.
    • In the list that appears, click on the input source: HDMI.
    • After that, the image from the computer should appear on the TV.
    • Press the WinP keys at the same time.
    • In the window that appears, select the type of projection.

    The best way is the “Second Screen Only” option, in which the image from your machine will be accurately copied to the TV screen, while the computer display itself will remain off. Choosing a different connection will cause two monitors to work at the same time, which is distracting.

    If your panel has a high resolution display, the transmitted image may be blurry or grainy.

    To fully utilize the resources of the TV screen, you need:

    • Right click on the desktop.
    • Select “Screen Options”.
    • In the window that appears, click “Advanced display options”.
    • Then click on “Detect” and after displaying the parameters of the external screen, select the maximum resolution from the drop-down list.

    Advice! If you do not have cable TV, and IPTV hits your wallet hard, you can watch TV through a computer: turn on online broadcast or sopcast on PC and broadcast the image on TV.

    Why is there no image on the TV from the computer (laptop) via HDMI cable

    In some cases, after connecting the TV to a computer or laptop via an HDMI cable, the image simply does not appear on the TV. Rarely, but it also happens that there is sound via HDMI, but there is no picture on the TV. Although, it seems to me that most often they are faced with the reverse problem when there is an image, but there is no sound via HDMI.

    In this article, we will try to deal exclusively with the problem of image output via HDMI cable. It seems that everything is simple there, we connected the TV to the computer, selected the desired input on the TV, and if necessary, then on the computer we also select the required image output mode. And according to the idea, everything should already work. And instead we see the inscription “No signal” on the TV.

    Before moving on to any tips, check out the instructions for connecting your TV to your computer via HDMI:

    If you do everything according to the instructions, but there is no result, and the image has not appeared on the TV, then now we will understand.

    HDMI not working on Windows 10 laptop

    Problem 2: sound is not transmitted

    HDMI integrates ARC technology, which allows audio to be transmitted along with video content to a TV or monitor. Unfortunately, the sound does not always start to be transmitted immediately, since to connect it, you need to make some settings in the operating system, update the sound card drivers.

    In the first versions of HDMI, there was no built-in support for ARC technology, so if you have an outdated cable and / or connector, then to connect the sound you will either have to replace the ports / cables or buy a special headset. Audio support was first added in HDMI version 1.2. And cables manufactured before 2010 have problems with sound reproduction, that is, it may be broadcast, but its quality leaves much to be desired.

    Lesson: How to connect audio on TV via HDMI

    Problems with connecting a laptop to another device via HDMI are common, but many are easy to fix. If they cannot be solved, then most likely it will be necessary to change or repair ports and / or cables, since there is a high risk that they are damaged.

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    We are glad that we were able to help you solve the problem.

    How to connect a TV to a laptop via Wi-Fi or HDMI cable in Windows 10?

    If you decide to connect your TV to a computer or laptop on Windows 10, now I will show you and tell you how to do it. We will connect in two ways: via a wireless Wi-Fi network, and using an HDMI cable. Under the Wi-Fi connection, I will enter the connection via a Wi-Fi router, and the DLNA technology setting. When from a computer, you can watch movies, photos, and listen to music on the TV. Well, the connection using an HDMI cable is a normal HDMI connection With this connection, our TV will be like a monitor in Windows 10.

    Honestly, it doesn’t make much difference whether you have Windows 7 or Windows 10. Connecting to a TV via HDMI or Wi-Fi is practically the same. But, let’s take a look at the example of a laptop with Windows 10 installed. I think this article will be relevant and useful for a long time.

    What you need to connect?

    • laptop or desktop PC with HDMI output;
    • TV with HDMI input;
    • reversible HDMI cable.

    Attention! To get a high-quality picture with an audio track, do not use adapters from HDMI to DVI and VGA, otherwise watching movies and photos will leave only negative emotions.

    How to connect a TV to a computer via HDMI in Windows 10: detailed instructions

    In the case when Wi-Fi Direct is not configured, Miracast is not supported, there is no flash drive with a large volume, and I really want to watch a movie in good quality, we remember the HDMI connector. a great way to duplicate an image to another device without losing quality. Therefore, the question arises: how to connect a TV to a computer via HDMI in Windows 10 and what is required for this? The answer is below.

    Determining the cause of the breakdown by the BIOS signal code

    Each manufacturer uses a different combination of short and long signals, so we strongly recommend our article on this topic about Honor to be familiar with all the signals of their BIOS manufacturer. Based on the results obtained, try to solve the problem yourself or take the computer to a service center.

    Danyl_0ff 20 Apr 2010

    Iron branch

    You switched the telly to another connector, on the telly it seems like you need to switch from aha to hdmay

    I mean, I have all the connectors signed, if you’re talking about the source, then I switched it too, everything works on the old video card, on the new one it doesn’t

    Danyl_0ff 20 Apr 2010

    Monitor check

    Sometimes the problem is with the monitor itself. Check if the power is connected, if it is on and the cable is connected to the video card. Try replacing the cable if possible. In addition, you should carefully make sure that the HDMI, VGA, DVI or Display Port wire is connected correctly.


    I bought 1660 ti MSI ventus, I kind of connected everything, via HDMI to the screen, but the screen does not work, I connected the old one via vga.
    returned the old one to check via HDMI, all the rules (btv instead of a screen I have a TV set).

    on the new vga there is no vga connector, so do not advise
    also it’s not about the cable itself, because I checked it second, everything is the same.

    already completely desperate and ready to call the master, but decided to run here to start.

    Those. no reaction at all? No signal? using a vgaHDMI adapter?

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