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The TV does not see the computer via hdmi. Why the TV does not see HDMI: causes and malfunctions

" I gave detailed instructions how to do it, but when I tried to do the same on another computer with two operating systems installed (Windows 7 and Windows 10), I immediately ran into the fact that when loading, the dozens logo first appeared, and then the screen darkened and I couldn't do anything.

After a couple of hours of trial and error, it became clear that it was necessary to somehow first configure the video card, and then move on. And in order for the screen not to darken, you must first disconnect the HDMI cable. But is it possible to set the graphics card to detect the TV when the HDMI cable is disconnected? It turned out that it is possible.

How to set up a video cardNvidia

Before repeating everything that is described below, read the article to the end, in order to avoid unnecessary body movements and damage to your nerves.

I disconnected the HDMI cable and booted up the computer.

You can disconnect and connect the HDMI cable only when complete shutdown(plug socket from socket) of one of the devices, either the TV or the computer. Otherwise, you risk burning the video card.

After loading the operating system, right-click on the desktop and select the item " Control PanelNVIDIA».

In the NVIDIA Control Panel window that opens, on the right we find the item " Installing multiple displays", and if only the name of the monitor is displayed on the right, and the TV is not defined, then click on the link below" No display required...».

A small window will open No Display Detection" and in the block " TV detection"Tick the box next to the entry" Detect TVs when turned on", and click" OK».

Close the video card control panel and turn off the computer.

If you have multiple operating systems and they are hosted on different hard drives, then second hard the disk where we have not configured the video card yet, it is better to disable it physically for the time being. And then full customization the first operating system, disable the first HDD(I have Windows 10 on it), and connect a second hard drive (I have Windows 7 on it). But you can try and not turn off the disks.

After turning off the computer, reconnect the HDMI cable to the computer. Make sure that the TV cable is also connected to the HDMI connector. Read the article on how to do this.

After all the manipulations, do not forget to turn on both the computer and the TV.

Setting up a computer desktop through a TV

After the reboot, everything happened again, and I did not see either the boot menu or the desktop. Then I pressed the button on the TV remote control Source”, and select the HDMI mode on the TV.

If everything is done correctly, then the picture from the computer should appear on your TV. I have a menu for selecting the operating system. I chose the system on which I just configured the video card, i.e. Windows 10.

The desktop appeared, but completely clean. I clicked on it with the right mouse button and in the appeared context menu chose " Screen Options».

In the window " Options» it is clear that the monitor and TV are defined. We go down below and in the block " Multiple displays» install « Duplicate these screens».

Now the image on the monitor and TV should be the same. I have everything appeared both on the TV and on the computer.

And so that when the computer boots up, the monitor no longer darkens, I had to do the same in the second system - Windows 7. Now, from any system, I can connect to the TV and enjoy watching my favorite movies directly from YouTube.

Possible problems when connecting a TV to a computer

Defective cableHDMI. Sometimes it happens. Carefully feel the cable for any kinks or damage.
Connector not workingHDMI on TV. If there is another HDMI connector, then try connecting the cable to it.
Not installed or old driver video cards. Some users don't even know that they don't have video card drivers loaded. the system automatically installed its most suitable driver. This can usually be determined by the fact that Device Manager there is no name of your video card and when you select a resolution for the monitor, the slider does not move.

The video card does not "see" the TV. Set it up as described above.
The operating system has set the desktop to advanced mode by default, and therefore the desktop appears as blank. Read about it above.

If you had similar problems, then describe them in the comments. Perhaps this will be useful to someone.

Details Questions and answers

Many users are perplexed: why the TV does not see the HDMI connection if the cable is new, the signal source is working, and the devices were switched according to the instructions. There may be several reasons for this state of affairs, so the search for the problem should be done sequentially. We assume in advance that you are using an HDMI-HDMI cable without any intermediate adapters.

1. Check if the HDMI cable is working. Even very expensive brands are not immune from such a thing as factory marriage. In addition, due to careless operation, the cable may be damaged. You can check the HDMI cable by replacing it with a guaranteed working analog or by connecting it to other devices.

2. Check if you have selected the correct input source in the TV menu. To do this, press the external input selection button on the remote control of your TV. Depending on the TV model, this may be the Source (Source), Input (Input) or just HDMI button. Clicking on it will bring up a menu with a list. Select and confirm by pressing the Enter (OK) button the input to which you have connected the HDMI cable.

3. Check if the mode of operation with an external monitor (in this case, with a TV) is selected on your computer correctly. If the TV is the only monitor connected to your computer, then it should be detected automatically. Otherwise, for example, a TV and a display are connected at the same time, additional settings must be made.

In the desktop, you will need to right-click on the free field of the desktop, then go to the menu "Screen Resolution" (for Win7) or "Graphics Characteristics" (WinXP) and select the option to duplicate screens. For laptops, there is a special function button at the top of the keyboard with a monitor icon (usually F4). By pressing it several times simultaneously with the Fn button (for example, Fn + F4), we select the appropriate option for using the external TV screen.

4. Make sure your computer has the most up-to-date video card drivers. In the Device Manager of your computer, determine the version of the graphics card driver you are using. On the official website of the video card manufacturer, find the most current versions drivers and, if necessary, download and install them on your computer. Sometimes HDMI connection problems occur due to the use of an outdated version of the operating platform of the Smart TV.

5. Check your computer's operating system for viruses and malware. You should check your computer with any effective anti-virus program with fresh signatures.

6. Check the health of the HDMI ports on the TV and external signal source. Connectors can burn out or be mechanically damaged due to repeated incorrect cable connection. Although the HDMI standard allows a “hot” connection of the cable, experienced specialists recommend not only turning off both devices from the sockets at the time of switching, but also disconnecting the antenna cable from the TV jack.

Another rather exotic reason why a TV cannot see a computer via an HDMI connection is the lack of additional power on the discrete video card used in it, and working with an external device requires increased energy costs.

In the modern world of high digital technologies, it often becomes necessary to connect a TV to a computer using VGA or HDMI connectors, but often for various reasons these devices do not want to see each other and, accordingly, do not work. Consider the most common causes of such problems:

The cable used to connect the TV is broken or damaged. This can happen both with a previously used cable and with a new one, do not forget about the likelihood of a factory defect. The easiest solution is to replace the connecting cable.
The cable is definitely good, but the TV does not work with the computer, and the computer does not detect the TV. It is possible that the option to work with a computer via VGA or is not configured in the TV menu. The computer may have problems with video card drivers, when the drivers are missing or unstable, the operating system may not respond to external video devices. There may be viruses on the computer, some of them block various ways to connect external devices.
The TV connected to the computer gives some signs that it is connected to the device, the computer also reacts in a similar way, but the devices still do not work together. The reason may again be video card drivers or their absence. In this case, you should check for the latest drivers for the video card. Also, the function of working with an external monitor may not be configured on the computer. This feature can be enabled in your graphics card settings.
The TV and computer worked fine for a long time, but at some point they stopped cooperating adequately. In this case, there may be different options for working, for example, both a computer and a TV are detected, but do not work; only one of the devices detects the other; neither device detects the other. There are several reasons for this situation:
- kink of the connecting cable;
- damage to interface ports on a computer or TV;
- burning of internal parts of a computer or TV (capacitors, diodes, bridges, etc.), with such a breakdown, the image transmission function may partially work, that is, the devices see each other, but do not work effectively. The real reason is lack of power or loss of part of the engineering circuit.
Everything is working: TV, computer and connecting cord, but there is still no picture. It is possible that a removable video card is installed in the computer, which requires additional power, which for some reason was not connected at the time the computer was assembled. It becomes clear that working with external device requires additional power, and the video card is not able to function at full capacity.

A rough description of common problems will allow you to navigate the current situation and try various solutions to solve it. However, if you are not a big expert in electronics, it is recommended that you limit yourself to testing the connecting HDMI or VGA cable. If this operation did not help, it is best to call professional TV technicians from the TV Service Center company, who can quickly determine any cause of the malfunction (from viruses on the computer to fine soldering of microcircuits) and fix it right at your home.

Connecting a computer or laptop to a TV can occur in different ways:

VGA or D-Sud cable. Almost all monitors, PCs and TVs have such a connector. This is an analog connection that will not convey all the nuances of video files in the best way.
DVI. A more modern version. Can work with analog and digital devices. Has its own subclasses.
S video. In addition to it, you will have to purchase an adapter.
RCA or tulips. Connecting a laptop and a TV in this way is rare.
scart. popular way, since such a connector is in modern TV models.
HDMI cable. A good option for connecting a computer.

Common Causes of Connection Failure

If the TV does not see the laptop, and the connection is made, then the reasons may be as follows:

The cable is connected incorrectly or is defective.
Monitor settings error.
Incorrect operation of the video card of a laptop or PC.
The settings on the TV itself or any other brand are not configured.

Let's take a closer look at why the TV does not see HDMI and the second device through it.

Stages of equipment check

First of all, you need to check the quality of the wire connection and the condition of the connectors.
Next, you need to check the correctness of the computer settings.
It then checks for driver updates and graphics card settings.
Run an antivirus program to scan for malware.
Port check. It is recommended that you connect to another device.

Cable check

If the TV connected to the PC suddenly stopped working, and up to this point everything was set up properly, it means that the cable has come off or it has been interrupted. The first option is more common, as you can hook the adapter just by passing by. But the second one is less common, since the optimal length of the HDMI cable is not so long as to lie on the floor and fall under someone's heavy leg.

TV settings

When the TV does not see the laptop via HDMI immediately after connecting the equipment, it is most likely that the signal source selection on the TV itself is incorrect.

If there is no signal from the computer, then on the TV remote control you should find the “input”, “source” or “Imput” button, it may be immediately written “HDMI” on the TV from LG. Go to the window that opens and there, in the list of active inputs, select the one you need. Confirm the action by clicking on "OK".

If the equipment still does not connect after the performed operations, we carry out diagnostics further.

Monitor settings

After making sure that from the TV along the right path, we proceed to the diagnosis of the screen of a laptop or PC, or rather, to the settings. Any user with basic knowledge of their computer can conduct them:

Move the mouse over any free space on the screen and press the right button.
In the list that appears, select "Screen resolution" or "Graphic characteristics" depending on the type of OS.
Select the appropriate option for displaying the picture on TV. Permissible permission is written in the device passport, stick to it.

Everything is easier to do on a laptop. Hold down the "Fm" and F4 buttons at the same time, hold until the best option is selected. After that, the laptop will connect to the TV correctly and the error that there is no image will go away.

Video card error

Another reason why the device connection does not work is the incorrect functioning of the PC video card. In this case, the laptop does not see another device or does not display an image on it.

To eliminate it, you need to try to install new drivers that are on the global network for each device model. Sometimes it may be necessary

Connecting a computer or laptop to a TV can occur in different ways:

VGA or D-Sud cable. Almost all monitors, PCs and TVs have such a connector. This is an analog connection that will not convey all the nuances of video files in the best way.
DVI. A more modern version. Can work with analog and digital devices. Has its own subclasses.
S video. In addition to it, you will have to purchase an adapter.
RCA or tulips. Connecting a laptop and a TV in this way is rare.
scart. A popular way, since such a connector is in modern TV models.
HDMI cable. A good option to connect a computer.

Common Causes of Connection Failure

Cable check

TV settings

When the TV does not see the laptop via HDMI immediately after connecting the equipment, it is most likely that the signal source selection on the TV itself is incorrect.

If the equipment still does not connect after the performed operations, we carry out diagnostics further.

Monitor settings

After making sure that the signal from the TV is on the right path, we proceed to the diagnostics of the laptop or PC screen, or rather, to the settings. Any user with basic knowledge of their computer can conduct them:

Move the mouse over any free space on the screen and press the right button.
In the list that appears, select "Screen resolution" or "Graphic characteristics" depending on the type of OS.
Select the appropriate option for displaying the picture on TV. Permissible permission is written in the device passport, stick to it.

Everything is easier to do on a laptop. Hold down the "Fm" and F4 buttons at the same time, hold until best option. After that, the laptop will connect to the TV correctly and the error that there is no image will go away.

Video card error

Another reason why the device connection does not work is the incorrect functioning of the PC video card. In this case, the laptop does not see another device or does not display an image on it.

To fix it, you need to try to install new drivers that are in global network for each device model. Sometimes it may be necessary complete reinstallation or element replacement.

Today, any user can connect a laptop as well as a desktop computer to an LCD flat screen TV using an HDMI cable, and then enjoy an expanded picture. Such a connection is not always successful: for example, there may be no sound. But there are times when the computer does not see the TV connected via HDMI at all, although the wire was just purchased from the store. There are many reasons for the incorrect operation of the cable, and the search for the true problem must be done consistently.

What should I do if the TV does not see the laptop via HDMI? Video cards of all modern products support this connection: HDMI on the TV is installed on almost every model. If the laptop was connected according to all the rules, but there is still no image, then we connect the laptop to the TV, while sequentially checking all possible problems.

Cable check

Not a single product, even the most reliable brand, is immune from factory defects, especially when manually assembled. When buying, the quality of the image and sound are checked, but they never check specific connectors and connection jacks on the TV - at best, they make sure that they are available, and even then not all buyers. It often happens that cable does not work although it has not been used for very long. It is necessary to connect the same cable, but to another device, if it functions normally, then the reason that the computer does not see the TV lies in the latter. It is necessary to diagnose the TV for recognition of similar signals.

Checking the signal source

On the remote control remote control, press the button to select the external input option. From specific model product depends on which button on the remote control from the TV you need to press: "source" (source), "input" (input) or "HDMI" (LG, Sony or Samsung). After clicking on the screen, a menu appears with detailed list of active inputs. We select and confirm, by pressing OK or Enter, exactly the desired input, into which the cable coming from the laptop was previously connected.

Connection port failure

Any connector can be mechanical damage or burn out during a power surge, which in our electrical networks Not unusual. Experienced craftsmen advise to connect HDMI wires at offline devices, even antenna cable it is recommended to disable for this time.

There is also such a very rare reason why the TV does not see HDMI: it simply does not have additional power on the video card, and without this the connection will not work.

Windows display settings

If the connection cord and interfaces work, but system unit still does not display the picture on the TV screen, then the problem lies in the settings of the operating system. How to properly set up the system different versions OS, below.

Windows 7.

On the desktop you need to open the task menu and find the item "screen resolution".
Select the item "connect to the projector" and click duplicate so that the image remains on each monitor. If you need to completely transfer the picture to TV, then click on "projector only".

Windows 8.

After entering the control panel, select the "appearance and personalization" submenu.
In the "screen" section, find "multiple displays" and select "duplicate" or "extend the table to only the second display."

Windows 10.

In the display options, select "display" and scroll down to "multiple displays".
If all connections are made correctly, then the second screen will be displayed immediately, it remains only to indicate how exactly to use it - duplicating or as the main one.

Setting resolution and frequency

Sometimes, after following the above recommendations, the picture is still not broadcast. In this case, the reason may be that the TV and the system unit are not compatible in their parameters. For example, for an old SD or HD TV, the FHD resolution set on the PC graphics card is too high. In this case, it is worth entering the screen settings using the above algorithms and, by selecting the second display (TV), lower the resolution for it.

The second reason that can affect the image is frequency. By default, the PC graphics card is set to 60 Hz. For TV, you should try to gradually reduce the value.

Important to remember! Some TV manufacturers provide a connection to a PC, and there is a special mode for this. It can be combined with the image setting or standalone. Through it, you can select the appropriate resolution for the PC.

Some Samsung TVs There was a problem in which a window appeared with the text “HDMI mode not supported”. There were many recommendations on the forums to combat this, but it turned out that this was a factory firmware problem, and in order to fix the defect, you need to contact service center manufacturer where the new software is installed. Modern Samsung TVs do not have such nuances.

How to update the software on the video card

If connection difficulties have not gone away after the recommendations above, then updating the software for the PC associated with displaying the image can help. The driver could be outdated, corrupted, or simply missing. In such a situation, you should open the device manager and look at the "video adapters" tab. To do this, on the "my computer" icon, select the "management" menu, which opens by clicking on the right mouse button.

If next to the adapter lit red or yellow icon, that is, there is a problem in the operation of this node. To update, you can immediately open its properties and select automatic update driver, but it is more efficient to download it from the manufacturer's website.

Advice! The update can be found using the utility Driver Pack Solution. Its convenience is that it scans the system itself and looks for all the necessary drivers.

How to set up sound

When connecting a TV to a PC, it may happen that there is an image, but no sound. This means that the wrong adapters/cables are being used, or the computer is not set up correctly.

In the tray, you need to click on the sound settings icon and select "playback devices" for the 7th and 8th Windows or open the "sound options" for the 10th version of the OS.
We see a list of available speakers, among them there should be a TV - switch to it and, if necessary, click "use by default".

If the sound still does not appear, then you should check the volume on both devices, and also update software sound card.

Perhaps the fault lies in the fact that operating system was infected with viruses, or there was an unauthorized entry of malware. With the help of a powerful antivirus program (computer protection program) that can find all spies of any level, we carefully scan your computer and reconnect.

Some experts strongly advise you to check the version for your Smart TV platform: sometimes a laptop does not connect via HDMI for this very reason. Update the Smart TV firmware and the problem may disappear.

If the equipment has not started working together, the reason lies in an internal breakdown that only the master can diagnose and fix. Of course, if you have knowledge in the field of electronic stuffing of devices, you can try to repair the TV yourself.

How to connect laptop to TV via HDMI? I have an inexpensive Samsung LCD TV with two HDMI inputs, and I also have a laptop that has an HDMI output. Can I without special knowledge connect laptop to TV via HDMI cable(which came with the TV) and use your TV as a monitor. The fact is that I have an anniversary soon, relatives and friends will come. All my family photos and home videos are on the laptop. I would like to show all this to the guests on TV, and not huddle near the laptop, we have a small one, with a diagonal of 15 inches. And a lot of guests will come, what you will see there, on a laptop. Yes, and my daughter watches cartoons on a laptop, although it is more convenient to watch them on TV. Anton.

How to connect laptop to TV via HDMI

Friends, I assure you, there is nothing easier. Almost all of us have TVs and laptops that we don't use 100 percent of. In every modern, laptop and in every modern video card there is an HDMI interface output, which was invented in order to transmit digital video data high definition and multi-channel audio without quality loss. Transfer where? For example, on modern TV that supports the HDMI standard! And this means that with the help of an HDMI interface cable we can connect a TV and a laptop to each other. The image present on the laptop will also be displayed on the TV. The picture on the TV will be as clear and beautiful as on the laptop, and the sound will be multi-channel and rich. That is, there will be no distortion of video data and sound.

By the way, we have other articles on this topic:
. Or how to watch a video on a laptop on a TV
, in it you will learn what to do if, after such a connection, there is no sound or image on the TV, or wrong resolution screen!

Now I will tell you one interesting story. Recently, a friend of mine invited me and my wife to his birthday party. He is an interesting person, is engaged in tourism, travels a lot and goes on business trips abroad, has a lot of interesting photos. A lot of relatives and his friends gathered for the holiday organized by him. Many came from afar and did not see my friend for many years.

At some point in the celebration, all the guests decided to look at a huge collection of photos and videos of my friend on a laptop. Previously, we looked at all the photos in dusty albums, but now we are making progress, we use a computer for these purposes. So, at some point, I realized that twenty people around the laptop simply, well, would not fit in any way, and everyone wanted to see the photo collection. And then I explored the TV in the big room. The TV was not very new, Samsung 4 series (LED type), it had two HDMI inputs, which is what you need, and on the laptop, as expected, there was one HDMI output. It was possible to connect the laptop to the TV via an HDMI cable, which I found in the box from the TV, my friend did not take this box to the trash just because the warranty on the TV did not end - three years.

If you have a Samsung TV, then when buying with it, you should original cable HDMI, take care of it, what they sell in stores is sometimes not of the best quality.
So let's go. We connect the laptop and TV with an HDMI cable. The laptop and TV must be turned off. There are two HDMI ports on the back of the TV.

Get an HDMI cable

And we connect it, for example, to the HDMI 2 connector,

Connect the other end of the cable to the laptop's HDMI port.

We turn on the laptop and TV, it starts operating system and nothing on TV. Only message " Weak signal or no signal

the guests are waiting tensely and thinking: “Well, they didn’t let me see the pictures on the laptop and it won’t work on the TV.”
On Samsung TVs, to display a list of all available video sources, press the Source button on the remote control.