Why can't my TV see my laptop via HDMI? There is no sound via HDMI to the TV from the computer. There is no signal when connecting the TV to the computer.

HDMI no signal

In this article I would like to consider a common problem when There is no signal on the TV connected via HDMI cable.

No signal via HDMI

HDMI says no signal

If this is your first time connecting your TV to your computer and you see a floating message on the screen hdmi no signal, you need to make some settings both on the computer and on the TV itself.

No signal via HDMI to TV

In order for it to appear HDMI signal on TV, take the remote control and press the button with the image or name SOURCE.

After the connection options appear on the screen, select the appropriate HDMI port. If there is more than one such port, you will be offered multiple ports. Select the one you need and wait for the picture to appear.

Why is there no HDMI signal?

If after this the signal still does not appear on the TV, as indicated by the floating message, open the screen settings on the computer. To do this, click on Desktop right click and select Screen resolution .

In the window that opens, in the line Screen select your device e.g. Digital TV.

Computer news, reviews, solutions to problems with the computer, computer games, drivers and devices and other computer programs." title="programs, drivers, problems with the computer, games" target="_blank">Компьютерная помощь, драйверы, программы, игры!}

→ Duplicate these screens . In this case, the image from the computer monitor screen will be duplicated on the TV, that is, both the TV and the computer will show the picture.

→ Expand these screens . Don't choose.

→ . The image will be displayed on the device that is first in the list of screens.

→ . Accordingly, the image will be displayed on the device that is second in the list of screens.

HDMI signal lost

Why did the hdmi signal disappear on the TV?

One of the common problems is when the image was shown on the TV via hdmi and disappeared for no reason. What to do if on TV hdmi signal lost and why did this happen?

The solution to the problem is very simple. In most cases, for one reason or another, the screen display setting, which is still there in Screen Resolutions in the Multiple Screens line, is to blame.

Possibly selected Display desktop on only 1 or Display desktop only on 2. That's why The image is shown only on one of the devices. If you want to show on both devices, select Duplicate these screens.

There can be many reasons why there can be many reasons why there can be many reasons why there can be no image on the TV when connecting a computer via the HDMI interface. We will try to consider the most common of them.

Setting the TV input

First of all, you should go to the TV menu and check whether the exact HDMI port to which the cable was connected is selected as the input source. There may be several ports on the back or side of the TV, and each of them has its own index (HDMI 1, HDMI 2, HDMI 3, and so on). Therefore, you should find and press the button for selecting an external signal source on the television remote control. This could be a Source, Input, or HDMI button (each manufacturer has its own designation).

In the list of inputs that opens, select the one to which you connected the HDMI cable connecting the TV to the computer. After selecting the desired input, confirm the action by pressing the OK (Enter) button. A mirror image of your computer desktop should now appear on your TV screen. If the screen continues to remain black, then the problem should be looked for in the settings of the computer’s video card.

Setting up your computer's video card

It is quite possible that the video card settings do not indicate that the TV will be used as an additional monitor, so the image is sent only to the computer monitor.

To fix the problem, right-click on a free field of the computer desktop. In the drop-down list, find the item “Screen resolution” (for Win7) or “Graphics characteristics” (for WinXP). A special menu will open in which you can select options for using the main and additional monitors that suit you. It is most convenient to choose the option of cloning (duplicating) TV screens and computer monitors. After pressing the confirmation OK button, an image should appear on the TV screen.

When connecting a laptop to a TV, the procedure for selecting a screen looks much simpler: you need to simultaneously press two function buttons Fn + F4 on the keyboard several times until an option that suits you appears. Instead of F4, another button can be used, which should have an icon with one or two monitors.

Mechanical failure

Well, the last reason explaining why there is no image on the TV when connected via the HDMI interface is a malfunction of the cable itself or the communication ports on one or both devices.

No one is immune from manufacturing defects, so if you encounter problems with the connection, you should definitely check the serviceability of the HDMI cable. The easiest way to check the cable is to replace it with a guaranteed working analogue or try connecting it to other devices.

A common cause of failure of HDMI ports is incorrect connection of cable connectors to them. In addition to mechanical damage to the internal contacts, the port may burn out due to problems with static electricity. Although the HDMI standard supports “hot plugging” of equipment, due to the lack of proper grounding in most of our household appliances, the HDMI ports continue to burn. Therefore, experienced technicians advise completely de-energizing the equipment before connecting the HDMI cable, and additionally removing the antenna plug from the TV.

If the materials in this article did not help you solve your question, ask it on our forum.

The reasons why you want to get an image from a small computer monitor onto a large diagonal HDTV can be very different. Someone would like to know what his favorite computer game looks like on a big screen, and someone would not mind watching their favorite movies on discs comfortably and comfortably, sitting on the couch, but does not have a DVD set-top box.

All this is quite easy to solve if you know how to display an image from a computer to a TV. In principle, there is nothing complicated about this. You just need to understand a little about the standards of image input/output ports, if necessary, purchase additional equipment, connect it and configure it, taking into account some of the nuances.

Look at what image input/output connectors your computer and TV have. Computers and laptops usually use a 4-pin or 7-pin S-Video port, or a 15-pin standard VGA video connector for image output. Their appearance is shown in the image.

Almost all TVs of recent years have tulip-type connectors (RCA) for video signal input. It can often be divided into color channels and designated 3RCA (RGB). To connect a computer to a TV in this case, you will need an S-Video to RCA adapter (tulip).

But it’s not always possible to find such an adapter, and with its help you can only get SDTV standard definition images.
Therefore, look to see if your TV has a VGA input. If it is present, then the task in this case is simplified and the computer and TV can be connected with a standard VGA-VGA cable from the monitor.
To obtain high-definition HDTV images, computers and laptops are equipped with HDMI output ports, and televisions are equipped with similar input interfaces. In this case, the TV and computer are connected with an HDMI-HDMI cable of a suitable length.
Since TVs can be equipped with a large number of input and output ports that are similar in appearance, always pay attention to the direction of the signal in the connector. The signal input is always designated by the English word IN, and the output is OUT. To avoid damage to electronic devices, connections must be made with the TV and computer turned off.
After establishing a “physical” connection, it requires making some software settings.
Turn on the TV and in its settings, specify the video source corresponding to the connection established in the previous paragraph (Component, PC, or HDMI).
Start the computer and after it boots into the Windows Vista or Windows 7 operating systems, right-click anywhere on the desktop and select “Personalization” from the menu that appears.
In the window that opens, go to the “Display Settings” component and launch it. In the Display Settings window, you should see a second inactive (gray) monitor numbered 2.

Click directly on it and check the “Extend the desktop onto this monitor” and “Use this monitor as the main” options that become available.

Click the “Apply” and then “OK” buttons. When prompted to save the changed display settings, click Yes.

As a result of these steps, an image should appear on the TV screen.
If the resolution of the connected TV is automatically determined incorrectly and black unused bars remain on the screen, you will need to launch “Display Settings” again and change the resolution to the required value on the now active second display by dragging the corresponding slider.
After the settings have been made, you can work with the TV screen as with a regular monitor. Run games on your computer, watch movies in a video player program, while receiving an image on a large TV diagonal.

Additional tip
When you disconnect your computer from your TV, be sure to set your computer screen as your primary screen again. Otherwise, you will get a blank desktop when you launch it.

In the era of high digital technology, we can get the best from the TV and computer through their connected connection. Creating such a special connection between technical devices is possible with the assistance of DVI, HDMI or VGA connectors. But, often and for various reasons, these devices do not want to make contact with each other. You can always eliminate existing problems if you know what lies at the root of their occurrence. An approximate description of common problems will help you navigate a difficult situation and open up new ways to eliminate them.

What is HDMI?

HDMI is a multimedia interface that transmits high-definition video and digital audio signals. This type of cable is widely used for connecting TVs, game consoles, stand-alone video players, as well as audio receivers to mobile devices and computer equipment. If you want to play a video or show photos on a big screen, then you can’t do without such a device.

Manufacturers of modern multimedia equipment now add HDMI connectors to the standard equipment of devices by default. There are five main types of such ports, which are marked with Latin letters from A to D and differ in size. In addition, each type of HDMI cable differs from the other in functionality and scope of application.

It is also worth noting that recently the possibilities and advantages of a wireless connection when connected via HDMI adapters have been widely discussed. Outwardly, they resemble USB-Bluetooth and differ only in the connectors.

Connecting the TV

Watching movies, amateur videos and photos is much more convenient on a big screen, especially since almost all modern video cards allow you to connect to a TV. The picture quality and sound playback on a computer is significantly different from what you will see and hear if you connect a blue screen to it.

There are the following basic ways to connect a TV to a monitor:

connection via the VGA interface, which is equipped with almost all modern video cards;
connection via HDMI cable (this method is widely used for transmitting high definition signals);
connection via the DVI interface, which is universal for digital and analog monitors (originally designed for digital monitors that did not require conversion of incoming signals).

The connection can be realized without using various types of wires. A connection via WIFI allows you to quickly establish contact between the monitor and the screen, and in addition, frees your home from a web of cables.

Turn on devices

The TV can always be transformed into a powerful multimedia platform if you turn on all devices in the correct sequence.

The connection algorithm is as follows:

The sequence of operations must not be changed under any circumstances. After connecting the devices, they need to be configured.

How to set up your display

The Windows 8 and 7 operating systems themselves detect the device and configure the connection if an HDMI cable is used. When using other connection methods, you need to know how to configure the image output to the display yourself.

The algorithm for displaying images on the display in windows 7 and 8 systems is as follows:

Setting up the display in the WindowsXP operating system is always done manually. You will have to press the buttons a little and switch the TV to AV mode.

Setting up the video card

After the connection is made correctly, a picture from the computer should appear on the TV screen. If the image does not appear, you need to adjust the inputs and outputs and adjust the resolution.

The video card is responsible for all visual effects and display of multimedia files on the computer. Each model has its own characteristics that should be taken into account when setting up.

But the general algorithm of actions will always remain unchanged:

Successful completion of the connection of two devices will be indicated by a system message about the use of an additional screen.

Outputting sound to TV

Playback of multimedia files will be complete only after setting up the sound card. If you don't do this, then you'll just end up in the silent film era.

Sound output to the TV is carried out according to the following plan:

If after making all the settings nothing plays, you need to pay attention to whether the video card even supports your sound output method.

What to do if the computer does not see the TV via HDMI?

Almost every modern TV model is equipped with an HDMI connector. Most video cards support multimedia output in this way. But if the computer does not see the HDMI TV, you need to find out what is preventing the two devices from connecting.

Diagnosing problems includes the following steps:

step one: check the HDMI cable for serviceability and correct connection;
step two: check the system settings and working with a computer via an HDMI cable in the TV menu;
step three: reinstall the video card drivers.

Some types of TVs simply do not support an HDMI connection and you should not forget about this. We are talking (mostly) about outdated models that are not equipped with a special connector. In such cases, you can try other connection methods. For example, via DVI or VGA.

Video: computer does not see TV

Possible reasons

The disease can be cured if you know the causes of its occurrence. Problems connecting your TV to your computer can be resolved if you know what caused them.

The main reasons why the computer does not see the TV:

the connection cable is damaged, incorrectly connected or defective;
the computer does not detect the TV;
the TV does not support the selected connection method;
video card drivers or lack thereof;
damage to interface ports;
the computer has a removable video card installed;
burning of internal parts of a TV or computer.

There can be many reasons for problems in the coordinated operation of two devices. If you are not a specialist, then you can confidently diagnose only external problems associated with the cable.

Solving the problem

Knowing the causes of the main violations in the symbiosis of a computer and TV, any problem can be eliminated.

Troubleshooting algorithm:

You shouldn’t try to fix problems on your own that only a professional can handle. But basic mechanical restorations are within the competence of any PC user. Do you really need to contact a technician to correct the position of the cable?

No signal from computer to TV

The absence of a signal most often indicates that this TV model cannot be connected via HDMI. It is possible that the connection type is incorrectly marked in the options. In this case, you should try other connection methods.

Photo: connecting a TV to a video card

The reason for the lack of signal on the TV may be viruses, outdated drivers for the video card, or cable failure. Be sure to check the video card settings and select the correct type of information display. Finally, look into the BIOS and check the activity of the connection elements.

Checking the signal through different connections

Through trial and error you can achieve the truth. If after all your efforts you are unable to resolve the connection problems, you can check the signal using different connection methods.

The due diligence process is as follows:

If the work done does not make any changes to the existing state of affairs, then, most likely, the reason for the lack of signal is some kind of internal breakdown or flaw in the cables and I/O ports.

The development of digital and multimedia technologies has given us the opportunity to enjoy viewing photographs, amateur and professional videos on a large screen TV. It is for this purpose that televisions are connected to phones and computers. The connection between two pieces of equipment, if done correctly, is established in the shortest possible time.

But it happens that the image or sound is not reproduced on the TV screen. There can be many reasons for this. It is important to install them so that the problem can be eradicated in the future. Only a specialist can conduct a detailed diagnosis of problems and fix them. You shouldn’t undertake serious restoration work yourself. But this rule does not apply to the elimination of minor and primitive defects.

proremontpk.ru

The computer does not see the TV via HDMI: reasons and solutions

Today, almost any television panel can be connected to a personal computer or laptop. The equipment is connected via an HDMI connector. But often users encounter the problem that the computer does not see the TV through the HDMI input or there is no sound. There are several reasons why such problems occur, so it is necessary to identify the problem sequentially. Read also, which cable to choose to connect your TV.

Device connection methods

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

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

The HDMI connector on your TV is usually located on the back or side. The computer almost immediately after connecting begins to see the other device, but problems may arise that there is no image or other errors. Moreover, this is the most proven and common way to connect a laptop to a TV. Read also, ways to connect Xbox to TV.

Common Causes of Connection Failure

If the TV does not see the laptop, but the connection is complete, then the reasons may be the following:

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

Let's look in more detail at why the TV does not see HDMI and the second device through it.

Equipment testing steps

First of all, you need to check the quality of the wire connections and the condition of the connectors.
Next, you need to check that the computer settings are correct.
Then it checks for driver updates and video card settings.
Run an antivirus program to scan for malware.
Checking the port. It is recommended to connect to another device.

Read also, ways to connect a flash drive to a TV.

Cable check

If the TV connected to the PC suddenly stops working, and until that moment everything was set up properly, it means that the cable has come loose or has been broken. The first option is more common, since you can hook the adapter simply 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 get under someone’s heavy foot.

In any case, if there is no picture, first check whether the connectors are fully inserted into both devices. And are there any foreign objects on the adapter itself? You can also try installing a different cable to make sure this error does not occur. Read also why the TV does not connect to Wi-Fi.

TV settings

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

If there is no signal from the computer, then on the TV remote you should find the “input”, “source” or “Imput” button; it may be written “HDMI” right away on the LG TV. 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 operations performed, we carry out further diagnostics.

Read also how to watch videos from iPhone on TV.

Monitor settings

Having made sure that the signal from the TV is going along the right path, we move on to diagnosing the laptop or PC screen, or rather, to the settings. They can be carried out by any user with basic knowledge of their computer:

Hover your mouse over any free space on the screen and click on the right button.
In the list that appears, select “Screen resolution” or “Graphics characteristics” depending on the type of OS.
Select the appropriate option for displaying the picture on TV. The device passport specifies the acceptable resolution, stick to it.

It's easier to do everything on a laptop. Press and hold the “Fm” and F4 buttons simultaneously until the optimal option is selected. After this, 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 connection of devices does not work is the incorrect functioning of the PC video card. In this case, the laptop does not see the other device or does not display an image on it.

To fix this, you need to try installing new drivers that are available on the global network for each device model. Sometimes a complete reinstallation or replacement of an element may be necessary.

Read also how to adjust the sound on your TV via your computer.

The last thing that could be the reason that the TV does not receive an image via HDMI is a broken port. For diagnostics, check the functionality using other adapters. If the devices become visible, this is where the error lies.

Signal check

If all manipulations do not bring the desired result, it is recommended to check the signal using other connection options.

The check is performed as follows:

Disconnect equipment from the network.
Connect the HDMI cable to the computer and screen.
Turn on the TV and press the “Source” button.
In the column that appears, select the HDMI operating mode and click “OK”.
Turn on the computer: when the OS boots, if everything is done, the TV screen and monitor will broadcast identical information.
If the signal does not appear, then you need to go to the “Device Manager” to see if there are still available connectors for connection.

7. For example, if VGA is available, then you need to perform the same algorithm of actions, only set the appropriate mode in the settings.

If even after these steps the equipment does not start working, then most likely the problem is an internal failure.

Thus, the computer may not see the TV via an HDMI cable for various reasons, which can be diagnosed and fixed at home without special knowledge in the field of modern technology. Read also how to make a TV from a computer monitor.

TeleVopros.ru

Why doesn't the computer see the TV when connected via hdmi?

Today, any user can connect a laptop or desktop computer to a flat-screen LCD TV using an HDMI cable, and then enjoy an enhanced image. This connection is not always successful: for example, there may be no sound. But there are times when the computer does not see a TV connected via HDMI at all, although you just purchased the cable from a store where it was extensively tested. There are many reasons for cable malfunction, and the search for the true problem must be done consistently.

We carry out diagnostics

What should you 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 connection of the laptop was carried out 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 manufacturing defects, especially when assembled by hand. When purchasing, the quality of the image and sound are checked, but they never check the specific connectors and connection sockets on the TV - at best, they make sure that they are present, and even then not all buyers. It often happens that the cable itself does not work, although it has not been used for such a long time. You need 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 to recognize similar signals.

Checking the signal source

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

Working with the monitor

If the laptop does not see the TV when several monitors are connected simultaneously, then additional settings need to be made. These simple manipulations can be performed by any user without special education:

move the cursor to any free space on the desktop;
To display the menu, click on the right mouse button;
we find the “screen resolution” section - windows 7, and if it’s windowsXP, then “graphics characteristics”;
then you need to select an acceptable option to duplicate the screen.

Any laptop has a specific F4 key, if you press it together with the Fm button (located to the right of Crtl) repeatedly, you can select the desired option for the external screen - this is how the computer begins to see TV.

Video card and drivers

Open the “Device Manager” of your laptop to check the driver versions of the installed video card. Outdated software is the main reason why the TV cannot see the laptop. In this case, you need to go to the manufacturer’s website, where you can download new “firewood” - the video card will be updated, you will be able to establish the required connection.

Perhaps the fault lies in the fact that the operating system was infected with viruses or unauthorized penetration of malware occurred. Using a powerful antivirus program (computer protection program) capable of finding all spies of any level, carefully scan your computer and reconnect.

Some experts strongly advise checking the version for your Smart TV platform: sometimes a laptop does not connect using HDMI for this very reason. Update the Smart TV firmware and the problem may go away.

Connection port problem

Any connector may suffer mechanical damage or burn out during a power surge, which is not uncommon in our electrical networks. Experienced technicians advise connecting the HDMI cable when the devices are disconnected from the network; it is recommended to even disconnect the antenna cable at this time.

There is also 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.

All details and connection options can be viewed using this video:

Troubleshooting algorithm

If you know the reason why there is no image on the TV screen, then eliminating various violations is already a solvable task. This is what the approximate procedure for eliminating detected faults looks like:

Check the quality of the connection, visually check the external condition of each connector or connecting cables if the laptop no longer sees the TV.
Then the setup of the computer systems is checked: check what choices were made in the menu items responsible for connecting devices.
Check for updated video card drivers.
In some cases, it won’t hurt to check the settings of the video card itself once again.
Perform a smart scan of your entire computer again to ensure there is no malware.
Visually check the condition of the multimedia ports and their proper operation - a positive result will be immediately visible when connected to another device, for example, a DVD player.

Signal check

If you have done everything possible, but there is still no signal from the laptop to the TV, try other types of connection. Use a rule of thumb where all existing connection methods are used in sequence. The due diligence process will look like this:

first we determine the available connections and connectors that the household appliances we have chosen use;
disconnect the TV and laptop from the network;
connect the laptop to the TV using a proven HDMI cable;
turn on the TV, setting up its connection to the computer using the remote control;
we activate the laptop, if the signal passes, then a picture similar to loading the operating system should be displayed on the TV screen;
no signal - go to the “Device Manager” section, find out what active connection types are available;

if it is possible to establish a connection via VGA, then you need to connect a similar cable to the products;
then we carry out the same actions as with HDMI, only press the “VGA” button on the remote control;
If you decide to make a connection via DVI, then connect the cable to the appropriate connectors, and select a similar option in the TV settings.

If the equipment does not start working together, the reason lies in an internal breakdown, which only a specialist can diagnose and fix. Of course, if you have knowledge of the electronic components of devices, you can try to repair the TV yourself.

Tehnika.expert

The TV does not see the computer via HDMI

HDMI is a popular connector for connecting various equipment to each other (for example, a computer and a TV). But when connecting, various kinds of difficulties may arise - technical and/or software. Some of them can be solved on your own; to eliminate others, you may need to send the equipment in for repair or replace a faulty cable.

If you have a cable with any intermediate adapters, for example, you can use it to connect to a DVI connector. Instead, it is better to try using a regular HDMI cable operating in HDMI-HDMI mode, since the TV/monitor may not accept a cable that implies the ability to connect to several ports simultaneously. If the replacement does not help, then you will have to look for and eliminate another cause.

Check the HDMI ports on your computer/laptop and TV. Pay attention to these defects:

Broken and/or rusted, oxidized contacts. If any are found, the port will have to be replaced completely, because contacts are its most important component;
Presence of dust or other debris inside. Dust and debris can distort the signal, which will cause inconvenience when playing video and audio content (low or no sound, distorted or slow images);
Review how well the port is installed. If it begins to loosen at the slightest physical impact, then it will have to be fixed either independently or with the help of specialized service workers.

Perform a similar check on the HDMI cable, paying attention to the following points:

You need to understand that not all cables fit all HDMI connectors. The latter are divided into several main types, each of which has its own wire.

Method 1: Correct TV settings

Some TV models are unable to independently determine the signal source, especially if some other device was previously connected to the TV via HDMI. In this case, you will have to enter all the settings again. The instructions for this case may vary slightly depending on the TV model, but its standard version looks something like this:

For some TVs, the instructions may look slightly different. In the 2nd point, instead of the suggested options, enter the TV menu (the button with the corresponding inscription or logo) and select the HDMI connection option. If the TV has several connectors of this type, then do the rest in accordance with points 3 and 4.

If this method does not help, use the instructions for the TV (it should tell you how to connect via an HDMI cable to this particular device) or pay attention to other ways to solve the problem.

Method 2: Setting up your computer

Incorrect configuration of a computer/laptop with multiple screens is also the reason why an HDMI connection is ineffective. If no external displays other than a TV are connected to the computer, then this method can not be considered, since problems arise if another monitor or other device is connected to the PC or laptop using HDMI (sometimes other connectors, for example, VGA or DVI) .

Step-by-step instructions for setting up multiple screens for devices running Windows 7/8/8.1/10 look like this:

It is worth remembering that HDMI is capable of providing a single-stream connection, that is, correct operation with only one screen, so it is recommended to disconnect the unnecessary device (in this example, the monitor) or select the “Display desktop 1:2” display mode. To begin with, you can see how the image will be broadcast to 2 devices simultaneously. If you are satisfied with the quality of the broadcast, then there is no need to change anything.

Method 3: update the drivers for the video card

Initially, it is recommended to find out the characteristics of your video card, since some graphics adapters are not capable of supporting image output on two displays at once. You can find out this aspect by looking at the documentation for your video card/computer/laptop or by using third-party software.

First, update the drivers for your adapter. You can do it like this:

You can also download and install drivers from the Internet, always from the manufacturer’s official website. It is enough to indicate the adapter model there in the appropriate section, download the necessary software file and install it following the instructions.

Method 4: clean your computer from viruses

Most often, problems with signal output from a computer to a TV via HDMI arise due to viruses, but if none of the above helped you and all cables and ports are working properly, then the possibility of a virus penetration cannot be ruled out.

To protect yourself, it is recommended to download and install any free or paid antivirus package and regularly use it to check your PC for dangerous programs. Let's look at how to run a PC scan for viruses using Kaspersky antivirus (it's paid, but there is a demo period for 30 days):

Problems with connecting a computer via HDMI to a TV rarely arise, and if they do occur, they can always be solved. Provided that your ports and/or cables are broken, you will have to replace them, otherwise you won’t be able to output anything.

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

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lumpics.ru

Why doesn't my TV see HDMI?

The topic of the conversation should rather have been called “How to connect a TV to a computer via HDMI.” Most beginners do the procedure incorrectly, asking questions that are difficult for a professional to answer. Let us remind you: HDMI is a high-performance digital media content transmission interface. Images, music, other entertainment content. Will it be possible to listen to music on TV? It will be possible from a home theater, if you have one! The HDMI port was invented as a high-performance means of transmitting information. Let’s skip a few words, find out why the TV doesn’t see HDMI, and how to fix it.

Connecting a TV to a Computer HDMI

Correctly connecting the TV using HDMI

Home theater owners should know the truth - a digital media device has a playback source menu. The easiest way to illustrate the fact is with old stereo systems. Traditionally, devices had three blocks:

Cassette decks: recording, playback.
Radio broadcast reception.
Laser discs.

Moreover, the blocks refused to play melodies simultaneously. It was necessary to switch sections using a special lever. Even a modern telephone is often equipped with an FM button... Can you guess why the TV doesn’t see HDMI? Go ahead. The back of a TV typically contains half a dozen output jacks. Among the troops we will find a “tulip” formed by three petals, at times VGA puffs up, and certainly HDMI. Traditionally, the list is not limited to a meager list; see the instructions for more details. From the remote control, with the elusive press of a button (with only one HDMI port), you can select a source from the menu. The selection tool can be the Source key. You need to find a menu listing sources, select the cable connection port. There can be more than two HDMI connectors; it is important to track the correct number.

The computer usually avoids such tricks. There is no direct option to select the direction of signal transmission. However:

On laptops, the function keys Fn+F3 (F4) will open a pop-up system menu listing interesting options:

Computer only. The image will not be sent to the external monitor (TV). Most people choose the named option. Don't be surprised that the TV can't see the laptop.
Duplicate. The laptop screen will be duplicated by the TV. This is what most people need.
Expand. Some people like to drag player and browser windows onto the TV, making it more convenient to watch movies. Let's be afraid to judge (tastes are individual), select the Expand option, lengthening the desktop.
Projector only. The laptop screen turns off. The image will be displayed individually on the TV.

Desktop personal computers detect TV independently. Otherwise, take the trouble to visit the driver menu and select the required broadcast port.

It is easier to control a connected TV using the desktop context menu. First, right-click on the free space, select the Screen Resolution option. Successful TV detection makes the “Multiple Monitors” button available. You will see four options that are exactly the same as the laptop options. Read the values above. It happens that the computer does not see the TV via HDMI: it makes sense to look here and look at the context menu. The monitors will be numbered; you can swap ports by simply clicking and selecting the object for changing system parameters.

There is no “Multiple Monitors” button in case of inconsistency: the system does not see the TV. Both devices must be turned on (230 volt power supply).

We connect the TV and computer with a cable

Pros say: it is possible to hot-connect a TV and computer via HDMI. Avoid risking expensive equipment; perform procedures in the absence of power. The first thing you need to do is turn on the TV. In normal mode, devices see each other. Problems mean there is a breakdown. Is hot plugging possible or not?

What is HDMI?

Connecting the TV

There are the following basic ways to connect a TV to a monitor:

Turn on devices

The TV can always be transformed into a powerful multimedia platform if you turn on all devices in the correct sequence.

The connection algorithm is as follows:

The sequence of operations must not be changed under any circumstances. After connecting the devices, they need to be configured.

How to set up your display

The Windows 8 and 7 operating systems themselves detect the device and configure the connection if an HDMI cable is used. When using other connection methods, you need to know how to configure the image output to the display yourself.

The algorithm for displaying images on the display in Windows 7 and 8 systems is as follows:

Setting up the display in the Windows XP operating system is always done manually. You will have to press the buttons a little and switch the TV to AV mode.

Setting up the video card

After the connection is made correctly, a picture from the computer should appear on the TV screen. If the image does not appear, you need to adjust the inputs and outputs and adjust the resolution.

The video card is responsible for all visual effects and display of multimedia files on the computer. Each model has its own characteristics that should be taken into account when setting up.

But the general algorithm of actions will always remain unchanged:

Successful completion of the connection of two devices will be indicated by a system message about the use of an additional screen.

Outputting sound to TV

Playback of multimedia files will be complete only after setting up the sound card. If you don't do this, then you'll just end up in the silent film era.

Sound output to the TV is carried out according to the following plan:

If after making all the settings nothing plays, you need to pay attention to whether the video card even supports your sound output method.

What to do if the computer does not see the TV via HDMI?

Diagnosing problems includes the following steps:

step one: check the HDMI cable for serviceability and correct connection;
step two: check the system settings and working with a computer via an HDMI cable in the TV menu;
step three: reinstall the video card drivers.

Video: computer does not see TV

Possible reasons

The disease can be cured if you know the causes of its occurrence. Problems connecting your TV to your computer can be resolved if you know what caused them.

The main reasons why the computer does not see the TV:

the connection cable is damaged, incorrectly connected or defective;
the computer does not detect the TV;
the TV does not support the selected connection method;
video card drivers or lack thereof;
damage to interface ports;
the computer has a removable video card installed;
burning of internal parts of a TV or computer.

There can be many reasons for problems in the coordinated operation of two devices. If you are not a specialist, then you can confidently diagnose only external problems associated with the cable.

Solving the problem

Knowing the causes of the main violations in the symbiosis of a computer and TV, any problem can be eliminated.

Troubleshooting algorithm:

You shouldn’t try to fix problems on your own that only a professional can handle. But basic mechanical restorations are within the competence of any PC user. Do you really need to contact a technician to correct the position of the cable?

No signal from computer to TV

Photo: connecting a TV to a video card

Checking the signal through different connections

Through trial and error you can achieve the truth. If after all your efforts you are unable to resolve the connection problems, you can check the signal using different connection methods.

The due diligence process is as follows: