The computer does not see hdmi windows 7. Why the TV does not see HDMI

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

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


Common causes of poor connection

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

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

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

Equipment verification steps

  1. First of all, you need to check the quality of the wire connection and the condition of the connectors.
  2. Next, you need to check the correctness of the computer settings.
  3. Then the updated drivers and graphics card settings are checked.
  4. Launch an antivirus program to scan for malware.
  5. Port check. It is recommended to connect to a different device.

Cable check

If the TV connected to the PC suddenly stopped working, and until that moment everything was set up properly, it means that the cable came off or was interrupted. The first option is more common, since you can hook the adapter just 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.

TV settings

When the TV does not see the laptop via HDMI immediately after connecting the equipment, it is most likely that the wrong source is selected 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" on the TV from LG. Go into 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 the diagnostics further.

Monitor settings

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

  1. Move the mouse over any free space on the screen and press the right button.
  2. In the list that appears, select "Screen resolution" or " Graphic characteristics"Depending on the type of OS.
  3. Choose the appropriate option for displaying the picture on TV. The device passport contains a valid permission, adhere to it.


It's easier to do everything on a laptop. Press the "Fm" and F4 buttons at the same time, hold until the optimal option is selected. After that, the laptop will connect to the TV correctly and the error that there is no image will go away.

Graphics 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 eliminate it, you need to try to install new drivers that are available on the global network for each device model. Sometimes a complete reinstallation or replacement of an item may be required.

Details Questions and answers

There can be many reasons why there is no picture on the TV when connecting a computer via HDMI. We will try to consider the most common ones.

TV input setting

First of all, you should go to the TV menu and check if the HDMI port to which the cable was connected is selected as the input source. There can 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 external source selection button on the TV remote control. This can be a Source, Input, or HDMI button (each manufacturer has a different designation).

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

Setting up a computer video card

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

To fix the problem, right-click an empty area on the computer desktop. In the drop-down list, find the item "Screen resolution" (for Win7) or "Graphic characteristics" (for WinXP). A special menu will open, in which you can choose the options for using the main and additional monitors that suit you. The most convenient option is to clone (duplicate) TV screens and a computer monitor. After pressing the 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 easier: you need to simultaneously press the two function buttons Fn + F4 on the keyboard several times until the option that suits you appears. Instead of F4, another button can be used, on which an icon with one or two monitors should be applied.

Mechanical breakdown

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 safe from factory defects, so in case of problems with the connection, be sure to check the serviceability of the HDMI cable. The easiest way is to check the cable by replacing it with a guaranteed working analog, 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 can burn out due to static electricity problems. Although the HDMI standard supports "hot plugging" of equipment, but due to the lack of normal grounding in most of our household appliances, the HDMI ports remain lit. Therefore, experienced masters advise to completely de-energize the equipment before connecting the HDMI cable, and additionally remove the antenna plug from the TV.

IN modern world high digital technologies, it is often 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. Let's consider the most common causes of such problems:

  • The cable used to connect the TV is broken or damaged. This can happen with both a previously used cable and a new one, do not forget about the likelihood of a factory defect. The most simple solution will replace the connecting cable.
  • The cable is definitely working, but the TV does not work with the computer, and the computer does not detect the TV. The TV menu may not be configured to work with a computer via VGA or HDMI connections... The computer may have problems with the 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 different ways connecting external devices.
  • A TV connected to a computer gives out some signs that it is connected to a device, the computer also reacts in this way, but the devices still do not work together. Again, the reason may be the video card drivers or their absence. In this case, check the availability latest versions 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 the settings of your video card.
  • The TV and computer worked normally for a long time, but at some point they stopped cooperating adequately. In this case, there may be different options for work, for example, both the computer and the TV are detected, but do not work; only one of the devices defines the other; neither device detects another. There are several reasons for this situation:
    • break in 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 a lack of power or the 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 assumes additional power, which for some reason was not connected at the time of collecting the computer. It becomes clear that working with an external device requires additional power supply, and the video card is not capable of operating at full capacity.

A rough description of common problems will help you navigate the current situation and try various options for resolving it. However, if you are not a big expert in electronics, it is recommended to limit yourself to testing the HDMI or VGA connection cable. If this operation does not help, it is best to call professional telemasters 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 eliminate it right at your home.

The topic of the conversation should rather be 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. Recall: HDMI is a high-performance digital interface for transferring media content. Images, music, and other entertainment content. Will it be possible to listen to music on the TV? From home theater it will be possible, there is one! The HDMI port was invented as a high-performance means of transferring information. Let's skip a few words, find out why the TV does not see HDMI, how to fix it.

Connecting a TV to a Computer HDMI

We connect the TV correctly using HDMI

Home theater owners need to know the truth - the digital media device has a playback source menu. The easiest way to illustrate the fact is on old music centers. Traditionally, the devices had three blocks:

  1. Cassette decks: recording, reproducing.
  2. Radio receiving broadcast.
  3. Laser discs.

Moreover, the blocks refused to play the melodies at the same time. It was necessary to switch the section with a special lever. Even a modern phone is often equipped with an FM button ... Didn't guess why the TV can't see HDMI? Move on. The rear of a TV usually contains half a dozen output connectors. Between the troops we will find a "tulip" formed by three petals, from time to time VGA bulges, certainly - HDMI. Traditionally, the list is not limited to a meager list, see the instructions for more details. With the remote control subtly pressing a button (with a single HDMI port), the menu can select the source. The selection tool can be the Source key. You need to find the menu listing the 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. But:


  • In laptops, the function keys Fn + F3 (F4) will open a pop-up system menu listing curious options:
  1. Only a computer. Picture external monitor (TV) will not arrive. Most people choose the named option. Don't be surprised if your laptop can't see the TV.
  2. Duplicate. The laptop screen will be duplicated by the TV. This is what most people need.
  3. Expand. Some people like to drag the windows of players, browsers to the TV, it is more convenient to watch movies. Afraid to judge (tastes are individual), select the Extend by lengthening the desktop option.
  4. Only a projector. The laptop screen turns off. The image will be output individually to the TV.
  • Desktop personal computers determine the TV independently. Otherwise, take the trouble to visit the driver menu, select the required broadcast port.

Controlling the connected TV is easier through the desktop context menu. First, right-click the free space, select the Screen Resolution option. A successful TV definition makes the Multiple Monitors button available. You will see four options that are exactly the same as the laptop options. Read the values \u200b\u200babove. It happens that the computer does not see the TV via HDMI: it makes sense to look here, examine the context menu. Monitors will be numbered with numbers, you can swap ports, just click, selecting the object to change system parameters.

Buttons "Multiple monitors" are not available in case of mismatch: the system does not see the TV. Both devices must be switched on (230 volt mains supply).

We connect the TV and the computer with a cable

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

Here is the Wikipedia page http://en.wikipedia.org/wiki/HDMI, in the specifications of the standard there is the phrase Hot Pluggable: Yes. Translating into Russian, we see the docking of the connectors when the power is on. Want to play it safe? Russia is a place where dealers and manufacturers fulfill the prescriptions selectively. It's a pity for the equipment - play it safe.

Where to start connecting the cable? No difference.

Sound. Connecting a TV to a Computer HDMI

From the very moment of its creation by the committee (2002), the HDMI interface was conceived as a combined solution for image and sound transmission. See available audio formats individually (Wikipedia page), just note that in Windows you need to select a sound source. Now the TV is considered a system device, so these responsibilities can be assigned to it. To do this, the easiest way is to right-click the lower right corner of the desktop (speaker icon) with the right mouse button and select Playback Devices from the context menu. If there is no icon in the lower right corner, you need to press the arrow to the right of the RU (EN) language selection designation, to the left of the clock. The symbol will be there. You will find it.

After clicking, a window will open: playback devices will be listed. You need to turn off everything except the TV, and turn it on - the TV - on the contrary, use it. 90% of cases, in a couple of seconds, it is the native speakers of the plasma panel that will start screaming. Want Sound Around? Usually, such a speaker system comes with a home theater system. Flip through the product description. There are several ways to transfer sound from the TV to your home theater, any will work, given the condition that you need to purchase the right cable. Similarly, using the Source button on the home theater control panel, select the desired sound source.

On the TV side, the procedure is often transparent, with the device's own speakers turned off. Then put your anxiety aside if your movie accompaniment is recorded in mono. Every self-respecting home theater has a splitter inside that can easily split the sound into channels of the Sound Around format.

FAQ: Connecting a TV to a Computer HDMI

  • The TV does not see the HDMI cable. What to do?

Let's risk to assume: the source of the TV playback is indicated incorrectly. Check if the Target of the computer signal is correct. Use the remote control for the TV. Through the menu or the Source, or Hdmi keys, make sure that the source exactly matches the socket where the wire is plugged. For example, if it is HDMI 3, then HDMI 3 should be put in the menu. On the laptop side, use the Fn + F3 or F4 function key (differently on different models) to select the Duplication mode.


PC connection

Get comfortable first, then change as you see fit. A similar action is performed on a stationary computer, through the context menu of the desktop (column "Change resolution"), both devices must be turned on.

  • Across hDMI cable there is no sound on the TV, there is a picture, what should I do?

Audio stream output device is set incorrectly personal computer... Click the speaker icon (bottom right of the screen). Eliminate the problem by clicking Playback Devices. In the window that opens, turn off the playback devices, excluding the TV speakers. If necessary, also make the instance active (the line will turn green).

  • The TV stopped seeing HDMI.

We would venture to assume that the breakdown was preceded by a change of equipment. A new video card is installed. Seeing this outcome, the TV could reset the settings. Start over. See the guide above. Check the signal source, destination. Any parameters related to sound, image.

  • The laptop cannot see the TV via HDMI.

You need to select the correct TV output source. The switched on devices should see each other. There is evidence that cables of different versions of standards are incompatible with equipment. In the presence of v1.3, the technique worked, the replacement of v1.4 provoked the disappearance of the picture. Sometimes setting up a video card requires adding a second monitor manually. Relevant regarding desktop computers.

You see: there are few reasons (the TV cannot see HDMI). Mainly equipment setup. Experts recommend installing a new TV firmware, after turning off the device, a pause of 5 minutes. You can restart the product manually (the menu will help), for each model the exact sequence of actions will be different: LG, Sony, Samsung - the device demonstrates its peculiarities. Follow the guidelines. Farewell advice. Be sure to try alternately the ports of the TV, changing the image source through the menu. There were cases when only one of the four HDMI jacks worked, for example, the fourth. If we watch movies, there is no difference, number 1, 2, 3 ...

Readers should understand: Windows is not perfect. For the equipment to work, you have to reboot the devices several times. It happens that the pros ask why digital technology failed? Well done shrugs, says Windows - Must Die, Linux - well done. We find it difficult to say what the phrase means, but for some reason the problems on the forums relate specifically to the paid one operating systemrather than freely redistributable. We want to say goodbye, because the problem has stopped. We see no reason to discuss further.



We recommend reading