Today any user HDMI help cable can connect your laptop as well as desktop computer to your LCD flat screen TV and then enjoy the enhanced picture. 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 the cable was just purchased at the store. There are many reasons for cable malfunction, and the search for the true problem must be done consistently.
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 On remote control control (remote control) press the button to select the external input option. From specific model The product depends on 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 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.
Connection port problem Any connector can have or get burned during a power surge, which is not uncommon in our electrical networks. Experienced technicians advise connecting the HDMI cable when devices disconnected from the network, it is recommended to even disconnect the antenna cable during 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.
Image output settings in Windows
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 operating system settings. How to properly configure the system for different versions OS, described below.
Windows 7.
- On the desktop, you need to open the task menu and find the “screen resolution” item.
- Select “connect to a 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.
- Once you log into the control panel, select the “Design and Personalization” submenu.
- In the “display” section we find “multiple displays” and select “duplicate” or “extend the table to only the second display”.
Windows 10
- In the screen options, select “display” and scroll down to “multiple displays”.
- If all connections are made correctly, the second screen will be immediately displayed, all that remains is to indicate exactly how to use it - duplicating it or as the main one.
Setting resolution and frequency
Sometimes, after following the recommendations listed above, the picture still does not appear. 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 video card is too high. In this case, you should go into the screen settings using the above algorithms and, selecting the second display (TV), lower the resolution for it.
The second reason that may affect the image is frequency. By default, the PC video card is set to 60 Hz. For TV it is worth trying to gradually reduce the value.
Important to remember! Some TV manufacturers provide connection to a PC, and there is a special mode for this. It can be combined with the image adjustment or separated. Through it you can select the appropriate resolution for your PC.
Some Samsung TVs I encountered a problem where a window with the text “HDMI mode is not supported” appeared. There were many recommendations on the forums to combat this, but it turned out that this is a problem with the factory firmware, and to eliminate the defect, you need to contact service center manufacturer where new software is installed. Modern Samsung TVs do not have such nuances.
How to update software on a video card
If connection difficulties continue after the recommendations above, updating the PC software associated with image output may help. The driver may be out of date, damaged, or simply missing. In such a situation, you should open the device manager and look at the “video adapters” tab. To do this, you need to select “manage” from the “my computer” icon in the menu, which opens by right-clicking on the mouse.
If near the adapter red or yellow icon is on, 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 DriverPack 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 were used, or the computer is not configured correctly.
- In the tray, you need to click on the sound settings icon and select “playback devices” for Windows 7 and 8 or open “sound settings” for version 10 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 as 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 is that 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. If the technique never started, 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.
I noticed that very often questions arise that arise when DLNA setup server on your computer to watch movies on a TV that supports DLNA.
Namely, questions about the problem when the TV does not see the DLNA server created on the computer. And accordingly, he does not see the files (films, photos, music) that are on the computer.
There can be many reasons why such a problem may appear. But, most likely, this is due to the fact that the antivirus or firewall installed on your computer (possibly standard Windows firewall) , blocks the connection. They prevent your TV from seeing movies that are on your computer.
Here are the actual instructions for setting up DLNA:
If you did everything according to the instructions, but your computer still doesn’t see the TV, then first:
- Make sure that the server is running on your computer (laptop). The program you use should write about this.
- Check if your TV supports DLNA technology. This can be found in the specifications of your TV model. (just look at the manufacturer's website). If your TV has a Smart TV function, then it supports DLNA.
- Make sure that your TV and computer are connected to the same router. And that the Internet works on both (internet access is not required, but this indicates that the devices are indeed connected to the network).
- If, for example, it didn’t work out with the “Smart Share” program, then try “ Home media server(UPnP, DLNA, HTTP).”
If everything is fine with the above points, then you need to try disabling the antivirus. I know for sure that Avast likes to block such connections. But other antiviruses are no exception. You should also try disabling the firewall if it is installed on your computer. AND .
There is no need to completely remove your antivirus. Almost every antivirus has the ability to completely disable protection for a while.
Typically, this can be done by pressing right click mouse on the antivirus icon in the notification bar, and selecting something like Pause protection.
This is how it is done in Kaspersky Internet Security:
Perhaps the antivirus will also ask you for how long to disable the protection, or ask you to confirm the disabling. Let me remind you that I showed the example of Kaspersky Internet Security. If you have a different antivirus, then things may be a little different.
After disabling the protection, go to the required menu on the TV (on LG, this is for example Smart Share) and see if your TV has seen the contents of your computer. You can also turn off and turn on the TV.
I'm sure everything will work out. If everything works and the TV displays folders or files that are on the laptop, then the problem really is with the antivirus.
Turning off the antivirus every time is also not an option. Therefore, you need to try adding your connection to the antivirus exceptions. Or, it may block the program itself, for example “Home Media Server (UPnP, DLNA, HTTP)”. In this case, the program must be added to the exceptions. Each antivirus does this differently. Look for something like: application control, application activity management, network activity, firewall.
As for the problems in themselves Wi-Fi routers, through which the devices are connected, then they have their own chips. In theory, there is no need to make any settings in the routers themselves. But, I saw advice in the comments that you can try unchecking the “Prohibit multicast” option on the tab where Wi-Fi settings are set.
Such a point, for example in Tp-Link routers, I haven't met. If your router settings have such an item, you can try it. Best wishes!
Good day!
There is no doubt that now one of the most universal and widespread interfaces for connecting TVs, monitors, and various set-top boxes to PCs (and laptops) is HDMI. Moreover, one cable is enough to simultaneously transmit high-quality image and audio signals. Comfortable!
Now closer to the topic... Many users connect HDMI devices with a cable without turning them off (this connection is called "hot") ! And because of this, in some cases, the HDMI port may burn out. Most often this happens when connecting a computer to a TV (less often to a monitor, and even less often to a video camera, for example). In some cases, not only the port burns out, but also the video card, motherboard etc. glands (you must agree, not the most pleasant situation).
Why is this happening?
The HDMI port may burn out. Why and how to prevent?
Many of our panel and brick houses have “problems” with grounding (not to mention small rural houses, where there are no projects at all...). For some reason, in our country few people give due attention to grounding...
So, if you (let’s say) have plasma TV, connected to such an outlet without grounding, then under a certain set of circumstances, it can induce a phase on HDMI cable. Because of this, if you do not carefully insert the connector when connecting, for example, you touch the outer contour of the plug while trying to get into the socket, then the device can “burn” (sometimes a small spark may “appear”).
I will also note that if the computer and TV are connected to different outlets, then even if they are both grounded, there may be such a thing as different “ground levels”. You may have even noticed how sometimes you were “beaten” by static (precisely, most often, because of this...).
HDMI burned out (such a case is still rare. Usually, after burning, HDMI looks the same as before... without external signs)
How to prevent this: In order to reduce the risk of burning something to a minimum, you need to follow a simple sequence.
- Before connecting/disconnecting via HDMI, completely turn off the computer (laptop) and TV (monitor);
- Next, disconnect the plugs from the sockets. If you are dealing with TV, then disconnect the antenna cable (if you have cable TV);
- connect the device's HDMI cable;
- reconnect the television cable to the TV;
- connect the devices to the power supply;
- turn it on.
However, I will add that if your sockets are not grounded, then even this method does not provide a 100% guarantee. A grounded outlet, a good surge protector, a high-quality HDMI cable, and a “cold” connection are perhaps the most reliable things that can prevent such a problem...
Important!
Please note that the HDMI cable may cause a fire! In some cases, the temperature at the ports (where the cable connects to the device) can reach temperatures that cause sparks and melt plastic. Several photos above are proof of this.
Diagnostics. What to do if HDMI doesn't work
It’s not at all a fact that if you don’t see an image on the screen when connecting via HDMI, it means something has burned out. For example, a black screen on TV may mean a simple lack of signal. Therefore, to begin with, it is recommended to pay attention to the points below.
1. Check the connectors and pay attention to the TV/monitor settings
The fact is that modern TVs quite often have several HDMI ports (2-3). So, it’s not at all uncommon for users to connect to one port and select another in the TV settings.
The classic TV menu is presented in the photo below: you can choose one of three HDMI ports, in addition, AV and Antenna TV are available.
In addition, check whether the cable is tightly inserted into the sockets of the PC and TV/monitor. Try reconnecting (not forgetting the first part of the article!) .
2. Check the integrity of the cable (use a similar one)
If your HDMI cable is old enough (and has not been handled very carefully, which is actually not uncommon), kinks (twisting) often occur and it no longer transmits the signal. Moreover, in appearance, “everything” may be relatively fine with it, but inside the copper veins have already been broken.
3. Checking and setting up your PC/laptop
Please note that when you connect 2 monitors to your computer (or a monitor and a TV, for example), you will have a special. menu where you can select the projection option:
- display the image on both screens;
- display the image only on one of the screens;
- make one common screen (see below).
Note! There is a special feature on laptops. The keys to call such a menu, for example, on ASUS are Fn+F8.
What I mean is that perhaps you have a setting in Windows that prohibits displaying the image on the second screen...
To help! How to connect a second monitor to a laptop -
4. Check the relevance of video drivers and their settings
The picture from the PC may not be “transferred” to the TV/second monitor due to problems with drivers (due to their absence, for example).
To help! How to update the driver on AMD video card, nVidia and Intel HD: from A to Z -
For example, in the IntelHD settings there is a special “Multiple Displays” section that will help you find and configure the connected device. If you have connection problems, I recommend checking it...
If HDMI still burns out, pay attention to other ports (analogues): for example, you may also have VGA, DVI, Display Port. What I mean is that you can (at least temporarily) use a different interface. It can help in cases where there are no spare parts for your equipment, or there are no funds for repairs yet.
Monitor connectors (VGA, DVI, HDMI, Display Port). What cable and adapter is needed to connect the monitor to a laptop or PC -
Best wishes!
In the era of high digital technology, we can get the best from TV and computer through their connected connection. Creating that special connection between technical devices possible with 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, standalone video players, as well as audio receivers for mobile devices And computer technology. If you would like to play a video or show photos on 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 is different from the other. functionality and scope of application.
It is also worth noting that recently the possibilities and advantages of wireless connection when connected via HDMI adapters.
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: The connection can be realized without using various types
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 Operating 8 and 7 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:
Display settings in operating system WindowsXP 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.
For all visual effects and demonstration multimedia files The video card in the computer is responsible. Each model has its own characteristics that should be taken into account when setting up.
But general algorithm actions will always remain the same:
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 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 model There is no way to connect a TV 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 to the video card and 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 cannot resolve the connection problems, you can check the signal different ways connections.
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.
Development of digital and multimedia technologies gave 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.
HDMI is a popular connection connector various equipment between themselves (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.
Produce HDMI check 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 proposed 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 you do not have any external displays connected to your computer other than your TV, then this method can be ignored, 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 mode "Display desktop 1:2". 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 able to support 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, 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.
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