Today, any user using an HDMI cable can, as well as a desktop computer, to a flat-screen LCD TV, and then enjoy an expanded image. Such a connection is not always successful: for example, it can. But there are times when the computer does not see the TV connected via HDMI at all, although you just purchased the wire in the store, where it was tested in various ways. There are many reasons for the cable malfunctioning, and the search for the true problem must be done consistently.
What should be done if the TV cannot see the laptop via HDMI? Video cards of all modern products support such a connection: HDMI is installed on the TV on almost every model. If the laptop was connected in accordance with all the rules, but still there is 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 assembled by hand. When buying, the image quality and sound are checked, but they never check specific connectors and connection jacks on the TV - at best, they make sure they are available, and even then not all buyers. It often happens that the cable itself does not work, although it has not been used for so 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 in order to recognize similar signals.
Checking the signal source
On the remote control (RC), press the button to select the external input option. The specific model of 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... We select and confirm by pressing OK or Enter, it is the desired input, into which the cable from the laptop was previously connected.
Working with the monitor
If the laptop does not see the TV when multiple monitors are connected at the same time, then it is necessary to carry out additional settings... These simple manipulations can be performed by any user without special education:
- hover the cursor over any free space on the desktop;
- for the menu to appear, click on the right mouse button;
- we find the section "screen resolution" - Windows 7, and if there is WindowsXP, then "graphic characteristics";
- then you need to choose 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 starts to see the TV.
Graphics 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 does not 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 can establish the required connection.
Perhaps the fault lies in the fact that the operating system was infected with viruses or there was an unauthorized entry of malware. Using a powerful antivirus (computer protection program) capable of finding all spyware of any level, we thoroughly scan your computer and reconnect.
Some experts strongly advise you to check the version for your Smart TV platform: sometimes a laptop cannot be connected via HDMI for this very reason. and maybe the problem will go away.
Connection port malfunction
Any connector can have mechanical damage or burn out during a power surge, which are not uncommon in our electrical networks. Experienced craftsmen advise connecting the HDMI cable when disconnected devices, even the antenna cable is recommended to be disconnected 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.
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 the elimination of various violations is already a solvable task. This is how the approximate procedure for eliminating the detected faults looks like:
- Check the quality of the connection, visually check the external condition of each connector or connecting cables, if the laptop stopped seeing the TV.
- Then the configuration of the computer systems is checked: check what selection was made in the menu items responsible for connecting devices.
- Check for updated graphics card drivers.
- In some cases, it doesn't hurt to check the settings of the video card itself once again.
- Re-scan the entire computer with a Smart Scan to ensure no malware.
- Check visually the condition of the multimedia ports, their proper operation - a positive result will be immediately visible when connected to another device, for example,.
If you have tried your best and the laptop still has no signal to the TV, try other connections. Use the rule of thumb when all existing connection methods are used consistently. The due diligence process will look like this:
- first, we determine the available connections and connectors that are used by our selected household appliances;
- disconnect TV and laptop from the network;
- we 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 should be displayed on the TV screen, similar to the loading of the operating system;
- no signal - go to the "Device Manager" section, find out what active types of connection are available;
- if it is possible to install VGA connection, then you need to connect a similar cable to the products;
- then we carry out similar actions as with HDMI, only press the "VGA" button on the remote control;
- if you decide to make a connection via DVI, then we connect the cable to the corresponding connectors, select the same option in the TV settings.
If the technician did not start working together, the reason lies in an internal breakdown, which can only be diagnosed and eliminated by a master. Of course, if you have knowledge of the electronic stuffing of devices, you can give it a try.
Synchronization of the TV and computer allows you to significantly expand the functionality of the equipment. The user will be able to run video games on the big screen, watch movies, series and TV shows. There are several connection methods, but HDMI remains the priority option. In some situations, the computer cannot see the TV via HDMI. What is causing this problem? There are several options. Now let's look at each of them, and also provide useful recommendations for reconnecting.
HDMI stands for High Definition Multimedia Interface. It is a state-of-the-art connector that transmits audio and video at the same time. Almost all equipment is equipped with this interface. "Tulip" and other cables popular in the past are designed to transmit an analog signal. HDMI cable transmits content in digital content with Full HD or 4K resolution (depending on version).
Therefore, if you need to connect a computer to the TV screen, then it is best to use this particular interface. The connector provides the highest quality data transmission with the lowest latency. Unlike other wires, HDMI transmits sound and picture to the TV at the same time.
The HDMI interface was introduced back in 2002. Since that time, the developers have released many different modifications. They gradually increase the carrying capacity of the cord. The developers try to timely add support for popular formats and many other useful features.
HDMI versions over 1.4 support internet signal transmission, 3D and 4K resolution. The HDMI internet connection differs from Wi-Fi wireless technology in its increased data transfer speed and a more stable and reliable signal. The most popular HDMI form factors are:
- type A - classic version;
- type C - mini HDMI;
- Type D - micro HDMI.
The last two types are designed to connect mobile phones, cameras and other portable devices. What causes wire breakage? Mainly short circuits and mechanical damage.
Causes of malfunctions and their elimination
Why can't my computer or laptop see the TV? There are several reasons. Let's list the most popular ones:
- the equipment is connected incorrectly;
- damaged HDMI cable;
- the interface on the PC, laptop or TV is faulty;
- problems with video card drivers;
- incorrect monitor settings;
- Incorrect settings on the TV
- the GPU processor of a computer or laptop is out of order.
Now let's take a closer look at why the connection of the computer to the TV does not work. The main stages of equipment diagnostics:
- Assessment of the correctness of the connection diagram and visual inspection of the integrity of the wires.
- Checking computer and TV settings.
- Testing the computer's operating system for viruses.
- Port health diagnostics by connecting to other devices.
- Check for updates for the video card driver.
Now let's take a closer look at why the TV does not find a PC or laptop. We will offer useful troubleshooting tips.
Broken cable
In situations where the image was transmitted correctly from a laptop connected to a TV, and then the synchronization was interrupted, you need to start by checking the integrity of the cable. The plug may have come off or the wire has been broken. Most of the problems arise precisely because the plug comes off. This could even happen due to the fact that the user just passed by. Mechanical damage to the cord is less common. Cables come in different lengths. Therefore, users have the opportunity to choose the best option for themselves. This eliminates interruptions.
If the laptop is connected to the TV, and there is still no picture, then first check if the plugs are correctly inserted into the connectors. If the TV cannot see from the TV, try a different cord. It cannot be ruled out that connection failures were caused by damage to the wire.
TV not tuned
Some TV models do not have an option to automatically detect the signal source. Especially if the TV synchronization with other devices has been previously configured. In situations where, when connected via HDMI, the TV does not see the laptop or computer, take the remote control, and then select the list of available signal sources. Select "HDMI" from the list provided.
If the signal was not detected automatically when the cable was connected, then all the work must be done manually. Step-by-step algorithm of actions:
Remote controls for many modern TVs have a button "HDMI"... This means that you can ignore the second point of this instruction. Just press this key. As a result, it will switch to this signal source. Select the required port beforehand. How to do this is described in the third and fourth paragraphs of the instructions.
If you have any difficulties in the process of selecting a signal source, carefully study the instructions that came with your TV. It describes in detail the process of connecting additional devices using the HDMI connector.
Incorrect monitor settings
If there are no problems with signal transmission, then you need to diagnose the settings of the laptop or computer. Very often, the computer does not see the TV via HDMI precisely because of incorrect system parameters. No special knowledge is required for this. It is enough just to follow a simple instruction:
- Move the mouse over the free space of the screen, and then right-click.
- In the context menu that appears, select "Screen resolution"... This item is sometimes called "Graphic characteristics"... It all depends on the version of the operating system.
- Choose the best way to display your picture on a large TV screen. Adhere to the resolution stated in the TV specifications.
The settings panel is much easier to turn on on the laptop. Hold down the Fn + F4 key combination. Hold this combination until the optimal resolution is automatically determined. As soon as the laptop or PC goes into sleep mode, the image will go blank. Therefore, it is better to turn off automatic sleep in order to establish an uninterrupted connection with the TV.
Video card problem
Broken video card is another common reason why the TV stopped seeing a laptop or PC. An inscription appeared on the screen « » what to do in such situations? To fix the problem, you need to update the drivers. Finding them on the Internet will not be difficult. You can download the update package from the official website of the GPU processor manufacturer.
You need to start by examining the technical parameters of the video card. The fact is that not all graphics modules support the option to display images on multiple monitors. You can familiarize yourself with such characteristics in the documentation that comes with the video card. If all documents have been lost, then you can use special software.
To update the drivers for the GPU adapter, follow the step-by-step instructions:
As noted earlier, you can also download the drivers yourself. Don't download files from unverified sources. Download updates exclusively from the official portal of the video card manufacturer. Installation is carried out through an automated installer. Therefore, there should be no problems.
Inoperative connection port
Absolutely all connectors are susceptible to mechanical damage and short circuits, as a result of which the contacts burn out. Therefore, inaccuracy of the user or a sudden power surge can also lead to the fact that the computer does not see the TV. Experienced experts strongly advise connecting the HDMI cable only on condition that all equipment is de-energized.
Over time, the HDMI output pad on your computer will oxidize. Because of this, the device does not detect the connection. Contact the service center for qualified engineers to re-solder the damaged contacts, thereby restoring the functionality of the connector.
In some situations, connection problems arise due to the fact that the video card is not equipped with an additional power supply. Therefore, no synchronization takes place. It will be extremely difficult for an ordinary user to check the functionality of the connection. It is extremely important to first analyze the features of the graphics adapter.
Viruses on the computer
Sometimes the laptop does not see the TV via HDMI due to the presence of viruses or malware on the laptop. Such a problem occurs extremely rarely, but in no case can this cause be completely ruled out.
To increase the level of protection of your PC or laptop, download an antivirus. You don't have to buy a license at all. At first, you can get by with the free version, the action of which is limited in time - on average about 30 days. As an example, consider the process of starting a scan using Kaspersky Anti-Virus:
- Activate the program, and then start the scan command by clicking on the corresponding icon.
- Select the type of check - "Full check", and then click on the button "Start check".
- A comprehensive scan of the operating system for viruses can take about 2-3 hours. If the antivirus finds malicious applications or infected files, this will be reported in the scan report.
Difficulties in the process of setting up a PC and TV connection via HDMI arise extremely rarely, but if problems appear, then they can be solved by our own efforts. The only exception is broken ports. Replacing the HDMI interface or re-soldering the contact pad without professional equipment will not work.
There are various ways to connect your computer or laptop to your TV. One of them is the use of HDMI. Have you installed the equipment, prepared the device for output, but the TV does not want to broadcast the picture from the screen? The article analyzes the problems with connecting the cable to the computer and provides instructions for fixing the problem.
Diagnostics
If your TV does not see the device connected via HDMI, and the screen says that there is no connection, then simple instructions will help you solve the problem.
The kind of error displayed on the TV screen may differ depending on the model and brand.
Cable check
First of all, exclude the possibility of damage to the cable itself. To do this, connect the wire to another device and check the image output. You will immediately find the cause of the problem or narrow down the troubleshooting area. If the cable does not work with other equipment, the recommendation is obvious - you need to purchase a new one. If everything works, then it is worth checking whether the correct signal source on the TV is selected:
- Find the external input option button on the TV remote control. The most common: HDMI, source and input.
- Go to the menu.
- Now you need to select the input to which you previously connected the cable and confirm the action.
Check the number of the slot to which the cable is connected
Check monitor support on laptop
The problem can occur if the monitor of a laptop or computer is set as the primary monitor. To change the main output device, you need to go to the settings on the PC itself.
Windows 8
To set up Windows 8, follow these steps:
Windows 7
In Windows 7, in addition to the method of connecting through the control panel, there is a special program that comes with the system:
Windows 10
To set up TV out in Windows 10, follow these steps:
Windows XP
Despite the fact that support for this OS has long been discontinued, you can still connect modern TVs to it:
Mac OSX
Connect to Mac OSX using a dedicated Belkin Mini DisplayPort to HDMI cable.
The Belkin cable is available from any Apple retailer.
As in other systems, it is possible to select the required monitors and their number: built-in and / or external. There are three monitor modes on Apple. We are interested in the extended desktop:
Linux
We will look at the instructions for the most popular distribution - Ubuntu:
Checking the video card
Quite often, the problem with displaying an image on the screen is the outdated software of the video card we are connecting to. To eliminate this problem, you need to install the latest driver. But first you need to find out the exact name of the video card model.
On Windows
We will look for information about the video card in the "Device Manager". To enter it, use the universal method that works on any OS version:
On Mac OSX
On a Mac OSX computer, the algorithm is approximately the same:
On Linux
The easiest way to find out information in this system is through the terminal:
Driver update
Now we have information about the video card model. We follow the instructions common to all systems:
- Go to the official website of the video card manufacturer.
- Select your model through the search and download the driver.
- Install them. You may need to restart your computer.
Checking the health of the HDMI port on a TV and laptop
Examine the HDMI connector. It should not be severely damaged, metal parts should not be broken or bent. If the port is damaged, you will need professional help to replace it.
The connector can break if used improperly: pulling the wire too abruptly, trying to connect the wrong cord, and so on.
The easiest way to accurately determine the health of a port is using an HDMI cable that you are sure is working properly. So if you have one on hand, take advantage of it.
Checking the connectivity through other connectors
If the TV does not display an image due to a damaged HDMI port, it is not necessary to immediately contact a service center. If the other ports are working, you can purchase an adapter and connect it to the corresponding socket.
Types of adapters
Adapters are of the following types:
Audio playback problems
If the device is connected and works, but the connected TV does not play audio, then this may have two reasons. Maybe you are using an adapter to connect HDMI to an external monitor that is not equipped with an audio interface. In this case, the solution is obvious - change the adapter. But more often than not, the problem with playing audio on an external device is incorrect hardware configuration.
Windows 7 and 8
The setup on these two Windows versions is identical:
Windows 10
To set up audio output on Windows 10:
Windows XP
In Windows XP, setup is done as follows:
Mac OSX
Setting up on a Mac is done like this:
Linux
Most distributions use Pulseaudio Volume Control software. Use the program to customize the audio output as follows:
Correcting errors when connecting HDMI is a simple matter if you have clear and accessible step-by-step instructions before your eyes. Now, technical problems will not be able to spoil your pleasant evening in the company of your favorite films or TV series.
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 connected according to the instructions. There may be several reasons for this state of affairs, so the search for the problem should be carried out 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 properly. Even very expensive brands are not immune from such a thing as a factory defect. In addition, due to careless use, the cable can be damaged. You can check the HDMI cable by replacing it with a guaranteed working analog or by connecting 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 your TV remote control. Depending on the TV model, this can be a Source button, Input button, or just HDMI. Clicking on it will bring up a menu with a list of available inputs. Select and confirm with the Enter (OK) button the input where you plugged the HDMI cable.
3. Check if the mode of operation with an external monitor (in this case, a TV) is selected correctly on your computer. 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 should be made.
In the desktop, you will need to right-click on an empty area of the desktop, then go to the menu "Screen resolution" (for Win7) or "Graphics characteristics" (WinXP) and select the option of duplicating screens. For laptops, there is a special function button at the top of the keyboard with a monitor icon (usually F4). 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 current drivers for your graphics card. In the Device Manager of your computer, determine the version of the video card driver you are using. On the official website of the video card manufacturer, find the most current driver versions 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 Smart TV operating platform.
5. Check your computer's operating system for infection with viruses and malware. You should scan your computer with any effective antivirus program with fresh signatures.
6. Check if the HDMI ports on the TV and external signal source are working. Connectors can burn out or be mechanically damaged due to repeated disturbance of the cable connection order. Although the HDMI standard allows hot plugging of the cable, experienced experts recommend not only turning off both devices from the sockets at the time of switching, but also disconnecting the antenna cable from the TV socket.
Another rather exotic reason why the TV cannot see the computer through the HDMI connection is the lack of additional power supply on the discrete video card used in it, and working with an external device requires increased energy costs.
If the materials in this article did not help you solve your question, ask it on our forum.
In some cases, after connecting the TV to a computer or laptop via an HDMI cable, the image simply does not appear on the TV. Rarely, but it also happens that there is sound via HDMI, but there is no picture on the TV. Although, it seems to me that most often they are faced with the opposite problem when.
In this article, we will try to deal exclusively with the problem of image output via HDMI cable. It seems that everything is simple there, we connected the TV to the computer, selected the desired input on the TV, and if necessary, then on the computer we also select the required image output mode. And according to the idea, everything should already work. And instead we see the inscription "No signal" on the TV.
Before moving on to any tips, check out the instructions for connecting your TV to your computer via HDMI:
- And another one . For example, Philips TV and Windows 10.
If you are doing everything according to the instructions, but there is no result, and the image has not appeared on the TV, then now we will figure it out.
There is no signal on the TV via HDMI, and there is no picture
1 The first step is to check cable connection, and remember the HDMI input number on the TV to which the cable is connected. Check if the cable is well plugged into the outlet on a laptop or desktop computer. Then, check the cable connection on the TV, and be sure to check which HDMI input you connected the cable to. They are signed. It looks like this:
For example, I connected the cable to the HDMI input under number 3. The fact is that the TV is likely to have several inputs. And in the settings we will need to select the one to which we connected the cable.
2 Checking the settings on the TV. We select the appropriate HDMI input in the settings. Not always, after connecting the cable, an image from the computer immediately appears on the TV. Most likely, you will see the inscription "No signal", or "Cable not connected". There should be a button on the remote control from your TV that opens a menu with a choice of signal sources. On Philips TVs, for example, this button is labeled as SOURCES... Click on it and select the HDMI input with the desired number from the list.
On LG TVs, this is the button INPUT... Click on it and select the required source. On the new LG TVs on Web OS, it may have already done something differently. But, the scheme is always the same on any TV (Samsung, SONY, LG): open the menu with the choice of the signal source, and select the HDMI input with the desired number (to which the cable is connected).
3 Checking the settings on the computer. The computer may have turned off image output to the projector (TV, monitor), so the picture does not appear on the TV and there is no signal. It's very easy to check. In Windows 10, Windows 8 and Windows 10, just press the keyboard shortcut Win + P, and select one of three options for image output: Duplicate, Extend, Projector only.
If you have selected "Disconnect projector", then HDMI image will not be output. In Windows 10, everything is about the same, only there a menu appears on the side of the screen.
4 If you still did not manage to make friends between the computer and the TV, then it would be good to find out what the reason is: in the TV, in the computer, or in the cable. This is not difficult to do. Especially if you have another PC, TV, monitor with HDMI input, or one more cable.
Try connecting your laptop to another TV or monitor, for example. If everything works, then the problem is in your TV (which is unlikely). This will eliminate cable problems. Also, you can just take another laptop. (even borrow from a neighbor) and connect it to a TV that does not output an image. If everything works, then the problem is in your laptop (computer). Which is most often the case.
5 One more tip. Try updating the video card driver with your HDMI-connected TV. Just download the driver from the laptop / video card manufacturer's website and install it.
6 Update: Andrey shared one interesting solution in the comments. After connecting the TV to the laptop, the TV had a "No Signal" error. But the laptop saw two monitors (built-in and TV)... Changing the frequency for the second screen (TV) helped. I decided to add this solution to the article, and show in more detail how to do it.Windows 10
We open the screen parameters and see that there are two displays.
Scroll down the settings page and open "Advanced display settings".
We look closely. There will be "Display 1" and "Display 2". Near one of the bottom may be the name of your TV. I now have one display inactive, since the image is displayed only on the second display. Press "Display adapter properties ..."... You need to open the properties of the TV.
In a new window, on the "Monitor" tab in the "Screen refresh rate" menu, set 60 Hz. Click "Apply".
After that, the error "No signal" on the TV should disappear. An image from a computer connected via HDMI appears. For some reason, Andrey's system set the TV frequency to 25 Hz.
Windows 7
Right-click on an empty area of the desktop and open "Screen Resolution". The TV must be selected in the "Screen" menu. Let me remind you that this method can be applied only when Windows sees a TV connected via HDMI, but does not display an image.
Go to "Advanced Options" and under the "Monitor" tab select 60Hz. Apply the settings.
If this method worked, write about it in the comments.
7 Update: disconnect everything unnecessary from the TV. For example, an AV cable (tulip). Another device that can also be connected via HDMI. There is information in the comments that unplugging the hard drive from the USB port helped! eight Update: if you have an LG TV (this might apply to other TVs as well), then turn off the "Quick start" and the "SIMPLINK" function in the settings.
There are reviews that this helped.
What should I do if my computer does not output an image via HDMI to the TV?
When we determined that the problem is in the computer, or laptop.
The image is displayed by the video card, we actually connect to it. This means that the problem may be in her. Yes, it is possible that something burned out there, etc. But, as a rule, it is a software problem. Something with the driver of the video card, or with the settings, so the image via HDMI does not go.
Therefore, the first thing I advise is to update the video adapter driver. If you have a laptop, then go to the manufacturer's official website, find your model through the search, select the operating system that you have installed, and download the VGA driver. Then, run the installation.
If your laptop has two video adapters, then update the drivers for both. Maybe for example nVidia Graphics Driver, and Intel Graphics Driver as on my ASUS laptop.
And if you have a stationary computer, then download the driver from the video card manufacturer's website. Which video card is installed, you can see in the device manager, or in the characteristics of the system unit.
If you somehow managed to solve the problem with the image output to the TV using an HDMI cable in a different way, then share your advice in the comments. I will be grateful.
