What do I do if the HDMI cable fails?

HDMI has made viewing images easier by transmitting audio and video using a single cable, yet it hasn’t come far from trouble like any other technology. Therefore, if you have realized that it is giving you problems , it does not work, it fails, it seems that it does nothing or suddenly it has stopped working, we will tell you the main solutions to the problems that usually occur.

Initial checks

Connection failures or bad contacts are usually the main causes of image and video problems, so it is important that in case you do not know what is happening or want to make a first check, you pay attention to the HDMI and the cables are in good condition and perfectly connected. Check that the connector of the TV is intact, like the one that your cable, and also that it is perfectly clean. If it lacks cleaning, use compressed air for it, the cans are not excessively expensive and will serve you for other uses.

If it doesn’t work or has problems, try removing all the connections , waiting a few minutes, reattaching them carefully and making sure they are securely seated, and turning on the SMART TV. Sometimes this simple check solves many problems.

An interesting initial check is to try the other connector of the television, since televisions can frequently have more than one, to see if it works since in this case it could be due to the cable and you would have to change it for another or resort to other solutions .

Of course, first of all, you have to make sure that your TV is configured for the correct input port. It may happen that you have it to show the channels or your streaming account. Go to the TV remote and choose the port that you are going to connect on your TV. If you have more than one, verify that it is the one you are going to connect. Generally, this is usually the HDMI 1 input, although you may connect it to HDMI 2 or another, so pay attention to this aspect. You can find it on the remote in Sources , Fuentes or something similar.

Main problems

Once you have made the initial checks, we will tell you about some of the main problems that usually occur and what are their most frequent solutions, although it may be that one of them can solve another problem or that by doing the initial checks you have solved that when you HDMI fails . As these problems or errors tend to occur more frequently than desired, we tell you the first thing to do in each case, it may be that you will be fine with that.

Sound and image cuts

One of the most frequent problems that usually occur with this type of connectivity are sound or image problems. Suddenly you see cuts in the image, the screen is poorly visualized or the sound does not work as it should. This is usually due to a false contact or poor connection in the connector with the input. Check that it is well placed or that it did not move from its place. To do this, it is recommended that you remove it safely and replace it, making sure that it is well seated and that you do not force it.

If this does not solve the problem, it could be due to a damaged cable , so check that it is seated correctly, without being pulled or twisted or forced, and that it is not worn. This usually happens when some heavy things, such as furniture, are placed on top of it that end up damaging it.

Try another input , if your TV has one, to see if the problem is with the input and not the connector. Sometimes, due to frequent use of this, it can end up wearing out. It is used to make the check one that you do not use frequently you will be able to see if this is the problem.

Spots or poor sharpness

If what you are viewing has poor sharpness or spots, you should check the device settings to see if the image passes taking into account the native resolution of your television or higher. This is usually due to problems resolution .

You can also change the automatic TV resolution selection and choose it manually depending on the connected device. If you do not know what it is, check the box, instruction manual or look on the internet for the device model.

The signal may not arrive well even with a well connected cable, which we have already checked before, due to connectivity problems , so this makes it necessary to match the quality and aspect ratio of the TV with the connected device or computer.

Your new device does not appear

If you have bought a new device and it does not appear on your TV, this may be due to the HDCP, data protection system, or EDID, responsible for identifying the device.

In this case, what you should do is update the firmware of your device. This update can fix other issues, such as undefined resolution or colors. We assume that you have selected the same port on your SMART TV that you connect the device to, but look carefully that you have done so because sometimes there is confusion with the connector number.

Picture without sound

If the picture appears without sound when connecting the computer to the TV with HDMI, this is usually due to a software problem . Therefore, we recommend that you review the settings.

In Windows, you can go to Control Panel, Hardware, Sound, and Manage Audio Devices. Verify that the output  is enabled, and also check that your computer has volume and high enough. Make sure you have not accidentally turned off the sound on your TV.

Problems with a long cable

Problems with long cables should not have to occur if they are licensed as they have gone through all the test specs and quality checks. There are few cases in which these, near strong signal sources, could create interference.

Therefore, you should check the specifications, although if it is from an authorized manufacturer you should not have problems. If so, go to where you bought it to explain your case. The problems usually occur with manufacturers without a license or if you make your own to make it bigger, to save on your purchase.

Other checks

If the problem is not any of those named, or you are not completely clear, you can try other possible solutions to see if this stops failing or your HDMI finally works, since sometimes you can not detect what is happening and can be the simplest thing in the world. In other cases, the solution is more complex than it initially appeared. Therefore, we recommend that you try something else.

Hardware troubleshooting

If you are trying to connect your computer to your SMART TV and it does not work, you can try running the hardware and peripheral troubleshooting function found in Windows and with which you will find any problem that is related to the port to solve it easily .

To be able to test this, you must give Windows + I to open the configuration of your computer. You have to give to Update and security and on the left Troubleshoot . In Find and Fix other problems you will go to Hardware and Peripherals. You give Run troubleshooter and let it act. Follow the instructions on the screen and find out if the problem has been fixed.


A good check is to check that there is a new firmware version and update your appliances and devices to this, especially the ones that you are going to connect to each other, to make sure you have maximum security since updates are usually made to improve the service, but also to solve some bugs.

You can also update the graphics drivers if it does not work with your computer, since sometimes the problems are due to outdated driver graphics, which usually affects the operation of the interface. It is good that you usually have your drivers updated to the latest version. Do it in Device Manager, you can look for it in the search engine of your operating system.

Change display settings

If you use multiple monitors on your computer, you may not receive video and audio with incorrect display settings. Therefore, you must hit Windows + P to see the list of screen display modes. Only PC screen will appear, duplicate, enlarge, only second screen and connect to a wireless projection. You can switch to the settings that suit your current situation.

Factory reset your SMART TV

If the problem is not solved, you can also reset your TV to factory settings to fix HDMI port problems or other problems that can be caused by a bad configuration. The settings will return to their factory settings, those that came when you bought your device, so if you have made any changes that you should keep, you will have to do it again later. First of all, check that this does not solve the problem. It is usually the last method to resort, but also quite effective in many cases.

Use converters

If the cable does not work, you can change it directly. However, if it is a TV connector and there is no more, the problem can be complicated. One of the solutions that you can resort to, evaluating all aspects, is the use of converters . For example, from HDMI to Scart, to RCA, to VGA with audio jack cable, to YPbPr. You can assess the possibility of using them, although first check that they are compatible with the devices and are the best solution. This is something that is up to you after making a general analysis of the situation.

Use a wireless one

If it doesn’t work, you can try a wireless HDMI, with which you can connect your devices, even if they are in different rooms with a good signal quality. For that, you just have to use the wireless display. You need to connect the adapter to the TV and to the device. It is perhaps not the best solution because it is not the cheapest, but you can use it as an alternative.

Try another

It may not work for you because it is too worn, broken, or simply stopped working and you don’t know the cause. Therefore, sometimes the solution is to change it for a new one and test that this new one goes on your SMART TV. Even if you have tried to avoid taking this step, sometimes it is the best solution. To avoid that it could happen to you soon, buy a new, certified and quality cable.

by Abdullah Sam
I’m a teacher, researcher and writer. I write about study subjects to improve the learning of college and university students. I write top Quality study notes Mostly, Tech, Games, Education, And Solutions/Tips and Tricks. I am a person who helps students to acquire knowledge, competence or virtue.

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