LG TV no picture sound works

Failure of the matrix

This is perhaps the most common cause of breakage. In this case, the image can “jump”, the picture can be only half of the screen, or the monitor “stripes” with all kinds of rainbow colors. The matrix tends to break due to moisture ingress, strong impact or falling. The component can also fail due to short circuits.

In this case, it is impossible to make repairs with your own hands. So, if the reason is mechanical damage to the matrix, then you will have to change it to a new one or purchase a new TV. Nevertheless, if the picture becomes “cloudy” or doubles, then the repair is carried out in the service center without replacing the part. With due experience, the matrix can be replaced independently. But the difficulty lies in the ability to find an original quality part. Otherwise, it is a waste of time and money.

Types of malfunctions

The most common causes of missing images on Korean LG TVs are:

  • equipment broadcasts sound, but the image itself on the screen has disappeared;
  • the screen is black;
  • the backlight does not work;
  • distortion of the image;
  • dullness and dimness of the picture;
  • periodic disappearance of the image or the screen goes blank;
  • color reproduction in green or black and white.

The main reason is a malfunction of some components. Problems can be very different.

picture, sound, works

Matrix loop

Symptoms of malfunction of the matrix loop:

  • the TV does not show the image, the picture periodically disappears;
  • the appearance of ripples or interference in the broadcast;
  • the display on the screen is distorted. stripes or duplication of the picture.

It will definitely require repairs in the technical center. The breakdown can be eliminated depending on the specifics of the loop damage. At an early stage, the detected malfunction is eliminated by re-soldering the damaged sections of the element. Otherwise, you will have to replace the part completely.

It is wiser to replace the loop, as repairs can be impractical and very difficult. It is strictly not recommended to repair it yourself.

Burnt capacitors

Strong voltage surges in the network greatly affect the operation of capacitors. The main symptom that a capacitor has broken is a dimming display. Also, the transmission disappears immediately after switching on or after a short time the picture begins to double, the brightness may disappear.

If you disassemble the device itself, then on the board you can see a swollen or exploded capacitor. The fuse also blows out. By the way, after a power surge, the TV’s power supply does not turn on first. In this situation, you need to turn to specially trained people for help. If the breakdown is not eliminated in time, then the problem will become more complicated, since it will lead to a breakdown of the power supply.

Cable problem

If the broadcast volume is normal and the screen is dark, then it is worth testing the antenna cable and HDMI cable. It may well be that the reason is in the dishonest work of the provider or the breakdown of the cable TV set-top box. The Moninfo utility will help detect probable failures.

You also need to check the quality of the connection of the cable contacts and their integrity. To do this, it is recommended, with the TV turned off, to pull out and reinsert the plugs of the antenna wires and the electric cable into the connectors. If the problem lies in the quality of the HDMI cable connection or connecting wire, then it is enough to restart the set-top box or replace the docking cable.

Additionally, you need to pay attention to the router. is the indicator blinking (the connection to the Internet may have been interrupted). And if the electrical wire connector itself is “loose”, then the replacement must be made as soon as possible. Damage to the cable insulation is extremely dangerous and fraught with the closure of the equipment contacts. In addition, the user may be injured.

LG TV has sound but no picture: reasons and repairs

Sometimes even high-quality equipment can fail. It is very unpleasant when the TV works, but like a radio. In some cases, you can make repairs on your own, but you may need the help of a specialist. First, you need to figure out why the LG TV has sound, but no picture. What are the reasons?

Power supply does not work

If LG video equipment has sound, but there is no image or the picture jerks, then the problem lies in the breakdown of the power supply. You can independently carry out the following series of manipulations.

  • Turn off the TV from the network. This will discharge the capacitors. Next, you need to unscrew the fixing bolts and remove the back cover. Check cables and cables for damage. It is also worth paying attention to the performance of the buttons and fuses.
  • Inspect the power supply for melted or damaged resistors and capacitors.
  • Measure the voltage of the output circuits of the power adapter. Indicators must correspond to those specified in the instructions.
  • Tap gently on the TV cabinet. In the case of the normalization of the operation of the equipment, it is worth carrying out a full diagnosis of the power supply. Poor adhesion may be the cause.

In this case, it is best to seek help from a master or the nearest service center, since improvised tools can aggravate the breakdown.

Summing up

So, in addition to the typical everyday reasons caused by the absent-mindedness of the user, the following main ones can be listed:

  • Ingress of moisture;
  • Damage to microcircuits;
  • Broken speakers;
  • Bad contacts.

Breakdowns of this kind should not be attempted with your own hands. Here lies the danger of further disrupting the operation of equipment and, as a result, buying a new one. You always need to call the help of a qualified specialist. it’s good that today such a service as repairing TVs at home is also available. Whether your TV is a JVC or Rolsen brand, or any other, an experienced TV technician will always diagnose the problem and easily fix the equipment. If you have lost sound, do not despair! Call by phone 8 (495) 707-05-05.

We identify the cause of the loss of sound on the TV

What problems can lurk inside the TV? The most common option due to improper handling of equipment is moisture ingress. Even if your TV is in a dry room, it is not flooded with water from the window in the rain, this will not always be a guarantee of safety. Many housewives wipe the equipment with damp rags, spray indoor plants from sprayers. and then there is a risk that moisture will still penetrate the TV. And this can be fatal for the correct operation of the microcircuits. The microcircuit just got wet. and the sound on the TV instantly disappeared.

So, microcircuits are the first vulnerability of every TV. They influence the presence of sound. BBK, Supra, Akai and others have yet to come up with a versatile option that can resist moisture. Of course, it is best to avoid such situations, but once the problem has happened, you will need to call the wizard. Self-repair of equipment can only aggravate the situation, and in the case of such a complex device as a TV, it can become dangerous for the user himself.

Speaker malfunction is the second most common reason why there is no sound on the TV. The TV itself may be fine, but if the speaker is broken, no sound will appear. Only a competent master can diagnose this problem and find solutions. You should not unscrew the speakers on your own, if you are not a specialist, in 70% of cases this only leads to more complicated breakdown and damage to more parts of the TV.

Why is there a black screen on the TV, but the sound remains?

You are faced with such a problem on TV: the TV screen is black, but there is sound. Naturally, due to this malfunction, viewing the programs is not possible. In this article, we’ll show you what to do about this problem. What caused the picture to disappear? Let’s look at the internal and external causes of the problem.

  • To understand what went wrong, the first thing: we look at the equipment. If the equipment is completely new, this malfunction may appear due to the manufacturer’s defect.
  • If the device has served you for several years, there is a possibility that the batteries or backlights are out of order.

It follows from practice that the technique itself most often has absolutely nothing to do with it: this malfunction is not always the result of equipment failure. Uninterrupted image reproduction depends not only on internal elements (boards, circuits, blocks), but also on external ones (antenna cable, distribution box, etc.)

how to fix lg led tv has sound but no picture

Don’t be discouraged if you just see a black screen when you turn on the TV.

There is a possibility that the solution to the problem is very close:

  • Antenna cable (cord);
  • Distribution box;
  • Plug;
  • An external antenna located on the roof is the most vulnerable element in this problem.

Inspect these items, especially the plug. Basically, it is connected from the back to a special connector (socket).

First you need to pull it out of the connector and insert it back. There is a possibility that due to poor contact, the signal coming through the plug is weak. This could be one of the sources of image fading.

Next, you need to connect a second TV (of course, a working one) to the antenna wire in order to check the signal quality.

If, after connecting, a poor-quality signal began to arrive or there is simply no image, then most likely the problem is either in the external antenna or in the antenna cable.

If there is a problem with the external antenna, then it remains only to call the organization responsible for its maintenance.

What to do if the sound on the TV is missing. 5 topical reasons and tips for troubleshooting

Home TV sound can be lost not only with older models. Users of modern TV monitors purchased recently may also face this problem. The reasons can lie both on the surface and hiding inside the device. Why there is no sound on the TV and what can be done about it. in the article.

Diagnostics

The simplest thing that an average user can do is to conduct a visual inspection of the equipment. Within reasonable limits, it is even permissible to disassemble the TV and carry out its internal cleaning. How to independently detect breakdowns?

  • Discharge of capacitors by disconnecting equipment from the network.
  • Opening the back cover of the TV.
  • Inspect cables for possible kinks and breaks.
  • Inspect the power supply for the presence of swelling and melting of capacitors or resistors.
  • If you have special tools, you can measure the voltage of the input circuits of the power supply.
  • Gently tapping the TV case, you can understand the quality of the soldering of the modules and wires (if the technician reacts by blinking during manipulations).

When examining the insides of technology, you should pay special attention to the condition of the boards and capacitors. But it is still better to entrust their repair to a professional if problems are found.

How to set up sound on your LG TV

Modern TVs of the LG brand have a very wide range of options and allow each user to customize the equipment “for himself”: to choose the optimal settings for sound, picture, channels, etc. And first of all, this applies specifically to sound, since depending on the preferences and tastes of the viewer, you can adapt the sound for watching movies, sports programs, listening to music or, conversely, news programs.

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All LG TVs are equipped with Web OS, which makes operating options intuitive and straightforward. All you need to do to optimize your TV sound is to activate the Smart Sound function. Here’s what you need to do for this:

  • Press the Home button on the remote (the “Home” icon).
  • Select the “Settings” item in the menu (the “Gear” icon, and then click on the icon of three vertical dots in the upper right corner of the monitor.
  • Find the item “Sound”, and in it select “Sound Mode”. “Smart”. When this mode is activated, the TV itself will analyze the frequency indicators of the content being played and set the optimal soundtrack settings.

LG Smart TV No Picture but Sound Fix it Now

Please note that in this mode, all settings are set automatically, and while it is active, you will not be able to change the sound settings manually.

How to manually adjust sound on LG TV

You can change the automatic TV sound settings yourself. Manufacturers have provided several popular modes.

  • Press the Home button on the remote (the “Home” icon).
  • Select the “Settings” item in the menu (the “Gear” icon, and then click on the icon of three vertical dots in the right upper corner of the monitor.
  • Find the item “Sound”, in it select “Sound Mode” and select one of the modes offered in the menu to your liking:
  • “Standard”: Suitable for all genres of programs and all types of soundtracks.
  • “Cinema”: intended for films and TV series with special effects.
  • “Sports / Football / Cricket” (the name of this item changes depending on the country): intended for viewing sports content of all kinds.
  • “Music”: in this mode you can listen to music of all genres: from classical concerts to channels with modern music videos and electronic music.
  • Gaming: A mode specially designed for gaming, also suitable when using a TV as a monitor.

In addition to basic sound settings, modern LG TVs can also customize sound effects. They are also located in the “Sound” section of the menu.

  • Select in the menu “Sound” (how to find it, see above) the item “Sound Effects”.
  • Clear Voice II will help make your voice more intelligible.
  • The Clear Surround option, as its name suggests, is capable of creating a multi-channel sound effect. It is only active in 2D mode.

When your LG TV is in 3D, you need the 3D Zoom option with the same features as the Virtual Surround.

  • Equalizer option will help you to manually adjust the sound by adjusting the frequencies.
  • The Balance option is for adjusting the left and right TV speakers.
  • The Reset option will reset all sound settings to factory defaults.

The presence of sound effects may differ depending on the LG TV.

Another convenient feature is the audio volume adjustment. It’s no secret that on different digital channels, the sound volume settings may differ. In order not to adjust the sound with the remote control each time, you can activate the “Auto volume” option. This can be done in the “Sound” menu (how to find it, see above).

It is also worth paying attention to the “Amount of volume increase” function. You can select the gradation “low”, “medium” or “high” and set the range in which you can maximize the volume of the TV.

There is no picture on the TV, but there is sound. how to fix the problem

In our time, a rare person does without a TV. Every year the models become thinner, larger and offer more and more new functionalities. Modern plasma screens with Smart TV technology have little in common with devices that were on sale some ten years ago. However, the commonality between the old and new generations still remains. breakdowns and malfunctions still happen. The reasons for this can be very different: blows, falling, ingress of moisture and direct sunlight, or an elementary marriage. In this article, we will take a closer look at what to do if the TV has lost the image, but there is sound. Let’s figure it out. Go!

What to do if there is no picture on the TV

First, it should be noted that such a malfunction occurs quite often in a wide variety of brands of TVs. TVs of all brands are equally susceptible to this: Samsung, LG, Philips, Sony, Panasonic and many others. Therefore, there is no point in blaming the manufacturer.

There are many reasons for the absence of an image on the screen, and you are unlikely to be able to determine it yourself by eye. Most likely, you still have to contact a service center or other repair service. It all depends on the nature of the problem. on this below.

It happens that when the TV is turned on, a splash screen with the manufacturer’s logo appears first (LG, Samsung, Philips, and so on), after which the screen simply goes blank. With this, you can change channels and hear the sound. Some users noticed that after a while the image appears, but when you turn it on again, everything repeats and there is no picture. In this case, try the following tips:

  • Check the connection of the receiver cord as it may have become disconnected. Make sure the cord is plugged in securely. If there is no video signal from the set-top box, many TVs simply turn off the screen.
  • Also, the problem may be in the cable itself. The wire may be damaged or simply be of poor quality. This applies not only to HDMI cables, but also to cables with bells. In them, the transmission of the audio signal and the video signal occurs on separate wires, and the problem may lie simply in a broken wire or its poor contact. In some cases, replacing the wire can correct the situation.
  • Check the power cable. It must also be securely connected.
  • Some users have found a rather original way to solve the problem. to increase the volume to the maximum (or close to it). After a few seconds, the image will appear and then you can set an acceptable volume level.

Please note that all of the above tips will only help if the screen is working. This is indicated by the splash screen when the TV is switched on. If there is no screensaver and the screen is constantly dark, this already indicates that some component of the TV that is responsible for the image is out of order.

There are several components, failure of which can cause no picture on the screen. It is quite common that the inverter breaks down, which supplies voltage to the backlight lamps. The lamps themselves can also fail, and this, in turn, provokes a breakdown of the power supply. In addition to the faults listed above, it is not uncommon for a matrix or motherboard to break down. Also, the problem may lie in the loops, converter and decoder. In this case, non-working parts and elements will have to be replaced with new ones.

It is not recommended to carry out repairs yourself, since modern TVs are rather complex devices, and you risk aggravating the situation even more. If the above simple tips did not help, then the best solution would be to contact the professionals, since the TV will need to be disassembled. This can be a service center of a manufacturing company or a private office, where repairs will be carried out efficiently and quickly.

One way or another, it is impossible to determine what is the reason for the breakdown of your particular TV without a thorough examination. In any case, the device must be disassembled and diagnosed for non-working parts and components. It is best if this is done in a workshop with appropriate conditions, however, if you do not like this option, then many telemasters provide all these services at home.

Of course, replacing some parts can cost a pretty penny, but it should be noted that matrices or motherboards themselves rarely fail. Usually, breakage occurs as a result of physical damage to the part, for example, when the TV falls or gets wet. In general, you cannot do without a TV master.

Now you know what to do if the TV has lost the picture, but there is sound. You will also understand what could be the reason for such a malfunction. Write in the comments if this article was useful for you, share with other users your experience in solving similar situations, and ask any questions of this article.

Inverter unit repair

Fluorescent lamps installed at the edges of the monitor are responsible for the image quality. The “ignition” of the lamps is carried out by the inverter according to a certain scheme. Reconditioning different types of inverters is done in different ways. Problem with this unit: there is no picture on the TV with HDMI connection due to the lamps not turning on. Self-repair is not recommended, certain skills and knowledge are required, as well as specialized equipment and spare parts that are selected strictly for your TV model.

Lost sound. we solve the problem

The reason why the sound does not work is covered:

  • In faulty speakers.
  • Lost contact of the elements, this happens due to mechanical damage.
  • The microcircuit is out of order.

Sometimes this problem is solved through the settings. In other cases, it is necessary to replace some units. Speakers on Samsung and Philips TVs often stop working and have to be replaced. Our craftsmen always have at hand the missing good quality part.

There is no picture on the TV screen. reasons

When self-repairing, the main thing is to find the source of the problem, the cause of the malfunction. If there is no image on the TV, then we are looking for the reason:

  • In the power supply or inverter.
  • When the device has a kinescope, a vertical or line scan unit is a cause for concern.
  • If the screen is dim, don’t wait for it to fail at all. Timely repairs associated with the failure of backlight lamps will save you money and nerves.
  • Any problem with the image, including a white screen, may be due to damage to the matrix.
  • If there is no image on the TV screen and you see a black screen, in particular, for LG models, a personnel microcircuit is a typical malfunction.
  • Another problem: the screen glows, but there is no image, this is due to a faulty video detector or video amplifier.

Is this the first time you hear these difficult words? We strongly recommend that you contact us. Professional TV repairman will bring your favorite technology back to life.

Why is there no picture on TV via HDMI cable

What should I do if there is no picture on my TV when using the HDMI connector? First of all, you need to check the HDMI cable connection and figure it out. On a household appliance, we connect the same input through the settings. Next, in the computer settings, we check that the image output to the TV is connected. If the screen does not show, then you need to find out what the reason is: the equipment or the HDMI cable is not working properly. It is possible to answer this question if you have one more cable and a laptop.

If you failed to connect and there is no picture and sound, then you need to update the video card driver and try again. It is very rare that there is a problem with the TV. But sometimes a new graphics driver needs to be installed. This is especially true for Sony and Toshiba models. If after all the manipulations when connecting HDMI, there is no image, contact the service center.

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There is no picture on the TV screen, but there is sound

Technique becomes more difficult, and doing self-repair is a time-consuming job that is often doomed to failure. Is your TV broken? Do you know why there is sound but no picture? Contact the Service Center “21st Century”, the masters will quickly repair the equipment and issue a guarantee for their work. By dialing the phone number
8 (495) 745-24-00 or by leaving a request on the website, you will save nerves, time and money on TV repair. We work at a convenient time for you from Monday to Sunday even on holidays from 8:00 to 23:00 throughout Moscow and the Moscow region.

The choice of expensive equipment: plasma, LCD models obliges you to monitor and repair the devices during the repair, especially when there is no image on the TV, but there is sound. Self-intervention and disassembly of the device can lead to complete failure and replacement of expensive parts. This must be remembered, as well as the warranty period, which will end due to unprofessional actions of the owners. If the screen does not show an image, self-intervention is possible, but fraught with consequences.

HDMI cable is connected but there is no sound

This is an even more common problem for users, when, when trying to output sound to the TV, it disappears altogether. It is also possible that the sound from the computer continues to flow, and it is not possible to switch to the TV speakers. Checking the playback device on the computer, setting the default plasma or LCD TV.

Why does a black screen appear on TV and sound works

Try to find out if your TV has a mute function. This is true for newer LCD / LED TVs such as:

  • Philips (Philips);
  • Toshiba (Toshiba);
  • Sony (Sony);
  • LG (LG);
  • Samsung (Samsung).

Certain TVs have the ability to turn off the picture: this function allows you to listen to the sound of the TV or DVD player when the picture is turned off Make sure not to enable this function.

But if we exclude all factors from the outside, then only the problem remains at the hardware level. Let’s take a look at what’s the matter.

A common cause of malfunction of new TVs, due to which the image disappears when there is sound, is the failure of lamps or LEDs of the screen backlight.

The easiest way to determine whether the problem is in the backlight or not is: take any light source (lamp, hand-held flashlight, or even a flashlight on your phone) and, with the TV turned on, bring the light source to the screen.

If you see that the image is there, but it is very difficult to see, then your lamps or LED strip are out of order. Of course, there is a possibility that the chromaticity module, power supply, frame and line scan unit, tuner or matrix are out of order.

If you are not an expert in this matter, it is quite difficult to replace or repair the listed parts, therefore, this work should be carried out only by a TV repair specialist.

Proper handling of the TV is the key to its long-term service.!

Often equipment breaks down due to improper operation.

Unscrupulous attitude to the appearance of minor malfunctions, mechanical stress, penetration of moisture into the body. all this leads to wear of the components, as a result of which malfunctions appear.

One of the most vulnerable spots in modern TVs is the inverter. This part often fails. An inverter is an expensive part, so a specialist will most often recommend repairing it rather than replacing it. This problem, for which the picture is missing, is typical for TVs of LG and Samsung models.

Why is there a black screen on the TV, but the sound remains?

You are faced with such a problem on TV: the TV screen is black, but there is sound. Naturally, due to this malfunction, viewing the programs is not possible. In this article, we’ll show you what to do about this problem. What caused the picture to disappear? Let’s look at the internal and external causes of the problem.

  • To understand what went wrong, the first thing: we look at the equipment. If the equipment is completely new, this malfunction may appear due to the manufacturer’s defect.
  • If the device has served you for several years, there is a possibility that the batteries or backlights are out of order.

It follows from practice that the technique itself most often has absolutely nothing to do with it: this malfunction is not always the result of equipment failure. Uninterrupted image reproduction depends not only on internal elements (boards, circuits, blocks), but also on external ones (antenna cable, distribution box, etc.)

Don’t be discouraged if you just see a black screen when you turn on the TV.

There is a possibility that the solution to the problem is very close:

  • Antenna cable (cord);
  • Distribution box;
  • Plug;
  • An external antenna located on the roof is the most vulnerable element in this problem.

Inspect these items, especially the plug. Basically, it is connected from the back to a special connector (socket).

First you need to pull it out of the connector and insert it back. There is a possibility that due to poor contact, the signal coming through the plug is weak. This could be one of the sources of image fading.

Next, you need to connect a second TV (of course, a working one) to the antenna wire in order to check the signal quality.

If, after connecting, a poor-quality signal began to arrive or there is simply no image, then most likely the problem is either in the external antenna or in the antenna cable.

If there is a problem with the external antenna, then it remains only to call the organization responsible for its maintenance.

What is the reason for the disappearance of the image on the TV screen connected via HDMI?

Let’s just superficially touch on the connection via HDMI of a computer to a TV. In rare cases, with this connection, the image may disappear quite often. The first thing to do is test the HDMI cable itself. Also check if hibernation is running on your computer.

The sound can also be played, but the picture will never be. Basically, everyone can cope with the HDMI cable connection, and this is not a serious problem if you have a whole and working HDMI cable. But this issue also has its own pitfalls that the user may encounter.

So what to do. If you do not have an image when connecting, check the cable for kinks, bends, breaks, if there is such damage, you need to replace the HDMI cable.

You also need to check the settings and make sure that the computer has not entered sleep mode. Another option is connector failure. In this case, you need to refer the technician for repair to specialists.

These are the main reasons due to which, when the TV is connected via HDMI, the image is not displayed.

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What you need to know before solving the problem

When there is sound on a Samsung TV, but there is no picture, you should understand the specifics of your TV:

  • The analog signal is supplied “as is”, while the digital signal is encoded into packet data, transmitted over the communication channel and decrypted into audio and video. That is, if your TV works with digital channels, data loss will affect both signal and sound performance. Losing the video signal so that the sound remains pure is, in principle, impossible. Perhaps the problem lies in the transfer of the picture from the receiver to the TV itself.
  • It is necessary to determine. what’s wrong with the screen ?! It does not show, or does not work at all (that is, it is the same with any lighting that is in the “on” state, that in the “off”).

Missing image on TV: reasons and solutions

Hello everyone! Today I ran into a problem. there is no picture on the TV, but there is sound. How, then, can the TV be repaired?. There is every chance to assume that the hardware part, or rather the backlight, is broken. The article discusses how to set up and repair a TV at home.

System part

When the image on the TV disappeared, but you were able to identify that the backlit screen is completely working, but the TV channels are not showing. look for a problem in the connection of the cables (replace them), in the operability of the decoder, the correct channel settings.

Hardware part

When the TV is under warranty, it is recommended not to repair it yourself, but to hand it over to a service center. Let it be repaired by a specialist and returned to working order. If the warranty period has long expired, you do not have a suitable set of screwdrivers and experience in disassembling and assembling TVs / monitors. take the TV to a TV repair center. Delegate this problem so that home repairs do not result in damage to TV parts. Who got their hands on the technique, read the manual further.

If the TV does not show an image, but there is sound, there is probably a problem with the backlight. How to check that the backlight has burned out:

  • We turn on the TV and look closely at the screen. If it is noticeable that the image is present (of the logo), but very weak, the backlight has burned out with a probability of 100%.
  • If suddenly nothing is visible on the screen, then you take it with an ordinary flashlight on your phone and begin to shine through the image itself. From a certain angle, you can see the picture: if the picture is present, there is a problem with the backlight (or the backlight driver)
  • If nothing is visible, then it is already necessary to look at the motherboard or T-CON, figure out what exactly is the matter.

In most cases, on Samsung and LG TVs, such a breakdown is bypassed by replacing the diodes:

  • Unscrew the bolts of the back cover of the TV set on the table and remove it.
  • Disconnect the board cables and remove the same boards from the TV by unscrewing the bolts holding them.
  • Then unscrew the bottom strip by removing the retaining bolts and set aside.
  • Unscrew the remaining bolts around the perimeter, turn the TV screen upside down and begin to detach first the protective frame, and then the display itself.
  • Next, remove from the latches the frame holding the sheet of transparent material and the LED panel.
  • To remove the diffuser, you need to remove the latches. Filming is not difficult, lift both sides and scroll inside. On the other type of latch, lift that edge up and slide everything to the right. Such a film is needed to specifically scatter light so that there are no highlights on the sides.
  • Done. Now you can see the LED panel with your own eyes.

You can watch the video for visual instructions on how to disassemble the TV.

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Reasons for the absence of an image

Almost always, this type of malfunction indicates a breakdown, and not out of place settings, or a problem on the “transmitter” side. This is verified by simply switching to another channel with the remote control. The rest of the faults still end up on the side of the TV owner and are divided into two types:

  • Hardware. the TV does not show an image due to a malfunction of the backlight (most often), display, or boards.
  • System. The TV screen is working properly, but there is no picture due to poor TV signal.

At the same time, a system problem may mean: failure of the TV receiver or receiver (if it is connected to the TV).

Video signal malfunction

When the LG TV is paired with a TV tuner, wires are often used to receive sound and picture, which carry the sound and video separately. If the screen is black but sound comes in, check the component and composite wires:

  • RCA (tulips). they are often implemented to connect digital receivers to televisions oriented to receive only an analog signal. Check yellow, red, or both. They are responsible for the picture. They may be loose, damaged, or plugged into damaged connectors.
  • VGA / HDMI are component wires that have a single plug with multiple PINs. When one of the wires inside is damaged, then the video simply does not work. It is recommended to replace the cable or use a different type of cable (if feasible).

If in doubt about damage to the cable, check its operation on other equipment.

Decoder problems

A malfunction is possible not only in the transmission of the TV signal through the cable, but also in the problematic operation of the decoder. It can be installed:

  • In the TV. if the signal goes to the TV via cable directly.
  • In the receiver. when receiving a signal through an antenna cable and outputting a picture to TV through component and composite wires.

Repairing or flashing a decoder is not a simple procedure and requires disassembling the hardware, replacing or connecting a programmer for flashing. If the price of the firmware is justified, then the replacement of the decoder is practically equivalent to the price of a new receiver. If the decoder breaks down on the TV, then it is recommended to replace the decoder, not the TV.

Broken cable

If the quality of the audio signal does not raise any questions, and there is no picture, it is imperative to check the integrity of the connecting elements. It’s about the cable. Which one? The answer to this question depends directly on the signal source. Therefore, you need to inspect:

  • antenna cable;
  • HDMI wire;
  • cable connected by your cable TV provider;
  • Ethernet cable (provided that you are using Smart TV).

Use special software to determine the cause of the black screen. For example, the Moninfo utility. It helps you identify audio and video problems. If the program detects malfunctions, you must carefully inspect the cable for damage.

Types of malfunctions

If there is no picture on the LG TV, but there is sound, then this is just one of the signs of a malfunction of the equipment. There are other symptoms that also indicate the presence of problems with the operation of the TV device. Let’s consider the most common defects.

Image flashes continuously, brightness level has decreased.

Deactivate power saving TV mode.

There are defects on the screen and the diagnostic test found no problems.

Check if the connection is correct according to the signal source.

Go to “Advanced settings” to adjust the brightness settings.

The image is doubled or too blurry.

Disable Eco Mode and Energy Saving Features.

Check the quality of TV signal reception.

Disconnect the cable and then reconnect it.

Dotted line appeared along the TV screen.

The user can eliminate the defects listed above on his own. Many of the troubleshooting methods described above can also help if there is no picture but there is sound.

Reasons for the disappearance of the image

The most common reason for the disappearance of the image on the LV TV is hardware breakdowns. What to do in such situations? How to restore the correct broadcast of digital or analog TV? It is necessary to carry out diagnostics to determine the failed module.

Immediately after identifying a damaged component, it must be replaced. You can do this yourself. However, this option is relevant, provided that you have the necessary skills and equipment. If you do not know how to repair TV, then contact the service center.

Now let’s go directly to the consideration of the main reasons for the disappearance of the image.

picture, sound, works

What to do if a picture is missing on your LG TV, but there is sound

Users encounter such a failure quite often. Run diagnostics to determine why there is no picture on your LG TV but there is sound. Mostly the reason lies in the malfunction of the hardware modules. However, in no case can you rule out software failures.

Users can fix some defects on their own. complex breakdowns requiring a full disassembly of the TV are best left to the specialists of the service center.

Burnt out power supply

If there is sound, but the picture is constantly twitching, the screen is dark, the brightness has dropped, other defects have appeared, then the power supply unit of the LCD TV is not functioning correctly.

Users who do not know how LG LED TVs work should never try to repair them on their own. Call a specialist who can quickly determine the reason for the incorrect operation of the TV.

However, the diagnosis can still be carried out independently at home:

  • Start by discharging the capacitors. Unplug the TV from the wall outlet. Unscrew the fixing bolts, and then remove the rear cover. Check cables and cables, some of them may be damaged. Be sure to test the functionality of the buttons and fuses.
  • Inspect the power supply for melted or charred resistors, capacitors. If there are such elements, then they must be replaced immediately.
  • Measure the voltage of the output circuits of the power adapter. The obtained indicators must correspond to the parameters that are indicated on the board or in the documents of the equipment.
  • Voltage drops. For example, the voltage level reaches 200V, find the cause of the breakdown in the primary power circuit.
  • If you knock on the TV case, and the image has returned to normal for a few seconds, then the problem was caused by poor-quality soldering of the power supply elements.

Soldering contacts and other elements must be carried out with professional equipment. The use of improvised means is fraught with the aggravation of the original malfunction.

Capacitors burnt out

In LCD TVs, capacitor problems are caused by power surges. Signs of a defective capacitor:

  • the picture is double;
  • there is no image;
  • the TV turns off arbitrarily;
  • low brightness level;
  • incorrect color rendering.

In order for the device to start working correctly again, you need to disassemble it. On the board, you will see a damaged capacitor and a blown fuse.

If the breakdown is not eliminated in a timely manner, the malfunction will worsen. After a while, there will be irregularities in the operation of the power supply. The set of procedures aimed at diagnostics is identical to the situation with matrix breakage.

Replacing capacitors is a complex type of hardware repair for TVs. The slightest inaccuracy will provoke an aggravation of the malfunction. Therefore, it is wiser to entrust the elimination of the malfunction to the specialists of the service center.

Failure of the matrix

Matrix breakage is perhaps the most common reason that there is no picture on the TV screen. Also, damage to the matrix can cause a number of other symptoms:

  • video shakes;
  • the image is displayed only on half of the screen;
  • various stripes appear around the perimeter of the screen.

Why is the matrix not working? The component fails due to short circuits and mechanical damage. It is impossible to repair a faulty matrix. Therefore, a part is replaced. If defects began to appear for no reason, for example, the image darkened sharply. The matrix elements are probably damaged, their replacement is much cheaper than the entire module.

Can you change the matrix yourself at home? This is theoretically possible. However, it will be extremely difficult for a person who has never repaired televisions. In addition, instead of the broken part, you need to install the original matrix. It is very difficult to buy branded components.

Burnt out inverter

Due to the fact that the inverter has broken down, the TV screen stops working. Breakage symptoms:

  • distortions appear, the picture twitches;
  • the image is missing in principle or takes a long time to load;
  • the TV display dims after switching on and instantly goes out;
  • sound is transmitted correctly, but ripples appear on the screen;
  • the picture is very blurry, the brightness level is low.

The main function of the inverter is to supply voltage to the backlight lamps. Therefore, if the TV screen does not light up, then perhaps the reason lies precisely in the malfunction of the inverter.

  • conversion of direct (12-volt) voltage to alternating;
  • stabilization of the input current of the lamp to the required values;
  • adjusting the brightness level of the image;
  • matching the output stage with the input tube resistance;
  • protection of microcircuits and boards from possible short circuit, overload.

How to determine if the problem with the absence of an image is caused by the failure of the inverter? It is necessary to disassemble the TV and conduct a comprehensive diagnosis. The breakdown of the module can be determined during the visual inspection.

To restore the TV, you need to have at your disposal a hot air and infrared soldering station, as well as a multimeter. A good knowledge of physics and electronics is also required. It is extremely difficult to say which element has failed. Incorrect TV operation can be caused by a breakdown of the lamp, transformer, controller board.