How to restore the screen on a TV

Long gone are the days of CRT televisions - they have been replaced by LCD screens. Thanks to this technology, the image is very clear and beautiful, in the smallest detail. Such devices look stylish and appropriate in the interiors of houses, and are provided by TV receivers. They are characterized by light weight and thinness, easy transportation.

There are two sides to every coin: modern TVs are very fragile, so operation must be very careful. Breakdowns often occur and a web of cracks appears on the screen - is repair possible in this case?

What does the screen consist of?

The main component is the matrix. It contains a huge number of particles that are filled with xenon and neon. The matrix is framed around the perimeter with semiconductors. Phosphors begin to glow when UV is created - a glow created by an electric current that passes through a gas medium. This process causes the cell to glow in the desired color. Together, tens of hundreds of cells create the image that the TV shows.

The entire screen structure is located in a small space between two planes, which are made of durable glass. To understand whether the LCD screen is broken, you need to understand how the breakdown occurred.

Damage to the cable and glass leads to the need to completely change the matrix.

Disconnecting the inverting cable

The vast majority of displays are equipped with an inverter cable, which is located directly under the screen. This arrangement is especially often relevant for older laptop models.

Important! The inverter board is a long printed circuit board to which a pink or black cable is connected. This is the inverter cable.

To remove it, you need to pull it a little. During assembly, you will definitely not be mistaken with the correct installation of the cable, since it can only be connected to the correct side.

Causes of screen breakdowns

Is it possible to repair a TV if the screen is broken or cracked? Let's consider several reasons for the problem:

the TV fell, was hit with a heavy object, was filled with liquid, or suffered other mechanical damage;
microcircuits that are responsible for the functionality of liquid crystals are broken;
pixels have burned out due to non-mechanical reasons;
The backlight has failed.

If the backlight is simply broken, there is hope that the LCD screen can be safely repaired. Especially if it is an outdated model with halogen lamps, which are easy to change. But if LED backlight technology (LED type) is used, repairs are possible based on the manufacturer’s company. For example, many produce models that have built-in LEDs, which are located in cables that cannot be installed. In this case, the situation cannot be corrected.

Diagnostics

Diagnostics of frame scanning, power supply, motherboard, inverter, pixels is much more difficult than repairing them. For this reason, detecting a problem and finding out its cause must be carried out efficiently. If the TV does not function at all, then the first thing you should do is check the board, having first cleaned it of dust and dirt. The procedure should be carried out using a vacuum cleaner or soft brush.

After removing the back cover of the TV and eliminating all kinds of dirt, it is worth carefully inspecting each of its components. Often, problematic structural elements look swollen, burnt, with a leaking capacitor, a darkened resistor, a burnt-out microcircuit or transistor housing.

In some cases, an external examination of the insides of the TV does not make it clear what the cause of the problem is, then you can start checking the power supply. To do this, disconnect the chip that goes to the line scan of the board, and instead of the board you need to solder the load to the contacts of a regular 220 Volt incandescent lamp. If the power supply fails to start, then you should start checking it.

Also, do not forget to check each of the contacts for the presence of dry electrolyte capacitors. For this purpose, each element is unsoldered, its polarity is changed and checked using a conventional ohmmeter.

Cracks on the display

Is it possible to replace the display if cracks appear on it? The fact is that cracks violate the very integrity of the matrix, and a mixture of gases leaks from the container under the glass. This kind of problem cannot be repaired; you just have to buy and install a new matrix.

Many people prefer to buy a new TV, since the cost of the matrix is equivalent to a new device.

It is easier to purchase a new plasma panel if it is a home theater component and does not have audio output devices. Here you just need to replace the broken panel with a new one. If a large multifunctional plasma TV is broken, you should think about repairs. Before choosing a new model, consult with sellers about the quality and place of assembly of the device - operation depends on this.

When to contact specialists

In some cases, it is not possible to repair or replace TV components yourself. The optimal solution to the problem in such situations is to seek professional help from official service centers and private workshops. It is recommended to use the services of specialists if:

the screen is severely damaged and the internal components of the device are affected;
there is no practical experience in repairs and confidence in the correct execution of repairs;
replacement requires rare parts that cannot be found in electronics stores on your own;
A repair attempt was made, but it was not possible to restore the display.

The main advantage is the high probability of successful repair and preliminary performance of complex diagnostics using specialized equipment. Another advantage of professional repair is the quick selection of the necessary components and prompt repairs with a quality guarantee.

Replacing a cracked display yourself

If you decide to fix the problem yourself, use the general recommendations. Please read the device installation instructions first. So, how to replace:

disconnect the TV from the power supply, remove all cables from the outside;
place the device on a soft and flat surface;
unscrew the screws;
remove the frame on the damaged screen;
remove cables and wires from the inside, remove the screen;
mount the new panel and connect cables and wires. Turn on the power.

As you can see, it’s not difficult to do everything yourself. The main thing is that changing the screen does not cost you more than buying a new plasma.

How to set up your TV after fixing it

It is not enough to simply eliminate the reason for the lack of an image, because... After this, additional display settings may be required.

Here is a list of necessary actions, depending on the nature of the malfunction:

Instead of a faulty built-in decoder, an external digital set-top box is used. To watch, you need to switch from DVB-T2 to another channel (depending on the port, it will be AV or HDMI).
Each matrix has its own image output properties, and when replacing it, it is necessary to change the contrast, brightness, etc.
If a digital set-top box for an analog TV was replaced, a new search for TV channels is needed. For cheap T2 devices with 20 channels, it is better to use auto search. Functional digital receivers will need to be configured manually, following the instructions for use.

If you replaced a digital receiver with an analogue one, you need to configure TV channels - first select the signal source, and then start scanning. In other cases, you do not need to change the settings on the TV, but they may be required for another device with which it interacts (for example, a receiver).

Is it possible to change the matrix?

First of all, pay attention to the manufacturer of the device, the amount of damage and the price. If you purchased the device a long time ago, perhaps they no longer produce a matrix for it. If this is the case, you will have to buy a new TV. You may be able to find a replacement part in service centers or at disassembly sites with a quality certificate and warranty. If you have a device with a large set of functions, it is worth trying to repair it. You may just need to reconfigure the matrix - if all the gas has not yet completely come out of it, but stripes appear on the screen (horizontal or vertical), the situation can be corrected.

It is possible to repair this part of the TV, but the repair must be done by a professional. It is necessary to place the device in a vertical position, do not tilt it, it is advisable to fix it firmly or ask someone to hold it. It is recommended to transport large plasma in a spacious car so as not to spoil it.

To begin with, you can call a specialist to your home - this will save your transportation costs. The specialist will conduct a visual inspection and diagnostics, and may replace some components on site. If you pay extra, the technician will independently transport the TV to technical service.

Chinam monitor themselves

Of course, you can fix the monitor yourself. In this case, you will not have to pay for repairs. But, at the same time, you need to have basic knowledge about the design of the monitor. At the same time, you can buy a used matrix of your model, which will be cheaper.

Attention: if you decide to replace the matrix yourself, try to carefully select the parts. Especially regarding their sizes, pin and others

Useful tips for replacing parts yourself:

If you don't understand exactly how to disassemble your monitor, try looking for a video of repairing a monitor of your model (or similar);
You can start looking for a suitable device model in Avito or a similar resource;
It is still advisable to choose the same matrix model as yours.

I would like to add that although you think that it is the matrix that is broken, it is still worth checking the connection cable. Very often it moves away and the screen turns black. Although the computer boots. This can save you a lot of hassle! If the failure is in the monitor itself, I advise you to connect the TV while it is being repaired.

Source

Prevention of cracks and recommendations for safe operation

If you have children in the house, and you are afraid of touching or knocking over the TV, take simple steps to ensure reliable operation. For example, you can install an acrylic screen to protect the LCD - it makes the screen thicker without compromising image quality. Also, you can be sure that your TV will not suffer from spilled tea or impacts or scratches. This acrylic overlay also protects the matrix from dust accumulation.

A serious risk of injury arises from the possibility of falls. Buy a hanging bracket that hangs from the ceiling. Of course, these are unforeseen financial costs, but it’s easier to secure a device than to buy a new one.

Proper operation of household appliances involves malfunctions, cracks and matrix breakage. Install the device on a flat surface or bracket, wipe off dust (without using aggressive household chemicals). Discuss behavior near the TV with your child - active games can lead to broken screens, falls and cracks.

Our service center is often contacted with the problem of a cracked TV screen. The most common cause is mechanical damage to the TV matrix as a result of an impact or equipment falling to the floor. As a rule, the main culprits of such breakdowns are children or pets (most often cats).

Here is one example of children and pets playing. The child was chasing a cat around the apartment and ended up knocking over the TV. A very decent device, model LG 55LA690V-ZB, was damaged. At one time, the owners of this equipment paid almost 2 thousand US dollars for it. And it took just a few seconds for a runaway child and a cat to turn it into trash...

We cannot convey all the grief and anger that wafted from the parents of a sloppy child and also the owners of a cat. First of all, we asked them not to move the cat to another place of residence, which is intended for the disposal of municipal waste (garbage dump). And also do not apply harsh measures to the child.

Before us, they addressed this problem to one of the official services of the manufacturer of the damaged equipment (LG). It announced the cost of replacing the matrix - 1,400 rubles (about $700). The funny thing is that the real cost of such a panel on online flea markets like “Online” or “Kufar” rarely exceeds 1000 rubles (500 US dollars). Having contacted our suppliers, we found out that no one would ship such a matrix to us at a price below 1,200 rubles (600 US dollars).

You probably have a lot of questions swirling in your head that are related to this kind of screen breakdown. In this article we will try to answer your questions as informatively as possible in the form of a question and answer.

Is it possible to repair a cracked TV screen (matrix) or is only an expensive replacement left?

Unfortunately, screen repair is not possible. The design features of the screen do not allow eliminating mechanical damage. The only option to restore the TV's functionality is to replace the panel.

Conclusions: repairing the matrix is not possible; unfortunately, the only option left is an expensive replacement.

Where does such a cosmic cost of replacing a TV matrix come from?

As a rule, the price of the matrix of the total cost of TV is 80 - 95 percent. This is due to the fact that the production of the matrix itself is a very expensive thing. The cost of a screen manufacturing plant ranges from 2 to 10 billion US dollars depending on the generation of production lines and their technological capabilities. In addition, the panel itself is a large item - therefore, the cost is significantly affected by high logistics costs. Due to its size, large storage facilities are required, which again entails increased costs.

Conclusions: the matrix cannot be cheap and its cost is 80 - 95 percent of the cost of the TV.

From the information presented above, another question arises. If the matrix costs 80-95 percent of the cost of the TV, then in practice its replacement may cost more than the cost of such a working TV at a flea market?

Everything is very simple here. The only supplier where you can order a matrix for a damaged TV without any problems is the manufacturer of the damaged equipment itself. Provided that he has warehouse stocks of the required spare parts. When shipping the matrix, the TV manufacturer relies on its purchase price. In simple terms, it looks at how much it cost the company. Naturally, the production/purchase of the required matrix model occurred at the same time as the production of the TV. But several years have passed since the production of the TV, and the TV that includes a broken matrix has lost in price. And the manufacturer produced (purchased) this matrix at the time of TV production (at the peak of price).

You will say that the manufacturer could sell this matrix at a loss in order to get back at least part of the money spent on it. But he won't do this for two reasons:

It is beneficial for the manufacturer that you do not repair the old TV, but purchase a new one.
If a manufacturer has decent stocks of old matrices, they simply produce new budget TVs based on them. And if the matrices are from top-end TVs, then you can also make TVs in the middle price segment. In practice, we have more than once encountered the fact that when disassembling a new TV, we saw in it a matrix that came with TVs that were produced 2–5 years ago.

Conclusions: the manufacturer is not interested in giving away matrices cheaply in order to force you to purchase new equipment. And if there are decent stocks of old matrices, he will produce an entry-level or mid-price TV based on them.

Then you ask the next question. If you can’t buy a cheap new matrix, maybe it’s worth buying a used TV after a thunderstorm. With a burnt out motherboard or power supply. And use the whole matrix to repair your TV.

Regarding TV after a thunderstorm, this is a very sound idea. But here the human factor “like entrepreneurship” begins to work. These types of TVs pop up from time to time at online flea markets. But there are even more people - professional outbids. These crooks spend days and nights scouring flea markets on the Internet in search of such TVs. In practice, if such an ad pops up, the product is sold within 20 minutes. You can create a fake ad yourself, just for fun, and you will be very amazed at the result. They will immediately begin to cut off your phone number.

This solution is feasible in theory, but very difficult to implement in practice. Moreover, you will need a TV with exactly the same matrix. Another matrix most likely will not work on your TV. If it is possible to start it, it is not without the help of a qualified engineer. Moreover, the specialist will want quite a decent amount for his services. Which will again increase the budget of the entire event. In addition, there is no guarantee that the matrix did not burn out as a result of a thunderstorm.

Conclusions: You can try to look for a used matrix at flea markets, but carrying out this activity will be very problematic and fraught with irreparable material losses.

Based on the above, your next question will be - what if I look for resellers who buy such TVs and buy a matrix from them?

In theory, a sound idea, but unfortunately it will have to be broken by the harsh realities of life. In addition to burnt-out TVs with intact LCD panels, resellers are no less actively buying TVs with broken screens (matrices) for 10-20 rubles (5-10 US dollars). Subsequently, they make one working TV from one burnt and one broken one. Which, of course, is immediately displayed on the same Internet resources where broken TVs were purchased. The cycle of things in nature in one word. You are interested in a matrix at a price significantly lower than the cost of the same used TV, at least for half the price. Agree, if equipment repair costs more than half the cost, the meaning of such an operation is lost. It's easier to spend more money and buy a new one.

But it’s easier for a second-hand buyer to sell this matrix by inserting it into a broken TV bought for pennies. In this case, he will receive maximum profit. Selling you a matrix for half the price will only do a good deed for you, but will not increase your profit. Outbids are greedy people, so you don’t have to count on altruism on their part towards you.

Conclusions: no one outbid will sell you a working used matrix. They have a more profitable method of selling such goods.

As a result, we came to the following conclusions:

Repairing the matrix is not possible, so the only option left is an expensive replacement.

The matrix cannot be cheap and its cost is 80 - 95 percent of the cost of a new TV.

The manufacturer is not interested in giving away matrices cheaply in order to force you to purchase new equipment. And if there are decent stocks of old matrices, he will produce an entry-level or mid-price TV based on them.

You can try to look for a used matrix at flea markets, but this event will be very problematic and fraught with irreparable material losses.

No one will sell you a working used matrix. They have a more profitable method of selling such goods.

And now we come to the most important question:

We recommend that you read

How to clean the soleplate of your iron
How to choose an ironing board
How to choose an apartment

The matrix is one of the most expensive parts of a TV. It makes up the majority of the cost of the device. Most services will honestly answer that if it breaks down, it is more profitable to purchase a new TV than to try to replace something.

Important! The exception to the rule is the most expensive plasma models. Here the cost of a TV is 3-4 times more than the matrix itself. Therefore, replacing the part would be the best solution.

Now they produce special acrylic stickers that are maximally protected from the following factors:

Humidity.
Light blows.
Scratches.

This is enough to protect against damage in most cases. Mechanical damage and moisture are the main reasons why malfunctions occur.

In repair practice, as mentioned above, we are more often faced with breakdowns caused by mechanical damage. There are other problems that are encountered quite often:

"Ripples" in the image.
No image. Often associated with short circuits or manufacturing defects.
Cracked glass.
The appearance of stripes and spots on the screen.
Frozen image.

The design of the TV is the main feature that must be taken into account. The order of parsing a particular model depends on this. The following methods are used for fastenings:

Screws, which are standard options.
Latches. Not so convenient.

The unit is disassembled from the front or rear side, if it is decided to change the matrix.

About front access

The first step is to release the latches that hold the structure to the wall.

Important! Some models have a special protective glass in front of the matrix. If the screen is broken, you will have to change this element too.

After disconnecting the latches, you can immediately access the matrix. It is screwed to the body using additional screws. They also need to be unscrewed when carrying out repairs. Some screws are duplicated using a latch. At the last stage of repair, all elements protecting the rear wall are unscrewed. They separate the owners from the electronic content inside the device.

Here is a list of problems that definitely cannot be solved without outside help.

The device stopped turning on altogether, although the plug and cord, along with the socket, are working properly. Then it’s better to disconnect the TVs from the network and call the experts.
The sound disappears. This is due to breakdowns of the speakers themselves, faulty contacts on the cables, or a malfunction of the system board.
Stripes on the screen.
Problems with settings and saving channels.
There is noise on the screen.
The image disappears.
Problems with the HDMI inputs.
There are many breakdowns mentioned above.

Technicians use special types of equipment to find the cause of the malfunction. Only in some cases is a visual inspection sufficient for this. This can happen even after an object falls or mechanical defects appear.

The motherboard controls almost all parts of the TV, including those responsible for the image. If it is damaged, the consequences can be serious. Interference in pictures and problems with channel settings often arise, including due to the motherboard.

But for other elements, inspection will also not be superfluous.

Manufacturers are creating more and more preventive solutions every year to protect customers from such breakdowns. One of the available options is to purchase a special acrylic protective screen. They can withstand even light impacts and scratches, as well as exposure to large quantities of moisture.

Repairing the screen is not possible even with modern technology development. In case of serious damage, you will have to replace either the damaged part or the TV itself. It is better to take precautions from the very beginning, otherwise the additional costs will add up.

Video of a broken TV: Broken TV screen Samsung UE40J6200AW

P.S. We apologize for the somewhat humorous nature of the article.

The article was prepared by an engineer with 20 years of experience in repairing electronic equipment, V.A. Zhdanovich

Is it possible to repair a cracked TV screen (matrix) or is only an expensive replacement left?

Unfortunately, screen repair is not possible. The design features of the screen do not allow eliminating mechanical damage. The only option to restore the TV's functionality is to replace the panel.

Conclusions: repairing the matrix is not possible; unfortunately, the only option left is an expensive replacement.

Where does such a cosmic cost of replacing a TV matrix come from?

Conclusions: the matrix cannot be cheap and its cost is 80 - 95 percent of the cost of the TV.

From the information presented above, another question arises. If the matrix costs 80-95 percent of the cost of the TV, then in practice its replacement may cost more than the cost of such a working TV at a flea market?

You will say that the manufacturer could sell this matrix at a loss in order to get back at least part of the money spent on it. But he won't do this for two reasons:

It is beneficial for the manufacturer that you do not repair the old TV, but purchase a new one.
If a manufacturer has decent stocks of old matrices, they simply produce new budget TVs based on them. And if the matrices are from top-end TVs, then you can also make TVs in the middle price segment. In practice, we have more than once encountered the fact that when disassembling a new TV, we saw in it a matrix that came with TVs that were produced 2–5 years ago.

Then you ask the next question. If you can’t buy a cheap new matrix, maybe it’s worth buying a used TV after a thunderstorm. With a burnt out motherboard or power supply. And use the whole matrix to repair your TV.

Conclusions: You can try to look for a used matrix at flea markets, but carrying out this activity will be very problematic and fraught with irreparable material losses.

Based on the above, your next question will be - what if I look for resellers who buy such TVs and buy a matrix from them?

Conclusions: no one outbid will sell you a working used matrix. They have a more profitable method of selling such goods.

As a result, we came to the following conclusions:

Repairing the matrix is not possible, so the only option left is an expensive replacement.

The matrix cannot be cheap and its cost is 80 - 95 percent of the cost of a new TV.

You can try to look for a used matrix at flea markets, but this event will be very problematic and fraught with irreparable material losses.

No one will sell you a working used matrix. They have a more profitable method of selling such goods.

And now we come to the most important question:

Faulty capacitors

Several swollen electrolytic capacitors. A typical and popular malfunction of switching power supplies.

Because of this, the power supply does not start.

After replacing it with the same new parts, the power supply works again, and with it the monitor itself.

We disassemble the monitor, and the first thought is that it could be faulty electrolytes. And in fact, this is also a fairly typical malfunction, which is associated with drying out capacitors. Their capacity is not enough for normal operation of the power supply.

Power supply 715g2905-1. Visually it doesn't seem to have any problems. The power supply may go into protection due to faulty lamps, so let's first rule out their malfunction.

Disconnect the lamps from the power supply and try turning on the monitor. Naturally, you need to follow safety rules. And do not forget that you do everything at your own peril and risk.

By the way, do not forget to write down the connection points of the lamps. And usually the connections of wires from the lamps to the board are shown on the board itself.

If the monitor light is still blinking and you hear beeping or similar noises, then this is most likely a faulty electrolyte.

But how can you understand which capacitor is faulty if there are visually no swelling or leaks? Here you will have to measure them in a row, or unsolder each one and measure its ESR.

In this case, it was necessary to change capacitors C922 470uF 15V and C923 1000uF 16V.

Visually they are intact, without swelling or damage.

Before soldering, discharge all capacitors again. You can only replace faulty ones with new ones so that the fault does not appear again for a long time. Preferably with the same parameters. The main thing is no less in terms of operating voltage and capacity.

We check the work.

Reasons for such malfunctions

What could be the initial cause of failure of electrolytic capacitors?

External conditions. Case overheating, temperature difference;
High pulsation frequency. Not all power supplies are designed perfectly. They can work much worse at low or high voltage in a 220 V network;
Development of service life. Any parts have their own service life. Chemical sources of electric current are not designed for a long service life, especially when it comes to household appliances.

Precautionary measures

The display of a modern TV is very fragile. A slight mechanical impact on it can lead to a crack. This happens especially often if there are pets or small children in the house, who can knock, hit the screen with a toy, or somehow touch it. You can protect your TV receiver from damage by purchasing a special protective acrylic sheet. They come in different types, some have a curved upper part, with which they are attached to the body. Others come in the form of protective stickers.

When placing the TV on the wall, you need to make sure that it is securely mounted.

If you are thinking about replacing the matrix, it is better to contact specialists to be sure of the result; in addition, you will receive a guarantee for all types of work. Call the number or fill out the feedback form on the website. If you call Remontano before 12:00, the technician will arrive on the day you call.

Preventive measures

A repaired TV arrived at your home, but children, animals or a clumsy family member are still capable of breaking the screen? Something needs to be done urgently.

For such TVs, special protective screens made of acrylic are produced. Such surfaces are not afraid of water or scratches, and children will be able to throw their toys at the screen without forcing their parents to take out a loan for a new device. In addition, such protection saves you from dust, which, by the way, is also the old sworn enemy of televisions. Therefore, the purchase of an “accessory” is the most popular. If you take care of your equipment, you will be able to watch football, movies or cartoons for a long time.

There is also another preventive measure for TV care. To do this you will need to purchase a bracket. Using the bracket allows you to install the plasma directly under the ceiling. Such measures will help to avoid accidental “back pushing” or the consequences of children's active games at home. True, the bracket will cost a little more, and its installation is a completely separate topic.

Malfunctions and their elimination for LCD TVs

You can encounter problems with your LCD TV at any time. And at first glance, without diagnostics, it is difficult to determine what exactly is not working and identify the cause of the breakdown. The most common malfunctions that owners of modern LCD TVs may encounter:

turning the screen on or off independently;
presence of sound without image;
blurred image;
The image and sound disappear periodically;
TV does not turn on;
problems with the remote control;
color distortion;
The TV turned on, but the picture was barely visible.

In this video you will learn more about TV repair:

Each problem has its own cause, but sometimes one reason can lead to a number of breakdowns. Below we list a number of possible reasons that are worth considering:

Faulty power supply or its components (cord; plug);
LED strips or several screen backlight lamps have burned out;
The microcircuit or audio amplifier has failed;
Dust accumulation;
The tuner has stopped picking up the signal and, as a result, there is no image broadcast.

To identify the cause and eliminate the breakdown, you first need to familiarize yourself with the general diagram of the TV in order to have an idea of how a modern LCD TV works, what microcircuits are installed, and their location.

Important! If your LCD or LCD TV has not expired, then it is better to take it to a specialized service center. Before self-intervention. Don't rule out a manufacturing defect.

Any repair begins at the preparatory stage. If you decide to resort to diagnostics and repairs yourself, then prepare a workplace, clear the table on which you place the device. Next, stock up on the necessary tools for complete or partial disassembly.

If there are problems with the display, first of all we diagnose the LED backlight of the screen. For express diagnostics, you will need a regular flashlight. Turn on the TV in normal mode and direct the light beam of the flashlight at the screen; if a weak image is visible on the black monitor, then the problem is with the LED strip or lamp. With the right actions and skill in working with complex devices, they can be easily replaced. The most important thing is to do everything slowly and carefully unscrew all the screws, remove the back cover, then remove the front frame, freeing the screen.

After this, we check the voltage on the LED strip and each lamp to find and replace. You can also identify a burnt-out lamp by inspection; there will be brown marks around it. To repair the screen backlight, just warm it up with a hairdryer, remove the non-working lamp, install a new one in its place and secure it with a hairdryer, which will work on the slowest setting. Repairing the backlight of an LCD TV with your own hands requires care and slow, consistent movements.

Broken screen

You installed the LCD TV on an unstable surface, it falls and the screen breaks, or you accidentally hit the screen with an object and broke it. And, therefore, the question arises: is it possible to repair a broken LCD TV screen?

It is not possible to make the replacement yourself at home. It is better to call a technician or take the TV to a service center or repair shop.

If the screen is broken, it is better to buy a new TV

Attention! When carrying out any types of repair work, ask about a guarantee for the quality of work so as not to overpay for the same breakdown.

If there is no opportunity to return it for repairs for various reasons, then you can purchase a budget version of the TV in stores.

Replacing the matrix

You noticed the appearance of dark and light spots on the device, blinking, partial absence of a picture, the picture began to blink - these are signs that the matrix has failed. To eliminate the consequences associated with a malfunction of the matrix, it can only be replaced. To change the matrix of an LCD TV, you only need to contact a service center, because only a professional can efficiently replace a broken or faulty matrix.

If the LCD screen itself is damaged under the influence of external conditions, the matrix is also damaged. Why a service center? Because only they have original replacement parts from the manufacturer.

No image

No image, a malfunction that can be caused by several reasons. So, there is sound but no picture, what could be the reason? First of all, this is one of the signs of inverter failure. It is the inverter that stabilizes and provides the LCD backlight voltage.

And if there is no image on the LCD TV, but there is sound, then we check the operation of the inverters. Also, uneven screen brightness is also an indicator of improper operation of the inverters. To fix them, it is enough to know how to handle a soldering iron and a multimeter, as well as understand circuits and electronics.

The reason may lie in a poor antenna signal. Check the integrity of the antenna and the quality of its connection. If it is found to be broken, the problem is resolved by purchasing a new one.

Blurred image

A blurry image on an LCD TV usually occurs as a result of incorrect settings, a poor and unstable signal from the antenna, or a connection error when choosing a connector. Since some models of LCD TVs are equipped with tuners that are weak in their technical characteristics, the signal from the antenna will be weak and the picture will not be transmitted clearly. If the screen backlight is faulty, then the brightness decreases, and the image is perceived as blurry and of poor quality. Use the HDMI connector, it improves the quality of broadcasts.

Modern TVs can be used as a computer monitor. Then you should purchase a high-quality wire and use connectors that are specifically designed for this purpose so that the image does not suffer when displayed on a TV screen.

Turns itself off and on

Why does the TV turn off and turn on on its own? It might be worth going into the settings and checking that they are correct. Some models have default settings to turn off when the signal is poor. It is also possible that they could accidentally turn on a timer that automatically turns off the TV.

If, after changing the settings, the TV continues to turn on and turns off by itself, then the reason may be different.

For example, the operating system began to work incorrectly, the inverter power supply circuit has an unstable voltage, and dust can also cause problems for the TV. Therefore, it recommends regularly wiping dust not only from the surface, but also the back cover, as well as the socket, plug, and wire.

Reflashing may help fix some problems

Power supply repair

turning off and on the TV may be due to power supply problems, namely power surges or sockets. If the contact between the plug and the socket is not stable, the TV itself may turn on and off. To find out the real reason, we use an indicator to check the supply of voltage to the electrical network.

To determine whether the problem is really in the power supply, diagnose it. Pay attention to the indicator, if it responds to the remote control and the menu starts on the screen, then the problem is not with the remote control.

Next, we look at the outlet, if it is working properly, and the TV independently decides when to turn off, then the problem lies in the power supply. It is better to repair the power supply at a service center or call a good technician. We do not recommend repairing or replacing it yourself.

To make repairs yourself, you need to clearly understand what the problem is and realize that not all problems can be fixed at home. Never neglect the services of professionals.