DIY samsung TV matrix repair

In detail: do-it-yourself samsung TV matrix repair from a real master for the site my.housecope.com.

Samsung has long been one of the most popular brands sold and serviced in Russia.
The choice of buyers is justified by the favorable price-quality ratio of the equipment, and the popularity among repairmen is due to many factors that determine the simplicity and ease of repair and maintenance.

Despite the variety of models, Samsung TVs for technicians and service engineers remain uncomplicated and predictable in repair, and the manufacturer's timely technical support with components, modules, documentation and software greatly facilitates and simplifies diagnostics and repairs.

Since the beginning of the nineties of the last century, the craftsmen have accumulated rich experience in repairing Samsung TVs, which was discussed and preserved on the Internet in numerous conferences and blogs of repairmen.
Typical defects of some models sometimes caused controversy and deserve special attention in considering the causes of malfunctions and methods of their elimination.

In this series of articles, it is planned to consider the most common malfunctions of Samsung CRT TVs from 2000 and the most popular LCD TV models in the practice of repairing.

There is no need to consider the problem of electrolytic capacitors in the rectifier filters of power supply modules here, since this is a massive trend characteristic of the first generation of LCD TVs. It should be noted that in LED TVs, the problem with electrolytic capacitors is less common. Perhaps this is due to the lower consumption of LED backlight power converters.

Video (click to play).

Operation of some first generation Samsung LCD TVs with defective power filter capacitors may cause software failure. At first, the settings for the channels may disappear, sometimes specific distortions appear in the “Cinema” mode, the screen backlight adjustment may not work correctly.
Often there is a complete failure in the software and the TV is no longer included in the operating mode.
In such cases, after repairing the power module, it is necessary to replace the contents of the EEPROM memory.

One of the most popular power supplies in repair is described separately in the article Typical faults BN44-00192A. In addition to defects caused by a malfunction of electrolytic capacitors, we note two more typical malfunctions of this module. Ring cracks in the soldering of the terminals of the switch-on transistor from standby mode, as well as breakdown of the sealant with subsequent short circuit and damage to the 2200pF capacitor and breakage of the 0.22 Ohm resistor in the power supply circuit of the key transistors of the converter.

Noise in the image in the form of curved oblique stripes associated with poor filtering of the tuner's power supply is eliminated by replacing the 100uF 16V capacitor on the main board. In this case, there is no need to change the capacitor in the tuner. Sometimes the masters do the opposite, due to insufficient competence, then such a replacement will help for a short while.

Another popular typical malfunction of some Samsung LCD models is the use of the AS-15 gamma correction chip in the T-CON board. AS19. The defect is associated with distortion of color transitions. The image becomes lighter and in places looks like a negative.

The latest LCD models, in particular the SMART-TV, have problems with BGA soldering technology for highly integrated chips.In such cases, malfunctions may occur, usually manifested with warming up, which are caused by a violation of the contact of the chip pins with the corresponding pads on the board.

The malfunction of the LCD matrices is perhaps a separate topic for discussion, but it makes sense to briefly consider some of the external manifestations of its defects.
In most cases, these are straight vertical stripes in certain areas of the screen or throughout its entire area. Stripes can be different, both colored and black and white of different thickness.
Sometimes the nature of the stripes changes with external mechanical stress. Freeze-frame images may appear.
Such matrix defects are associated with broken contacts in the connections of the loops, which can sometimes be restored with warming up.
Repair of the matrix in such cases is associated with its disassembly and restoration of contacts in loops or duplication of connections with external conductors - a complicated process, not recommended by manufacturers and may not always be a successful and reliable solution to the problem.
Due to the fact that the price of the matrix is quite high, it is more than half of the cost of a TV, in most cases, owners of post-warranty TVs refuse to replace the matrix due to the economic inexpediency of repair.

In many models of LED TVs of the 5 series, panels (matrices) with backlight LEDs of sufficiently low quality are installed, or the current in the LEDs is incorrectly calculated. This currently popular typical defect can manifest itself already in the first year of operation. In this case, there is simply no picture.
In authorized service centers, on the recommendation of the manufacturer, they change the LED rulers and limit the current in the LED drivers so that the TVs work out at least the warranty period. And in post-warranty cases, this problem is solved by the craftsmen in different ways, depending on their qualifications and contractual conditions with the owner.
Some explanations and recommendations can be found in the article in our article Repair of Samsung, LG LED-backlights.

Of the most common malfunctions of Samsung CRT TVs, there are several associated with the low reliability of CRTs and their deflecting systems (OS).

The consequence of shorting the filament with the cathode of the kinescope (usually green) is eliminated by isolating the filament from the mass and organizing its separate power supply (2-3 turns per TDKS core). In this case, do not forget to use the standard filament current calibration resistor.

In kinescopes with a flat screen, diagonals of 20 inches and more, a short circuit between the accelerating electrode and the modulator (G2 and G1) often occurs, which is accompanied by the absence of an image.
Fortunately, such short-circuits, in most cases, can be easily eliminated by the usual old-fashioned methods popular among repairmen.

It is more difficult with a short circuit in the lower case deflecting coils of the CRT. At the same time, the line transistor short-circuits, usually immediately upon switching on. In some cases, you can see smoke from under the throat of the OS, feel the characteristic smell, the transistor (HOT) overheats at this time.

A lot of trouble in many models of Samsung CRT-TVs of different diagonals is delivered by the elements of the IOC capacitive divider of the horizontal sync pulse formation circuit. In such cases, the limiting resistor often burns out to charcoal, sometimes damaging the board section along with the conductive tracks.

In cases with “floating” defects, when it is not possible to detect poor contact in the soldering of the element leads, it is necessary to remember the specificity of the metallization of the holes in the power circuits of the horizontal scan, which is characteristic of Samsung CRT TVs.
The contact of the metal sleeve with the copper pad of the board is often painted over, sometimes it is faster to detect sparking in this place than to see an annular crack with a magnifying glass.
Most often, such a breakdown of contact occurs at the place of soldering of the contact pad with metallization of the collector connection of the line transistor.

Typical malfunctions of some common models made on standard chassis can be considered separately.
Pages will be added as the material is prepared.
Typical defects and repair of Samsung chassis KS1A - From the practice of repairing Samsung KS1A TVs.
Typical defects and repair of Samsung chassis KS2A - From the practice of repairing Samsung KS2A TVs

According to the functional composition of CRT (with a kinescope) and LCD (LCD) TVs, separate sections have been created on the site, where modules and elements for well-known and popular models for repair are indicated in the tables:
Composition of Samsung CRT TVs - Functional composition of Samsung CRT TVs.
Composition of Samsung LCD TVs - Functional composition of Samsung LCD TVs.

Some useful recommendations for owners who decide to buy a new TV due to the unrepairability of the old one can be found on the page: how to choose a TV when buying.

Comments and suggestions are welcome and welcome!

And the main reason for the failure of the matrix is the blows on it or the fall of the TV. In our practice, there has even been a case of failure of the matrix as a result of hitting the head of a parrot flying off the cabinet. The parrot is alive, the matrix is irreplaceable. This is not to mention soft toys with glass eyes flying around the room. These are the real enemies of LCD TV. We will modestly keep silent about football or champagne corks ... With this malfunction, restoration of the matrix is impossible and we can offer you a replacement.

The next reason for the malfunction of the matrix is usually a factory defect. The manifestations of this breakdown are so diverse, and have a large number of matrix-to-matrix variations, that it will be difficult to describe them in this article. The main ones are vertical stripes or pillars in the image, the disappearance of the image or part of it, specific effects such as "braking", "freezing" of the image, the appearance of the overexposed sides in the image, smoothly turning into a normal image, and others. This is caused by faulty chips integrated into the matrix glass by means of flexible cables (flexible printed circuit boards). This malfunction can be rectified by our service laboratory. In this case, it is necessary to replace one or more flexible cables integrated into the matrix glass. This is done using special equipment and materials.

Another malfunction of the LCD matrix of the TV is color spots of completely different shapes, round, irregular shapes. This is usually caused by a defect or breakage of the glass or polarizing film. This happens both as a result of violations of operating conditions, or storage of the matrix, and due to violations of the technological process during production. In these cases, only the replacement of the matrix is possible, its repair is impossible.

In extremely rare cases, you still have to deal with cases of unsuccessful attempts to repair the matrix "after gaining" experience on the forums of handymen, or would-be masters. Here we see torn flexible cables, a cracked edge of the matrix glass. All these attempts, if successful, are very unstable, brief, and very often fatal to the matrix itself. The fact is that the repair of the LCD matrix - in addition to the recovery itself, also includes correct assembly and disassembly and many other operations, and if you even managed to fix something, it will not always be possible to assemble it correctly. One wrong move and the matrix is split! She is extremely fragile. Especially matrix sizes over 32 inches.

The liquid crystal matrix of a TV is an extremely vulnerable element. Especially considering that its design is 2 half-millimeter thick, glued together glass, with a size of more than 82 cm in the diagonal - this is probably the most fragile glass creation.And matrix elements, in addition to glass, are also extremely easily damaged. This clearly requires a qualified approach to the repair of dies, as well as the availability of the necessary equipment and tools for the repair. We have at our disposal everything you need for repair, testing of liquid crystal or LCD matrices. And the most important thing is the great experience accumulated over the years of matrix repair. We strongly advise against trying to repair the matrix yourself, as this may lead to the loss of its recreational properties. If the matrix of your device cannot be restored, we will replace the LCD matrix of the TV.

Replacing the matrix on the TV is done in two ways. The matrix, as a rule, undergoes any damage very often. It could be broken by children, the TV has been dropped, or water has somehow gotten onto the screen. If stripes or any spots appear on the screen itself, it will not be very easy to remove them. And best of all, on the TV, just replace the matrix. Such a process cannot be called easy, the part itself is very expensive, since it is the main and important part of the TV.

Replacing the matrix of a TV, basically, occurs due to careless handling of it or the rules of its operation were not followed correctly. Without a matrix, the TV, as a rule, will not work. The repair process itself depends on the complexity of its breakdown.

If water gets on the monitor, then such a repair will be delayed, as it requires a careful approach. It will not be possible to make repairs on your own, because this is a very painstaking work and only a specially trained master will be able to cope with it.

Replacing the screen with a new one can be done if the matrix flew by mechanical damage. That is, if the damage occurs upon impact, and it bursts or scratches appear on the monitor. Then you can cope with such a task with your own hands, you just have to choose the right type of matrix. Since each TV display requires its individual type, with its own main features.

Careless handling of the TV leads to the replacement of the device matrix

The main signs indicating matrix breakage:

The usual image was replaced by vertical stripes of different colors;
Streaks and horizontal streaks have formed;
Dark circles appear on the monitor;
There are small spots on the screen of different colors;
The picture began to disappear partially or completely.

If you notice at least one sign, then you definitely need to make repairs. Restore the matrix if it has leaked or replace it with a new one. A broken matrix does not look aesthetically pleasing on a plasma TV, so it must be changed, without it the device simply will not work.

Today ice TVs and plasma TVs are not a gimmick. One of them can be found in almost every home, office or on the corner of a large supermarket. Such devices have specific breakdowns that require special repair. All well-known manufacturers: Samsung, Philips, Sony, Toshiba provide their warranty period, so the service center should provide its free services.

LCD TVs should be repaired when a microcircuit, loop, screen fails or problems arise with its backlight. All this indicates a breakdown of the matrix. It can be repaired manually or by contacting a service center.

It is sometimes impossible to fix the matrix, as the screen is cracked or completely broken. A broken matrix cannot be repaired, its restoration does not make sense. Therefore, it just needs to be replaced. But if the matrix cable is out of order above, then you can fix it yourself, using the master class lessons.

Repair of the TV matrix cable should be done in stages.

Loop repair instructions:

Disassemble the TV case;
Identify the damaged plume that needs to be repaired;
Carefully you need to disconnect the cable from the matrix, do not shake it, but pull it straight out;
Clean damaged contacts, degrease them;
Solder the contact;
Install the loop in place;
Assemble the device.

This process requires the utmost clarity and care so as not to damage the rest of the thin plumes. At the end of the work, the TV must be checked and made sure of the correctness of its actions. In order not to do such a responsible job, it will be easier to replace the damaged loop with a new one.

Each manufacturer uses an individual type of matrix for their TVs. There are three types of matrices: TN, IPS and VA. Most firms use VA and IPS matrices, as they are advanced models. They have excellent image quality, an excellent color palette and a good viewing angle.

However, these models are prone to breakdowns. Damage to the matrix occurs due to improper and careless handling of equipment. The screen should be regularly looked after, its surface should be cleaned with a soft cloth, do not use detergents and disinfectants.

The well-known company Samsung uses most of the matrix types in its production. One of them is the ltf320ap08 type. If, nevertheless, it breaks down, then it must be tried to be restored or replaced. First, we purchase the correct matrix that is suitable for your model, and then proceed with the repair.

Samsung TV Matrix can be replaced by yourself

Matrix replacement step by step:

Disassemble the TV. You need to disconnect the front of the TV from the back. The body is connected with self-tapping screws, which must be unscrewed with a screwdriver.
Place the die on a soft surface.
Disable all loops. This must be done very carefully so as not to damage the special fasteners of the loop. In this case, adhesive tape is applied to the surface of the joints.
Remove the matrix.
Connect a new element.
Assemble the device case in reverse order.

After all the work done, it is imperative to coordinate the matrix with the TV using the control panel. If this does not happen, you need to make certain settings by entering the TV menu.

Before replacing the screen in TVs from well-known manufacturers Samsung, Philips and LG, first, let's find out what a matrix is. It is a glass surface that contains a large number of pixels. They, in turn, can change the color and brightness of the image, depending on the impact of various signals from the external environment.

The matrix is the main element of TV. Each TV manufacturer uses a different type of matrix. For example, LG TVs use IPS matrices. This type does an excellent job of image clarity and contrast.

Today, LG TVs are hugely popular and are the top-selling model. However, improper handling of the TV leads to its breakdown.

LG TVs are popular today

Major malfunctions:

Cracked screen;
The microcircuit is out of order;
Loop problem;
Pixels have lost their functionality;
LED backlight is off.

Some malfunctions can be eliminated on your own, but more complex breakdowns (broken screen) require the help of a specialist. LG TV repair is practically no different from other devices. There are minor differences that can only be found in the design of the model itself.

Without a matrix, the TV will not work, since it is its basic component. Replacing the matrix is not an easy task. If you are not confident in your abilities, then it is better to seek help from specialists or to a service center. They will help to identify a breakdown, replace the failed parts.

Owners of TV sets with LCD screens are sometimes faced with a situation when it is necessary to replace the matrix on the TV.This raises the question: isn't it easier to buy a new device, since the cost of replacing the LCD panel in service centers is very high? And if we add the price of the new screen here, it turns out that the repair will cost almost as much as a new TV set. But in fact, not everything is so sad. Replacing a TV matrix is not such an overwhelming task. If you know the procedure, then any home craftsman who knows how to hold a screwdriver can do this procedure.

Before you start replacing the matrix of a Samsung TV, LV, Philips, etc., you need to have an initial idea of what an LCD TV screen is. The LCD TV screen is called a matrix. It is a glass surface with many (millions) of pixels, which can change brightness and color under the influence of external signals. The image is formed precisely from these small dots - pixels. Each pixel is controlled by a special microcircuit - a driver, which is located on a flexible cable soldered into the glass of the LCD panel itself. The TV screen is a sensitive element and needs special regular cleaning.

The loop, to which various elements are connected, cannot be separated from the glass. Therefore, a common reason for replacing the screen is damage to the loop.

The most common malfunctions in LCD devices, in which you cannot do without replacing the panel, are the following:

damage to the screen due to mechanical impact (falling, hitting, the screen may be broken or flooded with liquid);
failure of microcircuits that are responsible for the formation of an image of a liquid crystal television receiver - they can be located on a loop soldered into a matrix on a TV;

damage to the loop (non-removable) on which the control drivers are located;

the appearance on the screen of “burnt out” stripes of pixels that have lost their functionality not due to mechanical influences;

backlighting problems.

All the breakdowns listed above are a reason to replace the matrix, since repairing the matrix of an LCD TV is not profitable for material reasons, and is often impossible (for example, when the screen is broken). An exception may include a display malfunction related to the backlight. If the problem lies in a burnt-out fluorescent lamp, then it is quite possible to replace it with a new one, and it will be possible to repair the TV receiver in this way.

Difficulties can arise when repairing an LCD TV if the panel uses light-emitting diode (LED) backlighting. Some manufacturers of LED screens leave the possibility of replacing LEDs, but there are also those that place them on non-removable trains... In this case, replacing the matrix completely is the only correct solution.

Replacing the matrix on a Sony TV differs slightly from the screen (matrix) replacement procedure on an LG TV. Mainly, the difference lies in TV designs, which affects the order of its disassembly. Fasteners can be implemented in the standard way - with screws, or in a less convenient way - with latches, which are more difficult to find and easy to break. The disassembly of the unit can be accessed from the front or from the rear.

When disassembling the device from the front, you should start by releasing the latches that hold the panel lining.There are models of LCD devices, including plasma, which have a protective glass in front of the matrix. If the screen has been broken, then the protective glass will have to be changed.After the latches are detached, you will see the LCD TV matrix screwed to the TV case with screws that need to be removed. Please note that some screws may be duplicated by a latch... After that, unscrew all fasteners on the back of the device, which covers the entire electronic filling of the device.To replace the matrix in an LG, Samsung or any other TV, including a plasma TV, you will need to unscrew all the fasteners holding the rear panel of the unit and remove the stand if it is a desktop model of the device. Since screws of different lengths can be screwed in in different places on the back cover, you need to remember their location.There are designs of television sets, in which the back wall is provided special hatch (e.g. LG TV) for service during the warranty period. When removing the cover, you need to be careful not to damage the cables going to it. Also, disconnect all modules that may be on the cover from the board. Screen replacement is carried out in the same way for a plasma TV.Next, follow these steps. When the cover is removed, you will see in front of you the metal case of the LCD TV matrix, on which all the electronic boards of the device and the cables connected to them are fixed. You will need to be careful when disconnecting the loops (they cannot be loosened in different directions, but you need to pull, carefully, in a straight line). Disconnect them from all boards and modules of the unit. In order not to get confused how to connect them back, you can, before dismantling the matrix of the LG TV, photograph their location.

Also disconnect all loops around the device. On some models, they may be hidden under the frame that surrounds the LCD panel. Attention: there are loops that can be pulled out only by lifting the bar that presses them.

Next, you need to take a new unpacked matrix, and put it next to (by spreading something soft) with the faulty one. This is done for more convenient transfer of parts.

The next step is to transfer all boards and modules from one chassis to another one by one. As soon as the board is transferred, immediately connect all the cables coming from the screen to it.

When all the modules are connected, you can replace the cover and the framing frame (if any), close the rear panel, and finish assembling the LCD TV receiver, and then check the operation of the device.

In order for the TV set to start working correctly, it will be necessary to agree on a new matrix with all modules. To do this, you need to turn on the device, enter the service menu, and make the settings. How this is done is indicated in unit instructions.

Replacing the screen in an LCD or LED TV is not a difficult task, but it requires the utmost care, since you can damage not only very thin cables on the new matrix, but also the matrix itself, as it is very sensitive to kinks. Some other TV malfunctions can also be repaired by hand.

The liquid crystal panel is the key and most expensive part of any television. To repair this component if it breaks down, the user can go to a specialized workshop or rely on his own efforts. Having chosen the second option, the TV owner must be prepared for a number of difficulties that will inevitably arise when performing this procedure. To facilitate the whole process, our detailed instructions will help, where the repair of the LCD matrix of the TV is disassembled in detail.

Immediately, we note that in this material we will not talk about defects in LED backlighting, such as flickering, unevenness, and partial or complete absence. When considering damage and malfunctions, we will only talk about the matrix glass itself, where the picture is formed. For convenience, we have divided all defects into several varieties, for which advice on repair will be written, if possible.

In most cases, the LCD panel will break down after being hit on the screen, dropping the device, or other similar factors. Unlike older TVs, modern matrices are not so good at withstanding some mechanical stress. Even a child's throw of a soft toy with a glass eye into a TV screen can end in disaster for the latter.

If your TV matrix breaks down under the influence of excessive physical impact, then it cannot be restored and the LCD panel must be replaced.

Factory defects are also not uncommon. It can appear both immediately after buying a TV, and after some time using the device. This breakdown can be so diverse that it can be easily divided into several categories at once:

vertical stripes on the screen;
lack of a picture or part of it;
pillars in the image;
"Freezing" or "deceleration" of the frame;
overexposed areas on the matrix, changing their position;
color distortion and so on.

There can be many reasons for this malfunction. Usually the problem lies in flexible cables integrated into the matrix glass and control chips.

In most cases, this problem can be rectified by contacting your manufacturer's service center. You should not try to fix the problem in the new TV on your own, because you will be denied warranty service. Moreover, even if the defect is caused precisely by a factory defect, which involves replacing the device with a new one, you will also not be able to receive compensation after self-intervention.

Another common breakdown of the matrix is various spots of oval, round and any arbitrary shape. They appear due to defects in the glass of the matrix or due to the destroyed polarization layer.

The wear and tear of these elements can be caused not only by a manufacturing defect, but also by a violation of transportation rules, storage standards and even operating requirements. If such spots appear on the display of your TV, then in this case the only possible solution is to replace the matrix.

While this is not a common cause of display breakage, it should also be mentioned. Matrix problems can also appear after self-repair of LED backlight, screen or other components of the TV. In this case, torn trains, cracks in the corners of the screen, chips and other damage may appear. Of course, the repair of the LCD matrix of the TV can be done with your own hands, but for this it is important not only to study the issue, but also to be careful. Remember that fixing any technique also includes proper disassembly and assembly.

It is very important to carry out the disassembly procedure very carefully so as not to damage other components of the device and not make repairing the TV prohibitively expensive. It is especially important to be careful when removing the screen itself, because breaking the loop leading to it will require, as in the case of physical destruction, a complete replacement of the matrix. Alas, such a repair cannot always be called a profitable solution, because taking into account its cost, it would be much more reasonable to purchase a new model. The exact price depends on the characteristics of the matrix, the presence of other defects, as well as the availability of the new screen for sale. Before disassembling the TV, you need to prepare enough space on a large table. The space should be at least 2.5-3 times larger than the dimensions of the device. This is necessary for convenient transfer of various elements, such as screws, boards, and the matrix itself. It is also recommended to place a piece of cardboard or thick soft cloth on the place where all procedures will be carried out, which will protect the display from scratches, chips and other damage.

Then the TV is placed on the table with the screen down and the screws holding the cover are unscrewed along the perimeter of the case. After that, it should be easy to remove, but sometimes you also need to find an additional retainer and put it in a different position. After following this procedure, turn the TV over and remove the front frame from the latches to help you access the matrix. In some cases, it is possible to access the internals of the TV not from the back, but from the front, depending on the design of the device.

If you accidentally spill a drink on the TV (coffee, soda, etc.), after which image artifacts appeared on the screen, then sometimes to restore the TV's performance, it is enough to clean the cables leading to the display. In this case, from the tools, in addition to the screwdrivers for parsing, you only need a regular eraser. However, this method will not help with physical injuries. A video lesson will tell you about the correct cleaning of the loop:

When the case is completely removed, you will see the metal frame of the matrix in front of you, on which all the electronics and the cables connected to it are fixed. Image - DIY samsung TV matrix repair

The latter must be very carefully disconnected in order to prevent breakage. Replacing an LCD matrix in a TV is a fragile process. Then all the screws that hold the motherboard, power supply, and other components are unscrewed.

Owl! In order not to get confused in the subsequent assembly, you can pre-photograph the placement of all the elements of the TV.

After all the components of the model are disconnected from the matrix, you need to unpack the new screen and fix all the boards, cables and speakers on it in the reverse order. As soon as all the modules are in their places, you can proceed with the installation of the frame and cover in place, as well as the subsequent check of the device's performance. The video describes this process in sufficient detail:

Self-repair of the LCD matrix of a TV is a fairly simple procedure, in which, first of all, it is not previously acquired skills that are important, but caution and strict adherence to instructions. If you have minimal experience in disassembling equipment, then you can replace the screen in your TV without any problems. But for more serious damage, you should make sure that you are able to fix the identified problem, and also make sure that such a repair is advisable. Some types of damage will cost TV owners 60-80% of the cost of a brand new model, so consider the economic benefits. If from a financial point of view, the repair does not seem to be an attractive solution, then you should give the TV to the workshop for spare parts, bailing out some money for it.

It is impossible to imagine a modern apartment or house without video and audio equipment. This equipment is used every day and therefore breaks down more often than others. There are several ways to repair TVs: send the technician to a service center, call a qualified technician at home, or make repairs with your own hands.

Before you start repairing a TV, you first need to make sure what the problem is. This will also help if you do the repair yourself, and then when the master comes, you will be able to explain the situation to him.

There are several types of malfunctions that can most often be found when a TV breaks down.

The technique does not turn off. In independence, a CRT TV or a modern LCD model has broken down, this malfunction is associated with a blown fuse. Only different models have distinctive details from each other. You should also pay attention to the diode bridge - perhaps it was he who burned out.
In both domestic and imported models, the potential can often go astray, for the function of which the posistor is responsible.
If the plasma TV monitor is broken, then the problem, most often, is interference or drops, light or dark stripes may appear, color changes while watching a program or movie.
The problem may be a broken cord or a faulty outlet.

If we take into account all the troubles listed above, it is worth saying that the most difficult breakdown is considered to be a screen malfunction. For example, light reflections appear on your monitor after the liquid hits the matrix or the TV is hit, then it is better to carry it to the teleservice. Here it will certainly be repaired, and if the warranty period has not expired, then it will be free of charge or at a reduced price.

See also - How to choose a TV for your home in 2018?

You can try to fix some malfunctions of TVs yourself. And it doesn't matter here - these are LCD models, LCD or LED, it is not necessary to call the wizard if you are confident in your abilities. But caution never hurts, because such TV models are not cheap, and without having any repair experience or knowledge in this area, you can only harm and aggravate the breakdown.

Before you start repairing LED or LCD TVs, you must carefully read the instructions, and also study the principle of operation of your model. Anyone, even one far from this field, will understand that the repair of TVs such as LCD or LED will differ from CRT models. In the latter case, you are guaranteed not to run into a faulty PTC thermistor. The main thing here is to determine the problem, why does the backlight not work?

If you are repairing LCD, LED models, then the only difference here will be what kind of backlight is used. If it is an LCD TV, then the backlighting is produced using fluorescent or fluorescent lamps. For TVs, LED backlighting is produced using LEDs. At this point, the differences between LCD models usually end.

The breakdown may consist only in the fact that there is no power, in order to check this on an LCD TV, you can do the following with your own hands:

open the back cover of the model;

remove the wires connected to the matrix;

connect the working lamp to the contacts;

there are also LCD models in which more than one light source is provided. In this case, all sources must be tested. Just dismantle the matrix and plug your TV into the network - you can see which LED is the problem.

When a broken lamp in an LED or LCD TV is identified, it must be replaced. This stage requires maximum care from the master, as well as the manifestation of special attention. In some cases, the lamp is removed without removing the matrix, you just need to move the protection elements with a rubber gasket and pull out the lamp with a soldering iron. Similarly, it is necessary to mount a working light bulb. Now we can congratulate you - you did the repair of the LCD TV with your own hands! Just pay attention to one important nuance - the new light bulb must fully meet the parameters and dimensions of the broken one!To repair TVs yourself, look carefully at the matrix! If there are "unhealthy" streaks here, then the breakage is in the matrix. Have a new part? Then everything is simple! You change it and turn on the TV, if it works, then you have accurately identified the breakdown.If the reason for the breakdown of LCD TVs is the screen, then it is best to purchase new models of LCD or LED equipment. It is not recommended to change the screen of LCD and LED models, as it is impractical! This also applies to the LCD matrix.What could be the problem with a malfunctioning plasma TV? If it is necessary to repair plasma TVs, then proceed in the same way as described above. Just adapt it to your specific situation. This description can be applied to any model of plasma TV, just stock up on the necessary tools in advance.Although today most users prefer to use plasma, many still watch programs on more outdated CRT models. Let's find out how to repair a breakdown in such TVs. Below is a step-by-step instruction that will help you repair your electron beam product with your own hands.

If you do not turn on such a device, check first of all the fuses. In these TVs, the back is made up of panels. Therefore, it is necessary to unscrew that part of the panels. Under such panels you will find a board and the power terminals must be connected to the fuse. They are connected to a conventional incandescent lamp, or rather to its base, after which the TV must be connected to the network.In the event that your equipment is in good working order, the lamp will go out after switching on, otherwise, when the fuse has blown, it will either not work at all, or it will constantly burn.

The diode bridge may also break. It should only be borne in mind that it is necessary to regulate and repair it only after making a dial. In this case, not only a multimeter is used, but also a product passport, which indicates the main parameters of this model.

The most difficult breakdown in a TV with a kinescope is a posistor. To check with your own hands, you must first turn off the power circuit, and then turn it on. In this case, the lamp must be monitored. If the work lamp goes out, then it can be said that the posistor is faulty. To make repairs, it is necessary to adjust the resistance of the network and only ventures to change this part.

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But not only the matter may be in the posistor, transistors and capacitors burn out in CRT models. The diagnosis of this breakdown can also be made visually. If the condensate is blackened or cracked, then we replace it with a serviceable analogue. Now you know why the TV does not work and how to fix it yourself.