DIY LCD TV matrix repair

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

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.

Video (click to play).

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.

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.

Read also: Starter vaz 2114 DIY repair

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.

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.

Do-it-yourself TV repair is a responsible business, since today a large number of different models (LCD, LSD, CRT) are presented on the market, each of which has its own technological features. Therefore, the approach to each type of TV is individual; in some cases, special skills will be required (knowledge of electronics, experience with a soldering station).Before proceeding with the repair of television equipment, it is necessary to find out the cause of the problem.The most common problems are:

TV screen does not turn on - this can happen with an old picture tube screen and with the most modern television panel. Basically, this symptom is characteristic of a blown fuse. When repairing, it should be borne in mind that the appropriate fuse must be selected for each model. And also experts recommend paying attention to the diode bridge, power supply, wire, perhaps the cause of the malfunction lies in these elements. Read also what to do if Samsung TV does not turn on.

Faint, barely noticeable picture - such a breakdown happens with LCD / LCD monitors.The most likely cause of the malfunction: faulty diodes, device backlighting.

There is no sound, the screen "wheezes" - most likely, the sound amplifier or microcircuit is out of order. Also read what to do if there is sound, but there is no picture.

Monitor is on, no picture - Perhaps the cause of the problem is in the video processor or in the receiving unit.

You should be aware that if a darkening of the board or rupture of elements is detected during a visual inspection of television equipment, then it is not recommended to immediately start replacing parts. Since such factors indicate a short circuit that could have occurred in another section of the TV. Therefore, if you do not eliminate the cause of the short circuit, but simply change the failed elements, then the situation will repeat itself.To repair television equipment, the following tools and equipment may be required:

Screwdriver Set;

hex keys (in rare cases);

pliers;

soldering station (for repairing modern monitors);

screen layout (can be downloaded on the Internet);

multimeter;

oscilloscope.

Many LCD screen problems can be dealt with on your own. But you should know that these screens require more careful handling than, for example, CRT TVs.First of all, the user needs to study the instructions for his model, and only after that start repairing the LCD or LED screen. You should be aware that LCD TVs use fluorescent bulbs for backlighting, while LEDs use LEDs. Image - DIY LCD TV matrix repair

The TV may not function due to lack of power, to check this, you need to do the following:

Open the back cover of the LCD TV with tools.
Disconnect the wires that are connected to the device matrix.
Connect a working light bulb to the contacts.
Some panels have more than one light source, in which case they must be tested as well. This can be done as follows: pull out the TV matrix and connect it to the network, it will immediately become clear which lamp is out of order.

After the faulty luminaire is found, it must be replaced. This procedure should be carried out as carefully as possible. In most cases, the lamp can be taken out even without removing the matrix - you need to move the protection elements and get the burned out part using a soldering station. Then a new lamp is installed in the same way.An important rule is that the new lamp must be completely identical to the old one.

Another common problem with these models is damage to the monitor. But in this case, it is not advisable to repair LCD TVs, since it is easier to buy a new screen. This test scheme can also be used to repair plasma televisions of all types. Read also how to fix the LED backlight yourself.

Each manufacturer has its own weak points, so below is a selection of the most common LCD screen breakdowns.

Often, users of this brand are faced with such a problem that when turned on, the device beeps without interruption. This symptom usually indicates that a leak has occurred. It is recommended to try replacing the preout stage diode.

Another common problem is that the monitor turns on and off itself. The main reason for this breakdown is a failed transistor, it is necessary to replace it. It is recommended that such malfunctions be eliminated on their own only by people who have experience in repairing television equipment.

DIY Philips TV repair is recommended if the problem is minor: settings are lost, cable replacement is required.

If the breakdown is complex, then it is better to entrust its elimination to specialists who will not only professionally perform repairs, but also issue a guarantee. Therefore, if the repaired screen stops working again, the user may demand a refund.

LG flat screen owners may have a problem saving settings. Such a problem does not require contacting the masters, you can repair the LG TV yourself. It is enough to switch the device to another operating mode, and all settings will be saved.

As well as in the case of other LCD models, if the problem is serious, then it is not recommended to repair an LG TV with your own hands, it is better to contact a specialist.

Despite the fact that today the majority of consumers prefer the most modern plasmas, CRT screens are still in demand. These TVs have their advantages: they are inexpensive, easy to operate, and the quality of the transmitted picture is still high.

The main problems with CRT devices:

the CRT TV does not turn on - just like on devices of a different type, first of all, you need to check the integrity of the fuses;
a diode bridge malfunction is a common problem with CRT receivers, you can fix the TV only after making a "ringing", you will need a multimeter from the equipment;
breakage of the posistor is considered the most serious problem; in order to check, it is necessary to turn off the power circuit of the TV, then start it again. After, observe the lamp, if it goes out, it means that the posistor is out of order. First of all, you need to adjust the resistance of the network, and then replace the part;
burnout of a transistor or capacitor - such a malfunction can be easily replaced by visual inspection (on black carbon parts), repair is carried out by replacing the part.

Below is a list of problems encountered by owners of CRT TVs.

The Rubin TV buzzes loudly when connected - most likely, the photodetector needs to be replaced.
The ruby does not turn on, the indicator does not light up - voltage surges in the transistor.

The Horizon TV does not have a blue tint, as well as the white balance is disturbed - this is mainly due to a break in the resistor.
There is sound, no image - the cause of the problem lies in poor contact of the power connector of the screen board. It is recommended to use a soldering iron to solder the harness into the Horizon TV board.

The screen does not turn on - there is a problem with the power supply.
A horizontal strip appears on the monitor - repairing a Vityaz TV consists in fixing a problem in the frame scan microcircuit.

Since the malfunction of the power supply is one of the most common problems of all types of TVs, it is necessary to study it in more detail.

Since all models of LCD monitors do not have fundamentally different design differences, therefore, the diagram below can be applied to all TVs (Toshiba, Horizon, Samsung, Sony, Rubin).

Repair of monitors equipped with a picture tube, for example, such as (ruby, sharp 2002sc, sony trinitron, vvk), as well as repair of Samsung TV, Panasonic. always starts checking the power supply.

Testing is carried out using an incandescent lamp, but before performing the procedure, it is necessary to disconnect Sharp c2002sc, Samsung or another screen from the load (horizontal cascade). The horizontal scan voltage can vary from 110 to 150 V, it depends on the size of the picture tube. It is required to find a sweep filter capacitor in the TV circuit. Next, you will need to connect a light bulb, in order to remove the load, it is necessary to unsolder the choke and the fuse through which the JV element consumes power. This scheme is used for sharp screens since 2002sc.

After that, connect the power adapter to electricity and measure the voltage, if the values exceed the norm, you will have to check the feedback circuit of the power supply. If the power supply unit is in good condition, then the light bulb is removed and all the elements are soldered into place. This is the basic information on how to repair a TV with your own hands.

In previous posts, I posted photos of flooded matrices from TV. It was often asked whether these are recovered or immediately released. According to personal statistics, 60/40 where 40 is a success. Usually they are driven late when they have eaten everything that is possible. And here the other day I came across a TV set whose matrix was again flooded. The restoration process did not work out completely, but there are several photos. After cleaning from the muck, I begin to restore clearly visible damage with the wires from the MGTF wires.

This is how it can be seen through a microscope

The most difficult thing, as for me, is to strip the insulation from the loop from the glass and not damage the conductor itself. For those interested in the scale, a comparison with a syringe needle:

Having restored everything that I saw, I try to turn it on and it almost came out)) There is an offset and a part is duplicated.

After digging a little more tracks, I found a couple of seemingly intact ones, but the dial tone was in the cliff. All right. This panel has been restored:

Then there is an hour of running in disassembled form. Then I isolate all the restored contacts and put them together for a full run for the whole working day. If any artifacts do not come out, then I give it to the client. In this case, happy ending. TV has been working for 3 days. It was lucky that not a lot of liquid got in and they brought it not after a month, as usually happens, but after a week.

I am interested in the successful experience of repairing the matrix, except for replacing the lamp.

And with the fall - this is a special case, which is now in front of me.

Thank you for your interest.

_________________
Anything that cannot be programmed in assembly language has to be soldered.

I can sell EVERYTHING, but whether the price suits you.

At the expense of know-how. In the late 90s Tefal was introduced to us as a know-how “in a frying pan”.
But in fact: the first mention that I have met, A.E. Chichibanin "organic" already in 1954, the publication and achievement of Russian chemists.
Maybe not in the subject, but “surprisingly close. "

And the matrices are really relevant. I have little experience, but eat from scratch.
I don't hope for free, I hope to find understanding.

_________________
Anything that cannot be programmed in assembly language has to be soldered.

I can sell EVERYTHING, but whether the price suits you.

And how do you determine, if not a secret, which capacitor is faulty - by desoldering everything or on the board?

_________________
Anything that cannot be programmed in assembly language has to be soldered.

I can sell EVERYTHING, but whether the price suits you.

_________________
Anything that cannot be programmed in assembly language has to be soldered.

I can sell EVERYTHING, but whether the price suits you.

If you have stripes on the monitor - do not rush to throw away the matrix, it can be reanimated!
Know-how. Anyway.

[info] sergiokrm
February 12th, 16:59

A couple of hours ago, I updated the previous post about the 19 ″ matrix, after that, during the experiments, I found out one important thing. It turns out that decoder cables, torn from the matrix board, can be returned quite easily (in the case when the cable has come off the glass, it is unlikely that anything can be done). How to attach it back? It's very simple - to SOLDER! 🙂

In order:
1. We separate the broken train completely.
2. We wash off with acetone the remnants of the conductive glue with which the loop was originally glued.
3. Abundantly apply a good flux to both the ribbon cable and the board (I have RMA-223-TF) and tinker with a soldering iron using the small “miniwave” tip, which I wrote about earlier. The tip collects all excess solder on its surface - there are no closed contacts.
4. We wash off all the flux. Small raised beads of solder should remain on the previously gold-plated contacts. It must be done carefully in order to get the same tubercles as possible.
5.We apply a very small amount of the same flux, combine the contacts on the loop and on the board, evenly heat posting.php? Mode = quote & f = 181 & p = 12617 with a thermal air. The solder melts, the plume floats and, under the action of the surface tension of the solder, finds its place by itself (like a BGA chip). At the same time, the plume softens from heating and takes on an ideally flat contact surface (when it is first separated, it is deformed). Due to the transparency of the loop, it is possible to draw conclusions about the presence of short circuits between adjacent contacts. I did it the first time without them. The train is made of a material similar in appearance and properties to polyamide or Kapton tape. At the melting point of the solder, it simply becomes softer, but does not change its linear dimensions.

Tried it on a broken matrix with nothing to lose. Now I will try on a working, but defective matrix from the previous post. I will try to take a photo.

Once again I was convinced of the need to purchase a microscope.
Taken from the site of Sergey from Kramatorsk
I wanted to send it yesterday, but the site does not allow me to write messages often

Maybe someone else would have repaired the matrix yesterday.

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.Do-it-yourself TV repair is a responsible business, since today a large number of different models (LCD, LSD, CRT) are presented on the market, each of which has its own technological features. Therefore, the approach to each type of TV is individual; in some cases, special skills will be required (knowledge of electronics, experience with a soldering station).Before proceeding with the repair of television equipment, it is necessary to find out the cause of the problem.The most common problems are:

Faint, barely noticeable picture - such a breakdown happens with LCD / LCD monitors. The most likely cause of the malfunction: faulty diodes, device backlighting.

There is no sound, the screen "wheezes" - most likely, the sound amplifier or microcircuit is out of order. Also read what to do if there is sound, but there is no picture.

Monitor is on, no picture - Perhaps the cause of the problem is in the video processor or in the receiving unit.

Screwdriver Set;

hex keys (in rare cases);

pliers;

soldering station (for repairing modern monitors);

screen layout (can be downloaded on the Internet);

multimeter;

oscilloscope.

The TV may not function due to lack of power, to check this, you need to do the following:

Open the back cover of the LCD TV with tools.
Disconnect the wires that are connected to the device matrix.
Connect a working light bulb to the contacts.
Some panels have more than one light source, in which case they must be tested as well. This can be done as follows: pull out the TV matrix and connect it to the network, it will immediately become clear which lamp is out of order.

Each manufacturer has its own weak points, so below is a selection of the most common LCD screen breakdowns.

DIY Philips TV repair is recommended if the problem is minor: settings are lost, cable replacement is required.

As well as in the case of other LCD models, if the problem is serious, then it is not recommended to repair an LG TV with your own hands, it is better to contact a specialist.

The main problems with CRT devices:

the CRT TV does not turn on - just like on devices of a different type, first of all, you need to check the integrity of the fuses;
a diode bridge malfunction is a common problem with CRT receivers, you can fix the TV only after making a "ringing", you will need a multimeter from the equipment;
breakage of the posistor is considered the most serious problem; in order to check, it is necessary to turn off the power circuit of the TV, then start it again. After, observe the lamp, if it goes out, it means that the posistor is out of order. First of all, you need to adjust the resistance of the network, and then replace the part;
burnout of a transistor or capacitor - such a malfunction can be easily replaced by visual inspection (on black carbon parts), repair is carried out by replacing the part.

Below is a list of problems encountered by owners of CRT TVs.

The Rubin TV buzzes loudly when connected - most likely, the photodetector needs to be replaced.
The ruby does not turn on, the indicator does not light up - voltage surges in the transistor.

The Horizon TV does not have a blue tint, as well as the white balance is disturbed - this is mainly due to a break in the resistor.
There is sound, no image - the cause of the problem lies in poor contact of the power connector of the screen board.It is recommended to use a soldering iron to solder the harness into the Horizon TV board.

The screen does not turn on - there is a problem with the power supply.
A horizontal strip appears on the monitor - repairing a Vityaz TV consists in fixing a problem in the frame scan microcircuit.

Since the malfunction of the power supply is one of the most common problems of all types of TVs, it is necessary to study it in more detail.

Since all models of LCD monitors do not have fundamentally different design differences, therefore, the diagram below can be applied to all TVs (Toshiba, Horizon, Samsung, Sony, Rubin).

Repair of monitors equipped with a picture tube, for example, such as (ruby, sharp 2002sc, sony trinitron, vvk), as well as repair of Samsung TV, Panasonic. always starts checking the power supply.

Video (click to play).