Is it possible to repair a plasma TV after an impact?

Long gone are the days of CRT televisions - they have been replaced by LCD screens.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 is an LCD TV screen?

You need to understand that the most important part in the design of a TV is the matrix. The operation of this component is ensured by a huge number of particles, so-called liquid crystals, enclosed between thin glasses and semiconductors located around the perimeter of the screen. While the TV is operating, each of these particles reacts to an electrical signal and, depending on the given need, acquires the desired color. In turn, the electrical signals are controlled by the driver of the flexible cable, which is built into the screen. The result is the image we see.

How to check the backlight

The simplest and most effective method is already indicated above. If you can see an image on the screen when you shine a flashlight through it, you don’t even have to look for other problems. Decoders, power supply system, signal loops, graphic processors and other key components are working normally. The problem has occurred in the backlight or its control unit.

To check the backlight, you need to remove almost everything from the TV. But all this can be done carefully and quickly. Checking the backlight consists of two stages.

1. You need to make sure that voltage is applied to the diode structure. This problem is solved by the LED driver, a separate circuit of the TV power supply. If there is no voltage at its output, the backlight will not work.
2. If there is voltage on the driver, and during inspection no areas of local overheating, fallen off conductors or damage to current-carrying paths are found, proceed to checking each of the crystals.

Although the work will require special equipment, its operation requires only minimal knowledge and skills. The list of equipment includes a multimeter, a soldering iron (air soldering station) and sharp probes. But the scope of knowledge is somewhat broader. The repairman will need to be able to check the parameters of sections of the circuit. It would be useful to know about the basic voltage values ​​with which semiconductor crystals operate. You will also need accuracy, dexterity and confident soldering skills with an air dryer. Therefore, if all this is not available, it is not recommended to start self-repair. It is better to contact the service for qualified help.

What do you need to know about matrices on TV?

Give us a call. THE MODEL NUMBER IS LOCATED ON A STICKER ON THE BACK OF THE TV. The so-called nameplate. Looks like this: Do not try to read the model number from the box or documentation. Often the model number is partially reflected there, or is written for several models with different screen sizes at once. 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.

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.

CRT TV won't turn on

For CRT TV, you need to ring all the details of the power supply in the following sequence:

DAEWOO 21V1T with a malfunction - the TV does not turn on.

Upon inspection, I found only a blown 3.15-amp fuse, soldered in a 95-watt incandescent lamp instead and turned on the TV. The light bulb lit up brightly and did not change its brightness even after 30 seconds. (The time required to warm up the posistor in the kinescope demagnetization system.)

I disconnected the kinescope demagnetization system from the system board and turned on the TV again. The incandescent lamp went out, and standby voltage appeared in the circuit. This means the problem arose due to the posistor. Having replaced it, the TV turned on.

LG 21FC2RG TV on MC-059A chassis does not turn on

Since specific squeaks and clicks were heard from the power supply, it was clear that it was working under serious overload. Having checked the +B circuit (110V), I found a short-circuited diode D226.

But don’t forget to rejoice, the problem may also be in the line scan unit. By disconnecting jumper J812, the short circuit from the diode disappeared. But after checking the line transistor Q401, having previously dropped it, I found the true cause of the short circuit.

Since line transistors usually do not burn out, I went further along the circuit. During a visual inspection near the anode terminal, TDKS saw carbon deposits, replaced it and the lineman was convinced that the TV was fully operational.

LG 21FK2RG-Z4 on CW81B chassis

with the same problem.

Temporarily replacing the discovered burnt fuse with an incandescent lamp, I turned on the device. Due to the long-term bright glow, I decided to turn off the posistor. A duty room appeared on the diagram. After replacing the posistor and fuse, the TV started working

Having opened the faulty radio component, I saw severe destruction of the internal elements, which caused a short circuit.

LG 21FS2CG, assembled on chassis mc-059c

won't turn on

When you try to turn on the TV, you hear characteristic clicks from the power supply. After checking the line transistor C6090, I figured out the culprit. I also checked C414 in its drive circuit; it was almost twice as different from the nominal value. Having replaced them with similar ones, I was convinced that the device was working properly.

Rainford TV5555 on chassis 11Ak30A4

– When you try to turn on, the TV makes a squeak and goes into standby mode.

Having noticed a swollen capacitor C623 47uF at 160V, I replaced it with a new one. After ringing the line transistor BU808DF, I discovered that its emitter junction was ringing in both directions. Just in case, in addition to the line switch, I also replaced capacitance C613, since it is in the drive circuit of the transistor.

LCD TV does not turn on

The power supply for an LCD TV can be:

Repair of LED TV Elenberg E39Q2510A – does not turn on. What can be done? (BRAVIS LED39A20, ELECTRON 39-985).

For more details, watch the video guide:

https://youtube.com/watch?v=suB134BsGCA

Repair of LCD TV Samsung LE32R81B – does not turn on:

Saturn TV LCD32T was delivered for repair

with the “Won’t turn on” fault. According to the owner of the equipment, recently the TV turned on after about 5 minutes, then after 10, now it does not go into operating mode at all.

After disassembling the device, first of all I checked the power supply, I did not find any swollen capacitors, all voltages were normal. Therefore, I suspected that the firmware had failed, since I did not have a new 25Q32FVSIG flash drive, so I decided to flash my own one. I downloaded the TV firmware from here.

After flashing the firmware with the programmer, the TV started working.

Damage warning

It is impossible to argue that prevention is the best defense. Manufacturers have already created many methods of protection. One of them is an acrylic screen protector. Its advantage is that, unlike TV screens themselves, they can be exposed to water, scratches or even light impacts.

Important! This type of screen will help protect the original panel from mechanical damage, which is extremely important, as well as from dirt and dust, which is considered the enemy of nanotechnology.

So, if you want to protect your plasma TV from damage, and even more so if the cost of the equipment is quite high, we recommend purchasing this protection option. An acrylic protective screen is very useful and necessary in a house with children, because one careless movement can lead to large losses.

Important! If the resume of the technicians from the service center is unambiguous - the panel cannot be repaired, you will have to buy a new TV. Our reviews will help you choose a high-quality model and place it correctly in the room:

• The best LED TVs 40 inches.
• Which TV is better - plasma or LCD or LED?
• At what height should I hang the TV?

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.

Problems when replacing the matrix

If you decide to change the matrix, you should adhere to several important points:

1. This procedure cannot be performed at home, much less independently. You need to take your broken TV to an experienced technician for repair.
2. When transporting, it is recommended to keep the plasma panel in an upright position. This will help avoid improper redistribution of the load on one side. That is, often in order to transport the damaged TV, a passenger car will not be enough for you.

Important! The convenient thing is that today you can easily call a technician to your home, who will help diagnose the magnitude of the problem and determine whether a plasma TV can be repaired if the screen is broken and whether the matrix needs to be changed. The company will also help you independently deliver your TV to the service center and back, observing all the necessary transportation rules.

The TV broke under warranty, how to return it?

Posts and comments from readers of the site posted without editing. The editors reserve the right to remove them from the site or edit them if these messages and comments constitute an abuse of freedom of media or a violation of other legal requirements.

Experts recommend transporting such equipment only in an upright position and avoiding any tilt angles so as not to cause overload. If the seller does not have the goods necessary for replacement at the time of presentation of the demand, the replacement must be carried out within a month from the date of presentation of such a demand.

Is it possible to change the matrix yourself?

. This can be quite a difficult job, and if done incorrectly, it can lead to additional damage to the TV, electric shock, and other problems. Additionally, it can be difficult to find parts, especially at a price that justifies the cost of repairs.

The cost of replacing the matrix is ​​one of the most expensive types of repairs. If your TV is not covered by warranty or insurance, you may want to consider purchasing a new TV. The spare part itself and the services for replacing it may turn out to be equal in cost to purchasing an equivalent TV (or even a newer model).

Common breakdowns of popular brands of LCD TVs and how to fix them

Many problems with LCD screens can be easily resolved on your own. But you should know that these screens require more careful handling than, for example, CRT TVs.

It is possible that the TV is not functioning due to a lack of power, to check this, you need to follow these steps:

1. Open the back cover of the LCD TV using tools.
2. Disconnect the wires that are connected to the device matrix.
3. Connect a working light bulb to the contacts.
4. Some panels have multiple light sources, in which case these must also be tested. This can be done as follows: pull out the TV matrix and connect it to the network, it will immediately become clear which lamp has failed.

Once a faulty lamp is detected, it must be replaced. This procedure must be performed as carefully as possible. In most cases, the lamp can be reached even without removing the matrix - you need to move away the protection elements and remove the burnt-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

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

Often users of this brand encounter such a problem that when turned on, the device beeps continuously. This symptom usually indicates that a leak has occurred. It is recommended to try replacing the pre-output stage diode.

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

READ MORE: Features of kitchen renovation in Khrushchev

Owners of LG flat screens may have trouble saving settings. This problem does not require contacting a specialist; you can repair an LG TV yourself. It is enough to switch the device to another operating mode, and all settings will be saved.

Below is a list of problems that owners of CRT TVs encounter.

Ruby:

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

Horizon:

1. The Horizon TV has no blue tint, and the white balance is also disturbed - this is mainly due to a broken resistor.
2. There is sound, but no picture - the cause of the problem is poor contact of the power connector on the screen board. It is recommended to use a soldering iron to solder the harness into the board of the Horizon TV.

Knight:

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

Before you start repairing your TV, you first need to make sure what the problem is. This will also help if you carry out the repairs yourself, and then when the technician arrives, you can explain the situation to him.

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

The equipment does not turn off. Whether a CRT TV or a modern LCD model has broken down, this malfunction is associated with a blown fuse. Only different models have details that are distinctive from each other.

You should also pay attention to the diode bridge - perhaps it was the one that burned out. In both domestic and imported models, the potential for which the posistor is responsible can often go astray. If the monitor of a plasma TV is broken, then the problem most often lies in interference or changes, light or dark stripes may appear, and the color changes while watching a program or movie. The problem may also be a broken cord or a faulty socket.

If we take into account all the troubles listed above, it is worth saying that the most complex breakdown is considered to be a screen malfunction. For example, light reflections appear on your monitor after liquid gets on the matrix or the TV is hit, then it is better to take it to a television service

Here it will definitely be repaired, and if the warranty period has not expired, then it will be repaired free of charge or at a reduced price.

Plasma TV screens: components

You need to know how the part works in order to quickly understand the repair features. The screen design of modern TVs has the following features:

• There are small liquid crystals all over the surface.
• These crystals are located between two glasses of minimal thickness.
• The components react when exposed to electrical signals.
• This is how certain colors appear, together forming a single system.

Each of the crystals has a special driver responsible for control. The drivers are located on flexible cables mounted in the glass.

Signs of microcracks

A large crack on the TV screen will be immediately visible. But how to identify those that are practically invisible in appearance? There are additional “signals” for this. The following manifestations will indicate that microcracks have appeared on the device:

• color rendition is distorted in a separate area or across the entire monitor;
• stripes appear;
• local cloudiness occurs;
• there is a clearly visible oily trace at a specific point.

Small cracks can be seen from certain angles, so they are not noticeable at first. In this mode, the device can work for some time, but then image defects will appear more often, or the picture will disappear altogether (other functions will work). If this happens, contact a service center engineer who will accurately determine the cause of the malfunction.

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 with built-in LEDs, which are located in cables that cannot be installed. In this case, the situation cannot be corrected.

Video material

We hope that after studying the material from this article, weighing all the positive and negative aspects of ways to solve the problem, you will be able to personally make a choice for yourself, change the matrix, reconfigure or purchase new equipment. The answer to the question whether it is possible to repair a plasma TV if the screen is broken remains quite ambiguous and requires consultation with an experienced technician. Be careful and if you purchase an expensive plasma TV, protect it. We would like to avoid such situations and long-lasting equipment in the future.

If the LCD receiver is broken

LCD and LED panel screens are also made in monoblock format. They are a liquid crystal matrix with RGB filters, placed between two thin glass panels and backlighting, the intensity of which is controlled by supplying current through a special conductive cable. The slightest crack in the inner or outer glass causes damage to the connections in the crystal matrix, and this means that the screen is broken.

Restoring the complex structure of the LCD TV matrix is ​​not possible due to the complexity of producing TV screens. There are also no replacement parts available and no repair plans for damaged screens. to fix a broken LCD TV screen.

On a note! Some models of such panels can be equipped with additional protective glass, which can crack if hit by a toy or ball, but the matrix will remain intact. Cracked glass can either be replaced or removed at a workshop so that it does not interfere with viewing.

Repairing an LCD TV screen means installing a new matrix in place of the damaged structure, or replacing the protective glass. Such work is carried out only in a specialized workshop. As with plasma, replacing the display is expensive.

How to protect your device from accidental damage

If the TV is not equipped with display protection from accidental mechanical impacts, you can take care of this yourself. Acrylic protective screens are produced separately, and you can purchase a product of a suitable diagonal to install on an expensive TV panel.

The option of installing protective glass on the TV panel will not affect the image quality, but will protect the matrix from moisture, dust and other mechanical influences. True, such protection will not protect you from damage in the event of a fall. To prevent the TV from falling, it is recommended to properly mount it on the wall using a special bracket.

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.

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.

When do you need to change the matrix on your TV and is it worth it?

The need to replace the matrix is ​​usually associated with careless handling or improper adherence to operating rules. It will not be possible to carry out repairs on your own, as this is a very painstaking work, and only a professionally trained specialist can perform it. And sometimes it’s even easier to buy a new TV if you can’t contact a specialist.

Usually the breakdown is expressed as follows:

• Instead of an image, you see vertical stripes of different colors;
• There are streaks and horizontal stripes on the screen;
• Dark circles appeared on the screen;
• Small specks of various colors are displayed on the screen;
• The image disappears partially or completely.

If you encounter at least one such symptom, you will need to replace the matrix.

Main sources of failure

A crack on a TV is the result of mechanical external influence, which can occur in the following situations:

• someone knocked the device during careless transportation;
• The TV fell from a cabinet or table;
• the child accidentally hit it with a ball or other toy;
• an overly active pet turned the TV on its stand with the display facing down;
• Due to poor quality wall installation, the panel fell to the floor.

There can be many sources of defects on a TV monitor, but the result is the same - a violation of the integrity of the monitor, distortion of the image at the point of impact, or a complete absence of the image.

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.

I bought a TV in Eldorado, the screen was broken at home, the warranty is given or repair

TS, I can only give you one piece of advice, which I used myself once a long time ago. But it only works if the TV is relatively new release date. Looking for someone from the service center. And you agree with him that he carries out this as a guarantee case, but you will pay him for the dough matrix. In 2014, at those prices, the TV cost 24 thousand, I paid 8 thousand for the matrix, which I broke by accident.

He is familiar with the company's rules, as well as the current requirements of the Consumer Protection Act (CPLA).

It is important for everyone who buys durable goods (primarily many types of household appliances) to know a valuable rule: if the product fails due to a manufacturing defect, the consumer has the right to make claims after the end of the warranty within the entire service life of the product. Unauthorized use of materials is prohibited. Reprinting is possible only if the user agreement is fulfilled.

The law does not provide for any “checks” or “diagnostics”. You hand over the goods and demand that the defect be eliminated (repaired).

The very fact of exceeding the repair period of 45 days is a significant defect of the product, giving the right to demand a refund. Moreover, the inability to use the product within 30 days of the one-year warranty period is a significant drawback of the product.

If horizontal stripes appear on the screen and the image periodically freezes, an electrical breakdown of the matrix is ​​to blame. If water gets on the matrices, dark spots in the form of circles may form on it. If the TV matrix malfunctions due to water ingress, vertical stripes resembling colored streaks appear on the screen.

Front access

The screen can be separated from the matrix by protective glass. If the screen is damaged, the glass must also be replaced. Replacing the TV screen is carried out in the following order:

1. Carefully press out the fasteners holding the cladding in place.
2. Unscrew the screws that connect the matrix on the TV to the body.
3. Check the device for additional latches and carefully release them.
4. Remove the fasteners from the back wall to gain access to the inside of the device.