Self-replacement of the matrix on an LG TV

Liquid crystal devices have long been firmly established in everyday life. LCD TVs, electronic alarm clocks and smartphones - each device represents a brilliant achievement of human thought. A breakdown can lead to a situation where it is cheaper to buy a new one instead of a faulty model.

However, in some cases, it is possible to successfully repair the TV matrix by replacing failed parts.

Matrix cost

Replacing the screen can be expensive. To find out how much a matrix costs, check the specifications of your device.

The price of replacing TV matrices starts from a thousand rubles and increases depending on:

• screen diagonal sizes;
• models;
• spare parts manufacturers;
• type of fault;
• repair company price tags.

To reduce costs, you can repair your TV yourself.

Restoring an LCD TV at an authorized LG service center

After the equipment arrives at the service center, the technicians carry out diagnostics. Before starting restoration work, the manager is obliged to notify the customer about the problem found and the total cost of the services. The company’s own warehouse of components allows engineers to carry out urgent repairs of LG LCD TVs in Moscow.

The work stations of the craftsmen are equipped with professional equipment - hot-air stations, microscopes, multimeters, pyrometers and laboratory power supplies. Refurbished LCD TVs are thoroughly tested after service. The capabilities of TV are growing every year, so we regularly conduct internal courses for staff. The qualifications of each employee are confirmed by an official LG certificate.

What is an LCD matrix and its malfunctions

Liquid crystals - what are they? This is the name of the phase into which a substance passes when certain conditions are met. An electric field can change the orientation of LC molecules. It is this property that has contributed to the widespread use of liquid crystals in the industrial sector. Liquid crystals were discovered in 1888 by Friedrich Reinitzer.

However, the use of liquid crystals was found only in the 60s of the last century. American scientists have proposed using liquid crystals as a matrix element in information display devices. Under the influence of voltage, the LC molecules are ordered and form the required image.

What is a matrix on a TV? The Matrix is ​​a system of conductors of electricity. It consists of thin and transparent electrodes located vertically and horizontally parallel to each other. The electrodes form a square-nested network that supplies voltage to the substance contained in the device. Repair of the TV matrix may be required if, under the influence of voltage, structural elements gradually fail.

Modern LCD displays are equipped with a backlit monitor, and the matrix cells have color filters. When the backlight fails, you can replace the damaged diodes.

What can be the malfunctions of the LCD matrix:

• Physical damage or exposure to moisture. As a result, electrical breakdown of the matrix occurs. The image shifts and freezes. Water that gets inside forms black circles. As a result of corrosion, multi-colored vertical stripes may appear. In this case, replacing the screen with a new one is mandatory.
• Discharge defect. Formation of grainy goosebumps.
• The backlight lamps are damaged. Looks like patchy screen blackout.
• Incorrect fastening. Panel sagging due to the TV's own weight.
• Microchip malfunction.
• The cable with the control drivers is damaged.
• Backlight malfunction.

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Frequent signs and causes of malfunction

A malfunction of the TV screen can be caused not only by mechanical force; often something inside burns out and fails. But still, as real practice shows, most often, repairs have to be carried out due to scratches, chips, or the TV falling from a height, which leads to the screen being completely broken.

If the scratches on the screen are tiny and do not greatly affect the work, then you can put up with this, but the broken screen will still have to be replaced, entrusting this matter to the best professionals.

Replacing the matrix

How to change the matrix on a TV? To successfully carry out repairs yourself, follow the instructions and remember the sequence of your actions. You can take a photo of how the wires are secured to the TV matrix, or film the process on video.

Repairing a TV matrix involves purchasing and installing new parts to replace failed ones. The liquid crystal matrix is ​​thin and fragile. Carefully control your movements to avoid damaging expensive parts.

IMPORTANT ! Replacing the matrix on a Sony TV is not necessary if the problem is burnt-out driver cables. These loops are often printed on thin film, with tracks of tens of millimeters. The repair center will rightly note that the matrix on the device will need to be replaced. To repair the TV matrix in this case, you can simply try disabling the channels on the device driver. Repairing drivers for a Samsung TV by soldering is possible if the drivers are not printed on film.

To replace the TV matrix, you need to disassemble the device. The screw fastenings are easy to unscrew. However, if the integrity of the device is ensured by hidden latches, you should handle them as carefully as possible. Repairing a TV matrix requires a careful approach.

LG TV repair

Orbita Service repairs LG TVs in Moscow and the Moscow region. At the customer's request, repairs are carried out at home or in our stationary workshop. A repair request can be made by phone.

A well-known South Korean brand that has captured all segments of the production of LCD and plasma TVs, from budget to HI-END class. A feature of repairing LG plasma TVs is the high maintainability of more expensive devices, while budget TVs often require block repairs, which negatively affects the profitability of repairs. The situation with repairing LG LCD TVs is simpler; they can be restored by replacing small components. We have the opportunity to receive parts and units directly from LG, which significantly reduces the cost of repairs. We also replace LG TV matrices from 32 inches to large plasma 3D TVs with SMART function. Matrices are divided into FULL HD and READY, and the cost of repairing LG TVs depends on the technical characteristics. Replacing the matrix on LG devices is advisable because the company is one of a limited number of brands that supply matrices at more or less reasonable prices. LG TV repairs at home are carried out with a high success rate. In most cases, there is no need to take the device to a service center. Although modern LG LCD TVs are full of complex devices and additional sensors, they require special LG service remotes for repairs. Our engineers have all the tools and special equipment and the necessary knowledge in order not to damage such a complex device, but to repair it as soon as possible. Of course, if the owner doesn’t care whose hands his TV falls into, you can point your finger at any advertisement promising a TV repair price of a maximum of 2,000 rubles. But more often, as a result, he receives a destroyed TV set by would-be repairmen, and he also pays them for “diagnosis”, “call-out”, “details”. But it’s always better to turn to LG TV repair professionals and enjoy the restored device for many years. Repairing an LG 42LE4500 TV is one of the most difficult, since in these devices a group of backlight LEDs fails, to replace which you need to open the TV matrix, and this can only be done in a workshop. The defect appears externally as a loss of backlight and a dark image on the screen. Call us, our specialists are always happy to help you! 8 (495) 772-27-07.

Before calling, please have the model name of your TV ready!

One of the main malfunctions of LG TV models LG42LW573S and LG42LW575S is the failure of the system board. If the system board fails, the LG TV does not turn on and the red light on the front panel blinks.

Replacing the motherboard of LG TV model 42LW575

Our specialists replace and restore motherboards for LG TVs. After replacing the motherboard, your favorite LG TV will work like new!

We often receive so-called (budget) models of LG plasma TVs for repair, such as 32PC50, 32PC51, 32PC52. Most TVs of this model have a typical malfunction, the symptoms of which appear when turned on (does not turn on for a long time or does not turn on the first time) also in the image can various interferences appear that disappear as the plasma panel heats up. All of these failures indicate the need to repair or replace the power supply.

LG plasma TV power supply

Our engineers recommend not to put off repairing your LG TV if any malfunctions occur, because incorrect operation of the power supply can lead to failure of other components of the plasma TV.

LG plasma TVs last a long time after replacing the power supply

Our service has all the components and units necessary for repairing LG32PC50, LG32PC51, LG32PC52 TVs.

We often receive LG plasma TVs for repair for which it is not possible to order new units due to their discontinuation. For example, such TVs include the LG42PC1 LG42PC3 models, which are assembled on the basis of a 42V8 matrix and quite often fail.

Image with a faulty LG TV power unit

However, even in the absence of new units, we do not refuse to repair your LG TV. Our workshops have all the necessary equipment and components for restoring blocks at the component level.

LG plasma TV x-sus unit

Broken assembly causes the module to not work correctly

LG 42LW4500 TV has interference on the image in the form of green or red horizontal lines, repair at home - 2,700 rubles with parts.

Our technicians repair LG TVs at the customer’s home and in the service center. All work is guaranteed.

Modern LG TVs have a built-in complex service menu, the methods for entering which are widely described on the Internet.

It is strictly forbidden to change anything in the service in order to improve the operation of the device! There is nothing there that you can do yourself!

After repair, the necessary settings of the LG TV are made through the service mode

The photo shows an example of the service menu of the LG 47LX9500 TV

Some TV models from this manufacturer may not turn on; the red indicator blinks or is constantly on, but there is no image or sound. The LGE3556c processor is faulty and needs to be replaced in a stationary workshop using a special infrared soldering station. The repairman can come and remove the board with the processor for repair, so as not to take the whole thing to the service center. This will save your money; repairs are much cheaper than a new motherboard.

Preparing the board for dismantling the control processor of an LG LCD TV

The following models are affected by this: 32LD750 60PX760 60PX960 42LX6500 47LX9500 32LE7500 42LE8500 47LD650 50PX960 and others. Related defects of this processor: no signal from HDMI inputs, no reception of analog channels, digital interference, sound loss. Contact only specialists; incompetent craftsmen can only ruin the complex circuit boards of these TVs by heating them with a hair dryer! Repairs will be much more expensive.

After heating to 200 degrees, the processor is removed without damaging or deforming the printed circuit board.
The most common LG TV models

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.