DIY TV repair lg trinitron

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

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.

Video (click to play).

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 can only consist 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 protective 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 case. 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.

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.

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.

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.

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Normally, the component will blink and turn off after turning on the TV. It is worth noting that the performance of the device will go a little in the wrong direction.

What other components should you look out for? Let's take a look at the main situations:

The diode bridge fails. The component is engaged in current rectification. If the circuit experiences voltage swings, one of the diodes may burn out. It even happens that two diodes fail at once, so the breakdown should be determined with the help of a “dial”.
The resistor is damaged. The task of this part is to pick up the potential from the cathode-ray tube. If the component stops doing its job, a “rainbow” appears on the TV screen. In this case, a thermistor or an inductive loop can burn out. In this case, just turn off the power and use the tester to fix the problem.

Do-it-yourself CRT TV repair is the most common replacement for burnt-out components, but what about modern models?

The general guidelines should not be forgotten either. It is advisable to dismantle the main board in order to avoid the possibility of electric shock. First you need to discharge the EL tube electrode.

Important! Avoid touching metal parts during refurbishment work.

This component is located in the area of the rubber gasket:

Use a screwdriver to pry on the rubber band.
Swing the component and remove the EL tube electrode.
Touch the rod to the body of the device, thereby discharging the part. If you can find land, it’s better to use it. The most ideal option is a European type socket, into which the terminals are correctly connected.
When discharging, you should hear characteristic clicks. Discharge the component until you stop hearing them.
Each TV has a main board, which is responsible for the "control" of the equipment. Remove this part and inspect the radio components on the board.
Replace swollen capacitors, resistors, and burned-out components as needed.

Important! If you still haven't been able to repair your TV yourself, it's probably time to replace it with a new improved model. In our separate review, you will find out which brands of TVs are the best.

DIY LCD TV repair - the screen does not light up. This problem can have a solution if you know the general principles.

Cases of breakdown of such equipment are slightly similar to those described above for CRT models.Obviously, there are hardly any posistors here, so you only need to establish the cause of the backlight failure. Typically, these TVs are classified into two types:

Based on gas discharge lamps.
Based on diodes.

Gas lamps have nothing to do with the lamps that hang from the ceilings. To check the power supply, it is necessary to dismantle the back wall and visually assess the performance of the wires that go into the matrix. To do this, we disconnect them from the connector and use a light bulb to check their operation.

It also happens that the illumination is carried out by a number of discharge-type light sources. In this case, you will need to try to pull out the matrix and turn on the device, looking at which particular lamp is not working. If a failed component is found, then it will need to find a replacement.

Important! Please select accessories according to your TV model.

In some models, in general, you just need to get the lamp from the end without dismantling the matrix. The conductors are located on both sides and are covered with a special protective pad that needs to be pushed back a little. The light bulb is evaporated and a new component falls into its place.

Important! Also, when installing, take into account the position of the location: side or top. Do not overlook the cases when several fixtures are used in one cell.

If a horizontal or vertical stripe flaunts on the screen, then the root of the problem should be found in the scan electrode. We recommend that you give power to another device that has a working matrix in order to confirm this assumption.

Important! It is irrational to replace crystals in those TV models that are budgetary. Most likely, it will be more profitable to purchase a new device. You may find a suitable model in our publication "The Best 32" LED TVs.

But let's not forget about those cases when the TV is broken, but its matrix is intact. Then it is recommended to carry out repairs.

The most common breakdown is cable problems. Most often, it is simply stepped on, which leads to damage to the core or even the path on the microcircuit. A digital receiver is made in the form of a small microcircuit with a shielding coating, which is why the assembly is inseparable from the cable connector.

Before repairing such a component, you must carefully pull out the electronic component. Then you should find glue and a soldering iron, returning all the wiring to its place.

Important! When choosing a new TV, do not forget to pay attention to the screen resolution. One of the latest developments is 4k resolution. And by clicking on the link, you will find a rating of 4k TVs.

The experience of the craftsmen allows you to eliminate breakdowns of various nature and varying degrees of complexity Without video and audio equipment, a modern person can no longer imagine his life. As a result of regular and intensive use of equipment, it is subject to various breakdowns. The potential of imported and domestic TVs is very often violated. A posistor is responsible for this function. Another plasma breakdown can be discoloration, interference, the appearance of light or dark streaks during operation. But sometimes the problem might be with the outlet or power cord. This is only the most minimal description of the malfunctions, as there can be many more problems associated with the TV. Screen faults are the hardest to fix.If dark or light spots appear on the monitor after a shock or water ingress, then it is better to immediately take it to a service center, since only a technician can repair the device.

Before starting the repair work, it is imperative to determine what exactly has broken down and for this, the device is diagnosed. If the TV does not turn on, then a malfunction may occur due to a blown fuse. This applies to LCD TVs and CRTs. At the same time, as practice shows, the problem may lie in the failure of the diode bridge.

If the breakdown in the TV is insignificant, the repair is done by hand

TV repair is possible:

Produce at a service center;
Call the master at home;
Do all the repair work yourself.

Plasma TVs, in contrast to tube TVs, have many advantages, since they: have a richer image, are distinguished by a thin body, are characterized by high contrast and wide viewing angles. However, despite all the advantages, like models with a picture tube, they are susceptible to a variety of breakdowns.

All types of malfunctions that occur can be divided into several categories, namely:

Plasma panel malfunction;
Breakdown of the electrical circuit, receiver;
Problems with sockets, connectors, wires;
Dust build-up inside the device.

If the screen is broken, the image may be partially or completely missing. In this case, it will be necessary to replace the plasma panel in a specialized service center, and you will not be able to repair the TV yourself. If the TV panel is broken, you also need to replace it. If the problem is in the electronics, then the image may be distorted and disappear completely. Electronics can be repaired by yourself by re-soldering defective parts or replacing them with new ones.

However, it is imperative to have certain knowledge and skills in working with electronics.

If you carelessly handle wires, cables or connectors, certain problems can arise. Defective parts of the LED TV can be repaired, and in case of a serious breakdown, they can be replaced with new ones. The accumulation of dust inside the case can provoke the occurrence of various malfunctions, which is why it is better to clean the device in a timely manner than to repair the TV for a long time.

Repairing LED TVs at home can be quite a difficult and time-consuming task, which is why you need to pay enough attention to prevention, as this will help reduce the risk of breakdown.

Repairing LCD TVs at home is a solvable task, especially if you have basic experience in electronics

Preventive measures include:

The device must be in a ventilated area;
Dust cleaning should be done periodically;
Do not leave static pictures for more than 20 minutes.

Learning to repair a TV yourself is quite simple, the most important thing is to take into account the advice of professional masters. You can learn all the secrets of fixing LCD TVs by watching video tutorials for beginners, where everything is detailed for each brand of device.

Important! Before starting to repair the TV yourself, it is advisable to consult with a specialist, since the cause of the breakdown can be very serious and you can only cause even more damage to the equipment.

LG is considered one of the most popular home appliance manufacturers. The manufacturer is constantly improving the production of household appliances, introducing the latest technologies, which makes it possible to achieve the exceptional quality of appliances.

To determine how to repair LG TVs and other models, you first need to establish the cause of the breakdown

Basically, factors such as:

Ingress of foreign objects inside the vehicle;
Clogging;
Poor maintenance and misuse.

Before starting to repair an LSD TV, you need to prepare the appropriate tools and check the device for faults. Then you need to remove the back cover of the device and find the instructions, which will be written in Russian, so that you can study the configuration. Initially, the television receiver is inspected, and the reliability of the connection of all cables is checked. After checking the connections, you need to carefully inspect the cable equipment, because it can be the main cause of the breakdown.

If the cause of the malfunction lies in the power cord, then initially you need to replace it and only then proceed with further diagnostics of the device.

Often LSIDI TVs do not work due to a breakdown of the power supply. For the same reason, the computer can often fail. Breakdowns mainly occur as a result of excessive accumulation of dust inside the device. During the repair of an old CRT TV, you need to inspect the basement element of the picture tube. All threads must be illuminated. If you have to repair electronic devices for the first time, then the circuitry is initially drawn up.

Fixing a TV with your own hands is a completely doable task, the most important thing is to get acquainted with the peculiarities of the internal structure of technology from the beginning.

If the LED TV breaks down, two options can be assumed - either the power supply is out of order, or the backlight itself is out of order

The simplest are considered TV models such as:

In addition, among modern TVs, the Sony, Panasonic, Elenberg, Mystery brands differ in a rather simple device. Standard malfunctions are considered to be the lack of backlighting or intermittent loss of sound. In this case, it is important to determine the performance of each individual element. On TVs Supra, Samsung, VVK and others, the LEDs located on the tape often burn out. The issue is fixed by replacing them. The reason for the burnout of LEDs is mainly the constant overheating of the device and its operation at a critical temperature regime. In addition to replacing the LED, it is also important to align the heatsink as this allows for better heat dissipation.

The high reliability of the Philips brand TV guarantees its long service life, however, in some cases, various types of breakdowns may occur. Philips brand technology is of high quality and difficulty in eliminating breakdowns, since the device is characterized by the peculiarity of parts, in particular, such as a transformer.

If the indicator on the Philips TV flashes, it means that the TV itself diagnoses the type of problem

The most common types of malfunction are such as:

Lack of sound;
Blinking, intermittent disappearance or complete absence of a picture;
Image distortion;
Lack of response to commands.

In the case of a broken matrix, it is best to purchase another TV, as it will be very expensive to replace it. If you do not have sufficient experience in carrying out repair work, then you can watch video tutorials or entrust the elimination of malfunctions to specialists.

Video (click to play).

LCD TVs are a very reliable and functional device, however, if used improperly, if dust and foreign objects get in, as well as in the case of defects and many other problems, various kinds of breakdowns may occur. You can easily eliminate many types of plasma faults on your own, the most important thing is to first study the device of this type of technology.