Long gone are the days of CRT televisions - they have been replaced by LCD screens.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 does the screen consist of?
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. Together, tens of hundreds of cells create the image that the TV shows.
The entire screen structure is located in a small space between two planes, which are made of durable glass. To understand whether the LCD screen is broken, you need to understand how the breakdown occurred.
Damage to the cable and glass leads to the need to completely change the matrix.
For the home with your own hands
An interesting idea is to turn an old picture tube into a window for outbuildings, a country shower, or a toilet. Preparatory work begins with creating a hole to depressurize the vacuum and not provoke an explosion. You need to insert a screwdriver into the connection point of the high-voltage contact and tap it. When the hissing stops, the kinescope will no longer pose a danger.
Next, use a grinder to cut off the top part. It will no longer be useful, so we throw it away. Use a screwdriver to pry it off and remove the mesh. This piece with small cells can be used on the farm as a sieve.
We thoroughly wash the glass itself under running water and insert it as a window. A pavilion can be built from a large number of such items. Don’t forget to wear goggles, gloves, and a respirator when working with an angle grinder.
An old TV is a treasure trove for using your imagination. You can use different techniques for decoration: decoupage, craquelure. Or leave the rarity in its natural form if you like vintage.
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 that have built-in LEDs, which are located in cables that cannot be installed. In this case, the situation cannot be corrected.
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.
The cost of LCD repairs at the Elemont+ teleworkshop
In order to place an order for TV repair or monitor repair, you must provide basic information about your device: its name and model, diagonal, and what the problem is. You can always place an order by phone or simply by sending an application electronically.
The prices for repairing LED TVs will depend on the screen diagonal of your TV (monitor). The diagonal can be clarified by the hardware model (the first digits are the matrix size in inches). Or simply measure the screen diagonally with a tape measure. You will get the result in centimeters, and dividing the result by 2.54 (1″ = 2.54 cm) - in inches.
| No. | Equipment type | Diagnostics and repair, rub. |
| 1 | ||
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.
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.
Possibility of using hotel TV parts
The options for further use of a faulty TV are not limited to the lamp alone. After all, it contains many useful parts that can be used.
- You can use radio channels as an all-wave receiver .
- The metal back housing perfectly conducts, distributes and dissipates heat. Therefore, it can be used to make an energy-efficient infrared heater. To do this, you will need to connect a carbon heating cable for underfloor heating to it.
- The brown board can be re-soldered and used as an element of an audio amplifier .
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.
Our service center is often contacted with the problem of a cracked TV screen. The most common cause is mechanical damage to the TV matrix as a result of an impact or equipment falling to the floor. As a rule, the main culprits of such breakdowns are children or pets (most often cats).
Here is one example of children and pets playing. The child was chasing a cat around the apartment and ended up knocking over the TV. A very decent device, model LG 55LA690V-ZB, was damaged. At one time, the owners of this equipment paid almost 2 thousand US dollars for it. And it took just a few seconds for a runaway child and a cat to turn it into trash...
We cannot convey all the grief and anger that wafted from the parents of a sloppy child and also the owners of a cat. First of all, we asked them not to move the cat to another place of residence, which is intended for the disposal of municipal waste (garbage dump). And also do not apply harsh measures to the child.
Before us, they addressed this problem to one of the official services of the manufacturer of the damaged equipment (LG). It announced the cost of replacing the matrix - 1,400 rubles (about $700). The funny thing is that the real cost of such a panel on online flea markets like “Online” or “Kufar” rarely exceeds 1000 rubles (500 US dollars). Having contacted our suppliers, we found out that no one would ship such a matrix to us at a price below 1,200 rubles (600 US dollars).
You probably have a lot of questions swirling in your head that are related to this kind of screen breakdown. In this article we will try to answer your questions as informatively as possible in the form of a question and answer.
Is it possible to repair a cracked TV screen (matrix) or is only an expensive replacement left?
Unfortunately, screen repair is not possible. The design features of the screen do not allow eliminating mechanical damage. The only option to restore the TV's functionality is to replace the panel.
Conclusions: repairing the matrix is not possible; unfortunately, the only option left is an expensive replacement.
Where does such a cosmic cost of replacing a TV matrix come from?
As a rule, the price of the matrix of the total cost of TV is 80 - 95 percent. This is due to the fact that the production of the matrix itself is a very expensive thing. The cost of a screen manufacturing plant ranges from 2 to 10 billion US dollars depending on the generation of production lines and their technological capabilities. In addition, the panel itself is a large item - therefore, the cost is significantly affected by high logistics costs. Due to its size, large storage facilities are required, which again entails increased costs.
Conclusions: the matrix cannot be cheap and its cost is 80 - 95 percent of the cost of the TV.
From the information presented above, another question arises. If the matrix costs 80-95 percent of the cost of the TV, then in practice its replacement may cost more than the cost of such a working TV at a flea market?
Everything is very simple here. The only supplier where you can order a matrix for a damaged TV without any problems is the manufacturer of the damaged equipment itself. Provided that he has warehouse stocks of the required spare parts. When shipping the matrix, the TV manufacturer relies on its purchase price. In simple terms, it looks at how much it cost the company. Naturally, the production/purchase of the required matrix model occurred at the same time as the production of the TV. But several years have passed since the production of the TV, and the TV that includes a broken matrix has lost in price. And the manufacturer produced (purchased) this matrix at the time of TV production (at the peak of price).
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:
- Open the back cover of the LCD TV using tools.
- Disconnect the wires that are connected to the device matrix.
- Connect a working light bulb to the contacts.
- 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:
- 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.
Horizon:
- The Horizon TV has no blue tint, and the white balance is also disturbed - this is mainly due to a broken resistor.
- 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:
- 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 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.
Video of a broken TV: Broken TV screen Samsung UE40J6200AW
P.S. We apologize for the somewhat humorous nature of the article.
The article was prepared by an engineer with 20 years of experience in repairing electronic equipment, V.A. Zhdanovich
… HERE
Did our friend have a question here?
(I was told this is needed in the DIY community
) What can be done from a faulty LCD TV display?
Yes THING!
it can be done, and it’s worthwhile! I’m just giving a quick and accessible hint: ( since I’ve already done this
) The LCD TV is disassembled, all the boards are pulled out, the glass is disassembled and removed (if it is broken), “there is a multi-layer cake” can be realized by almost everyone.
How to implement all this? Elementary! LED strip for illumination at the ends or behind.
And then you stuff everything from your imagination with ribbons. You also need: a power supply, a tape control unit - an RGB controller.
you can use fluorescent lamps, it all depends on what you found and what you want to do.
I don't claim originality
But I personally verified it a very long time ago.
(boasted) so here it is: Lighting for the aquarium background
plants grow amazingly. Aquarists know: the influence of COLOR on plants. Just a beautiful lamp, for example in a hallway or hallway.
In the garage for the workplace - lighting, then I think one color is white. Although if with a glass of tea, and... it will be... very intimate...
At work I have such a lamp behind the back wall of the aquarium from the monitor on Monday, I’ll take a photo.
Very beautiful!
How did you come up with it? About 10 years ago, “My friends from a sunny country” brought me a huge, expensive LCD TV with a plug sticking out of the display for repair. They were a very large group of him - They washed it... - I felt sorry for them, I felt sorry for the TV, A replacement would be very unprofitable for them, they struck: 80% of the cost. That's when they just gave it to me...
I struggled for a long time with what to do with it, boards, parts, sell it or use it for its intended purpose - donors, there was no problem. display? .
...so I made a lamp and gave it to my friends.
And my work then paid off with components.
So before you throw anything away...
We were born in a country where everyone’s hands are itching to do something! (Added:) (Here's another thing: what can you do with COLOR MUSIC! I need to try it, there are a couple more TVs lying in the garage.
Or maybe someone has already come up with something else that would be great to use. By the way, new TVs won’t work...
Thank you! All the best to the brave solutions!
Go ahead! break TVs
