Is it possible to repair your LCD TV
What to do if the screen is broken and there is a crack on the TV?
All masters undergo obligatory medical control before leaving. Make repairs while wearing a mask and gloves.
Call a master
It’s easy to leave a request for professional repair. fill out an online form or call us by phone:
Masters SC “A-Aisberg” performs TV repair of all popular brands (from inexpensive LCD panels Toshiba, Supra, Philips to the top models LG, Sony, Samsung). Diagnostic and repair work is carried out at home in the presence of the client (without taking the equipment to the shop). To call the telemaster for a specific time, call 8(495) 213-33-33 from 7:00 to 23:00 on any day of the week (without days off), or leave an online application on the site with contacts for feedback.
What the screen is made of
The main component is the matrix. It contains a huge number of particles that are filled with xenon and neon. The matrix around the perimeter is framed by semiconductors. The phosphors begin to glow when the UV-luminescence is created by an electric current that passes through a medium of gas. This process causes the cell to glow the desired color. All together, dozens of hundreds of cells create the image that the TV shows.
The entire structure of the screen is located in a small space between two planes, which are made of durable glass. To understand if the LCD screen is broken, you need to understand how the breakage occurred.
Damage to the cable and glass leads to the need to completely replace the matrix.
AND THEN WHAT DO WE DO?? The only thing left to do is to sell the TV for parts.
The easiest solution to this problem would be to sell such a TV for parts. We can buy your broken TV at which differ in a greater way from the price which will be given by resellers for the same TV. And you on the proceeds commemorate your electronic friend who served you faithfully.
P.S. Please excuse the somewhat humorous nature of the article.
The article was prepared by Zhdanovich V., an engineer with 20 years of experience in repairing radioelectronic equipment.А
There is no backlight, but you can see the image
There is a 99.9% probability that the cause is a malfunction of the backlight bulb of the matrix, designed to backlight the LCD screens. This LCD TV failure is the most common. The cause of LCD TV backlight bulbs failure is a small service life of the bulbs (this is especially true for low cost models of LCD TVs).
Repairing this kind of failure is usually quite time consuming and expensive. The thing is that you need to disassemble the LCD matrix, which requires precision and accuracy. Also, if the backlight or inverter requires replacement, and they are not available in Kharkov, we have to order the necessary components for replacement in China, which increases the time of repair work in times.
Repair costs for a broken TV screen
What are the causes of failure of the LCD TV screen? Problems with the display can arise for the following reasons:
What are the symptoms of malfunction TV screen? Customers turn to us in the following cases:
- It is impossible to turn on the device;
- The appearance of stripes on the display;
- Cracks, scratches, etc.;
- Picture Quality Deterioration.
These all signs are the most common for all types of TV failure. Only professional diagnosis will help to determine the true cause of the problem. Our experts will never do the repair equipment without a thorough inspection of the TV. Diagnostic costs and repair costs of the TV screen in Kharkov suit our customers. Most customers are happy to work with the company.
Accidentally hit the screen? Cracks appeared?
Screens of modern LCD and LED TVs in most cases do not have additional protective glass, except for the regular two components of the display, between which the liquid crystals are placed to form the image. The thickness of the outer glass of the display of medium diagonals is measured in tenths of a millimeter. For comparison. Standard window glass is 3 mm thick. The necessary margin of safety is achieved by the quality of glass, and if the surface of the panel (matrix) is not exposed to shocks or excessive pressure on the screen, mechanical damage usually does not occur by itself.
But, nevertheless, we often hear from owners about this complaint:
The answer in all similar cases is unambiguous. The panel cannot be restored and must be replaced.
Sometimes accidental strike on the screen with a child’s toy is enough and the TV can get in the category of unrepairable, for the reason that on some panels you can not find a replacement, or its cost with the shipping and installation can be more than the price of the TV.The cost of replacing the panel can be clarified at the nearest Authorized Service Center (ASC) for a particular brand on your model of TV. Usually addresses and phone numbers of such dealers in all regions are listed in the documentation that came with the purchase. warranty cards or user manuals.
Commercial workshops do not usually practice replacement of LCD panels for new due to unprofitability of such repairs, but may have a stock of components, including panels used (used). Call nearby TV repair shops in the hope to find a working used matrix for the specific TV model is in any case not superfluous, before you simply throw the TV away.
Many people often have a question. Why can’t you fix it?? The glass itself is intact and there are no visible cracks, just streaks and interference. The fact that often damaged the inner glass, and with it the LCD crystals and the connections between them. In any case it is impossible to restore the internal structure of the matrix in this case, even with the most advanced repair tools and you need to replace the panel.
Repair of LCD panels is not originally intended by manufacturers. There are no instructions, diagrams or spare parts to repair them. The experience of our craftsmen and the availability of spare parts from used TV sets sometimes help to somehow fix the situation. All initiatives to restore performance of LCD panels come directly from repairers. In some cases, workshops can be offered to replace the glass from another panel, structurally similar to yours, or other options out of this impasse, for example, to buy back unrepaired TV for parts at a comparable price.
In conclusion we would like to note that some TV models have an additional protective glass, which can be cracked by shocks, but the display glass and crystals remain unscathed. In such cases, the broken glass can be replaced, or simply removed so that it does not interfere with viewing. But such TV sets (with protective glass) are on sale very rarely. In addition, few buyers know about their existence and puzzled in advance about the additional strength of the screen. Usually when choosing a TV set we are guided by other criteria.
Causes of vertical stripes on the TV screen
Usually it is caused by loss of reliable contact of LCD-matrix with the board which is responsible for forming the image on the screen. In this case the contact can disappear due to mechanical damage to the flat cable or oxidation of its contacts. SMD components mounted on the flat cable may also get oxidized.
Mechanical damage of the flat cable is a typical problem for laptops, because the folding form-factor of the device contributes to it. Also a bad contact in the connectors of the flat cable can contribute to the appearance of a vertical stripe on the screen. The last reason is the most easily correctable, and you can cope with it yourself.
The difficulty is that often this stripe on the screen appears spontaneously, and then, after the TV enough warms up, disappears, and the screen shows as if nothing had happened. Sometimes the band does not go away, but looks a little lighter than the rest of the image.
Masters often determine the fault of the plume by pressing on its problem areas. In this case, the stripe from the screen may immediately disappear. If oxidation of damaged lines is the culprit of the problem, you should press with even more force.
Troubleshooting a flat cable at home is not easy. To do this you will need a device for precise positioning and fixing of the plume, magnifying devices, special tools and conductive anisotropic film for eliminating the breaks (it has reliably insulated contact tracks applied in advance). In the service centers for such work are used special expensive devices. machines.
If the SMD resistors are oxidized, you should take a magnifying glass and carefully examine the soldering points to detect damage. It won’t hurt to check the resistance of the resistors themselves.
When you need to call the service center?
Very often when there is a problem with your TV, it makes sense to call the service center. The following is a list of problems that you can not solve by yourself and therefore you will need to engage professionals.
The HDMI input does not work. Such a malfunction occurs when devices are connected to this input while the TV set is working. This is a user error. You must do this when the device is turned off.
No picture. Before you call a master, you need to check the settings of the equipment, as well as whether there is a TV signal. If this does not help, then invite a specialist.
There is interference on the screen. First of all check whether there is a TV signal. Inspect the antenna cable and all connections. If that doesn’t help, contact your service provider. Probably some preventive maintenance is being done. Next you need to check the electrical appliances in the house. They might be causing interference when turned on. Interference on the screen can also cause internal faults in the TV receiver nodes. You can get rid of them if you call a master.
Can’t tune or save channels. It means that the memory chips are faulty.
There are stripes on the screen. There are various reasons for this. E.g. problems with matrix and motherboard or bad connection of cables at the joints.
No sound. It is possible that the speaker is broken, the system board is faulty or the connection of the stub is broken. However, do not hurry to make assumptions. The first thing to check if you accidentally pressed the button on the remote control which mutes the sound. There is a crossed out speaker image on this button.
The device does not turn on. When the socket, plug and power cord are intact, the power supply is not cut, unplug your TV and call a master. If you do not do this, it is likely that the main components of the TV will fail. And that means that you will have a more complicated repair.
