Instructions on how to repair and replace the TV screen with your own hands
Mechanical damage or failure of internal components of the TV requires repair of the screen. The ability to restore display functionality and appearance depends on the condition of the device and the characteristics of the specific malfunction.
Can it be fixed
LCD televisions are widespread and are installed in many apartments. The popularity of the devices is due to the high-quality images that are suitable for viewing modern content. Asking the question of whether it is possible to repair the LCD panel, you need to carry out a diagnosis and understand the nuances of the TV.
The main component of the screen is a matrix containing a large number of particles filled with a mixture of xenon and neon. Semiconductors are placed along the perimeter of the matrix. During operation of the device, electricity passes through the gaseous medium and forms ultraviolet light, illuminating the phosphors. Through this process, individual cells are highlighted in different colors.
All display components are located in a compact space between the planes, which are made from a special type of glass.
When diagnosing a TV screen, you need to determine the type of failure. The most common failures are:
- the formation of strong defects caused by external mechanical stresses;
- violation of the transmitted image due to the ingress of liquid;
- scratches and micro cracks on the display surface.
If the screen is badly damaged and the integrity of the matrix is violated, the gas mixture will begin to leak out and it will be impossible to repair the device. The only way out in this situation is to buy and replace the matrix. Since the cost of a new matrix is high and comparable to the prices of TVs, it is worth immediately considering the possibility of buying a new device.
Small scratches that do not affect the state of the matrix can be removed by yourself. To do this, wipe the surface with a weak solution of ethyl alcohol or a special agent intended for liquid crystal monitors.
How to choose a new screen
When an LCD television screen needs to be replaced, a new component is selected based on several criteria. In particular, it is important to consider:
- Screen size. Before replacing the die, measure the length and width of the part to be replaced. Otherwise, installation will not be possible.
- The quality of the transmitted image. Manufacturers offer a large number of matrices that differ in the number of phosphors. The image quality increases with the maximum resolution of the screen.
- Price. As a rule, new television screens are sold at inflated prices, so it is not always advisable to repair them.
How to replace correctly
The matrix replacement procedure depends on the specific TV model. Differences in the procedure for dismantling and installing a new element are associated with the uneven design of devices.Screws or latches are used as fastening elements. Dismantling the TV is carried out from the front or rear.
With front access, the latches that hold the TV panel liner are extracted. After unfastening the latches, access to the matrix is opened, which is screwed to the case. For disassembly, remove the fixings from the rear wall, then install a new component and reassemble in the reverse order.
For rear access, unscrew all the latches on the back of the TV and remove the stand.
Since screws of different lengths are used on the case, it is worth remembering their location. After dismantling the case, it remains to remove the dies and install a new screen.
The matrix installation procedure itself is not particularly difficult, but it is important to follow the sequence of actions. Specifically, the following steps should be followed:
- After dismantling the box, a matrix is visible on which the electronic cards and cables are fixed. Components are turned off after taking a photo of their location.
- Disconnect the cables along the perimeter of the TV. In some types of devices, the cables are hidden under the chassis.
- After removing the matrix, it is placed next to the repairable one and the modules and electronic boards are transferred one by one. Immediately after transferring the board, a corresponding loop is connected to it.
- When a set of modules is connected, the case is assembled and the functionality of the screen is checked.
For the device to work properly, it may be necessary to match the new matrix with the modules. To do this, you need to turn on the TV, go to the settings and launch the corresponding function.The detailed process is described in the instructions attached to the technique and may vary slightly.
When to contact a specialist
In some cases, it is not possible to independently repair or replace components of the TV. The best solution to the problem in such situations is to seek professional help from official service centers and private workshops. It is recommended to seek the services of specialists if:
- the screen is severely damaged and the internal components of the device are affected;
- there is no practical experience of the repair and confidence in the correct implementation of the repair;
- replacement requires rare parts that cannot be found alone in electronics stores;
- A repair attempt was made, but the display could not be restored.
Repairing a TV in service centers will cost more than repairing it yourself, but contacting a specialist has several advantages.
The main advantage is the high probability of successful repairs and comprehensive preliminary diagnostics using specialized equipment. Another advantage of professional repair is the quick selection of the necessary components and prompt repair with a quality guarantee.
What determines the cost
Repair costs vary widely. The exact cost of refurbishing a TV depends on its condition, the type of failure and the cost of the individual components to be replaced. The most economical way to repair a TV is to carry out work independently without the involvement of specialists, but in this situation there is a risk of making a mistake and causing new breakdowns.
Expert tips and tricks
Before you start repairing your TV, you should familiarize yourself with the recommendations of specialists, since in some situations a malfunction is not associated with serious breakdowns. If the device is not visually damaged and does not display an image, the problem may be one of the following:
- Lack of electricity at the outlet. The likely reason is machines turned off in the meter or a planned shutdown.
- Dead batteries in the remote control. The TV may be in perfect working order, but will not turn on due to dead batteries. It is worth trying to turn on the TV via the button on the panel to check this option.
- Tripping of the protection relay. The component turns on when the voltage changes suddenly. A characteristic feature is the appearance of a black image for a few seconds, after which everything is normalized.
- Burnout backlight. If the TV does not transmit a picture, but a sound is heard, it means that the inverter or the bulbs of the backlight have burned out. The problem is solved by replacing the components.
- No signal. Malfunctions of an antenna or digital decoder often lead to no picture on the TV screen.
Rules of operation
To reduce the likelihood of malfunctions, you must use the equipment correctly. It is important to avoid mechanical stress and contact of the screen with liquid. It is best to wipe the screen with a soft, slightly damp cloth using special products.
If the TV is broken, be careful not to damage the internal components. Otherwise, the cost of repairs can increase significantly.After damaging the TV, you need to remove parts of the screen and carry out diagnostics.