Repair Of The TV Screen (13 Photos): Replacing The Matrix Of A Broken LCD Screen With Your Own Hands. How To Remove The Ribbon Cable And Replace It Yourself? Repair Instructions

2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-18 12:09

A TV set undergoes various breakdowns during operation, and one of the most common is screen malfunction. The ability to restore the display to work depends on the type of TV and the type of malfunction. It is worth figuring out how to repair the screen with your own hands.

How to diagnose faults?

Before proceeding with the repair of the TV, you need to make sure that the problem really exists. Will help to identify the malfunction diagnostics , which you can do yourself and not spend money on calling the wizard.

There are several types of TV screen breakage. Among the most common are the following.

1. The technique stops turning on . This type of breakdown is associated with a blown fuse, so it makes no difference whether a CRT TV or a modern LCD device does not turn on. The only difference is in the structural elements that need to be changed. A fairly common reason for the failure of an element can also be a failure of a diode bridge.
2. Potential failure has occurred … A similar breakdown occurs in both domestic and foreign models. The reason lies in the incorrect operation of the posistor, which is responsible for supplying potential.
3. The plasma TV monitor stopped working . The problem should be looked for within the structure of the device, in the details and circuits that are responsible for transmitting the image to the display. It is easy to determine a breakdown: stripes of a dark or light shade appear on the screen, the color of the picture changes during viewing.

Another common reason for screen failure is a broken cord or a faulty outlet.

It is difficult to restore the TV display to work, but if you want and have the necessary tools, you can cope with the problem on one's own … In this case, it will be possible to correct not only the main symptoms, but also to improve the picture quality.

Signs of screen breakage and how to fix them

TV matrix differs in increased fragility, therefore, often during the operation of the screen, various malfunctions occur. LCD TV displays are particularly susceptible to this.

A breakdown of a structural element of the device can be detected by the following signs:

• the appearance of vertical or horizontal stripes on the screen;
• the appearance of large spots;
• the formation of small spots in the form of snow;
• the appearance of colored dots.

In addition, it will report the breakdown screen … If it shrinks or if it shows only half of the image, then there is a problem.

Another sign that the screen is broken is physical damage to the matrix , the display itself or other constituent elements. Deformation of the device occurs when:

• hitting the monitor;
• falling equipment;
• objects of varying severity hitting the monitor.

The malfunction can be identified by cracks that form on the glass, or small chips. The problem arises from improper transportation or operation of the device when kinks occur.

A common sign of breakage is distorted image … If the screen glows, blinks or even shows spots, then it needs to be replaced. Matrix repair is also required in cases when the screen becomes noticeable:

• pillars in the picture;
• fading or stuttering images;
• multicolored vertical stripes.

It should be noted right away that with a broken matrix or display backlighting, the image quality drops, and the picture is distorted.

A malfunction may not always lie in the device matrix. Sometimes the signs of breakdown are caused by the failure of the loop, designed to ensure the contacts of the main elements, or the decoder. Also, problems arise in the control chips.

If the screen breaks, the following types of stains may appear on the screen

1. Light in the form of rectangles or ovals. They can be stationary or constantly change their position on the screen. Such spots indicate breakage of the screen glass or deformation of the polarizing layers that need to be replaced.
2. Black in the form of separate fragments. Pixel breakage has occurred, and the best option would be to completely replace the screen.
3. Large dark areas all over the screen. In this case, the malfunction could arise due to the penetration of moisture into the device or a violation of the transportation of the equipment.

Spots can be located on edges of the screen or be located on the image itself.

You can cope with the problem on your own. Any breakage of the screen is nothing too serious and can be repaired. To do this, you need to run diagnostics device and assess its condition.

After it is recommended stock up on the necessary materials and tools , which include a new screen, individual spare parts, various screwdrivers and fasteners. Only after that, you can start repairing, unplugging the TV from the network in advance.

Do-it-yourself repairs should be done carefully . It is important to pay attention to the composition of the structure and how the elements are located in relation to each other. This will help you put the TV back together after the problem has been resolved.

TV screen replacement instructions

The procedure for replacing the TV screen depends on which one needs to be repaired. model … Differences can be in the order of disassembling the structure and the method of installing a new part - a matrix, accessories or a whole screen.

As fasteners, most models provide latches or screws , so it is not difficult to dismantle the TV cover. Disassembly of the structure is carried out from either side.

Frontal … In this case, it is necessary to squeeze out the latches, which are responsible for fastening the cladding of the television panel. This is the only way to gain access to the matrix and other screen components that may need to be replaced. To dismantle the matrix, it is necessary to unscrew the fastening screws - they are located on the rear wall of the structure. Then all that remains is to replace the element or part and reassemble the TV.

Dorsal … To access the matrix and accessories from this side, you need to unscrew the latches holding the back panel and remove the stand on which the TV is attached. Since screws of different lengths are used in the case of such devices, it is important to pay attention to their location and, if possible, mark the installation locations of certain fasteners. After that, it remains to disassemble the case, remove the failed matrix, install a new screen and reassemble the structure.

The procedure itself for replacing the screen matrix in the event of a breakdown is not difficult. It is important to follow the procedure and pay attention to the next steps.

1. When the case is disassembled, access to the matrix will appear. It will be possible to see that electronic boards and loops are fixed on it, which are responsible for sending a signal to the device's screen. These components must be disconnected and dismantled, having previously photographed or noted their location.
2. Loops should be disconnected along the perimeter of the device. It should be noted that in some models the cables are hidden under the frame, which must also be taken into account.
3. After removing the matrix, it must be placed next to a working element, to which modules and electronic boards should be gradually transferred. As soon as the board is transferred, a loop can be connected to the new matrix.

The new die is put in place of the broken one, then assemble the TV case and check the performance of the display.

If during the diagnostics it was found that the cause of the malfunction of the LCD screen or other type of display lies in the failure of other components, they must be replaced.

To do this, you will have to visit a specialized store and buy consumables, having previously specified the equipment model.

For the TV to work properly and last a long time, it is necessary to coordinate the new matrix with the installed modules . The procedure is carried out with the device turned on. For approval you will need:

• go to settings;
• run the corresponding function;
• follow the rules for connecting drivers.

It should be noted that depending on the TV model, the set and sequence of actions may be different therefore it is recommended to read the instruction manual.

It is not always possible to independently repair a broken matrix and ensure the operation of the device. If after carrying out repairs, matching the item and turning on the TV, stripes or spots were found on the screen, then the problem is serious.

In this case, it is recommended to contact for help from professionals.