Stripes appear on the lcd tv screen
Horizontal bar on TV screen
Horizontal bar on TV screen
This type of TV malfunction is perhaps in third place after the line and power supply failures. A narrow horizontal white stripe on the TV screen indicates a malfunction of the vertical scan.
A malfunction such as a horizontal stripe on the TV screen can occur for several reasons:
- Faulty personnel microcircuit;
- The capacitors of the strapping of the personnel microcircuit are faulty;
- There is no power supply for the personnel microcircuit;
- Ring cracks in the frame scan elements (CR).
It can manifest itself in different ways. it is a bright narrow horizontal strip on the screen or a strip 3-4 cm wide.It depends on which element and which cascade is faulty.
Perhaps you need to start with the SIMplest, check the microcircuit and its strapping for the presence of ring cracks in the soldering. For some, they appear even after a year of operation (for example, for Erisson), for others after many years, here it is enough to solder the leads to eliminate the malfunction.
Next, we check the presence of supply voltages. Depending on the microcircuit used, the voltage can be one or two, for example 9 volts and 45 volts. The low voltage feeds the preliminary stage of the microcircuit, and the high voltage feeds the output stage.
The power supply of the KR is mainly carried out from the TDKS, however, there are TVs in which voltages are supplied from the power supply.
Let’s look at the CD of the Rolsen 72FS10T-5 TV on the TDA8356 chip
The power supply of the KR is carried out with a voltage of 16 V (pin 3) and 45 V (pin 6) through break resistors R405. 1 Ohm and R416 22 Ohm. When these resistors break off, a horizontal strip will be observed on the TV screen. A break in these resistors may indicate a malfunction of the personnel microcircuit or some kind of load in the KR. If the resistors are intact, then the microcircuit is most likely alive and it is necessary to change the electrolytes in its strapping.
As I wrote above, a horizontal stripe on the TV screen may appear with faulty capacitors in the strapping of the personnel microcircuit. Here, the very first thing you should pay attention to is whether there are swollen capacitors on the power supply of the microcircuit and in the output stage (usually these are large capacitors 1000-2000 uF). For example, let’s look at the Rolsen C2135 TV set:
Here we change the main ones: C406. for power supply, C405. voltage boost, C406. The best thing is to check the parts by replacing, but in some cases you can “throw in” an additional capacitance, that is, solder the capacitor and see the result.
When analyzing the performance of the microcircuit, see if there is any damage on the case, and if it is getting hot. You can also check it in this way, evaporate the microcircuit and check the resistance of the power leads (in this case, 3 and 6) to the negative terminal (case), there should not be a short circuit and too little resistance.
Of course, a malfunction with a horizontal stripe on the TV screen can also occur with the release of other elements, for example, the breakage of frame coils, but they are quite rare and I have never come across.
Reasons for malfunction
Of course, it cannot be said that all TV malfunctions are related only to the problems described above. Since very often the cause of any breakdown can be, among other things, the user himself due to careless handling of the equipment.
Some of the most common malfunctions include:
- incorrect settings of the image itself (you can get rid of this if you return the parameters that were set with the original values);
- poorly connected cables, possibly clogged with dust.
These kinds of problems can always be solved easily, and often by yourself. You can wipe the cable, wipe off dust and make the necessary changes in the settings.
The reasons for the stripes on the TV screen of Philips, Samsung, Sony, LG are often the hardware faults themselves. They can disappear and then come back again. In addition, it can cause geometric distortions in the picture, image flickering, frame sticking or other interference.
Sometimes a malfunction can be triggered by a damaged matrix on LED TVs, or due to burnout of elements on microcircuits.
It is often very important to determine the exact cause of the breakdown. Since if the device is still under warranty, then it can be returned if the malfunction appeared through no fault of the user.
And if some small defect appears, you shouldn’t try to fix it on your own, so as not to lose the warranty on the equipment, if, of course, it is still valid.
The appearance of a bright strip on the screen indicates a malfunction in the frame scanning system. In order to diagnose this kind of problem, you need to have special equipment.
Possible types of stripes
The stripes on the screen can be of different types: both vertical and horizontal, and they can also differ in color. In both situations, this is, of course, an unpleasant fact, which may indicate that something is wrong with the monitor. Even if the stripes appear only occasionally, it does not allow the normal use of TV. And it may also indicate a malfunction of the matrix, loop or circuit elements.
Depending on the type of streaks that appear on the TV screen, you can determine the nature of the defect.
Any technique can fail from time to time. This only indicates that you should not panic in such cases, but you need to try to calmly figure it out.
|Possible types of breakdowns||What is the problem||What to do about it|
|1||Narrow vertical bar on screen||Indicates a malfunction of the matrix. The cause of such a breakdown may be a power surge. It is quite possible that in a few days everything will fall into place, the defect will disappear by itself.||Unplug the TV and then plug it back on.|
|2||Multi-colored vertical lines||Mechanical damage to the matrix or its components.||Need repair service.|
|3||Multi-colored stripes all over the screen||The contact cable of the matrix can be damaged or disconnected.||It is not worth delaying the repair, so that in the end its cost does not increase more. In addition, if only part of the matrix is damaged, the repair will be partial, and in case of severe damage, a complete replacement is required.|
|4||Horizontal white stripe||The frame scan is malfunctioning, it may be due to a short circuit associated with voltage drops. Chip cracks.||Repair depends on the extent of damage.|
|five||Black stripe, both horizontally and vertically||The decoder is malfunctioning. One of the most difficult and expensive breakdowns.||A complete replacement of the matrix is needed. When tightening with repair, the stripes will increase.|
|6||Ripples, image distortion, streaks, horizontal stripes||Problems with the contact loop of the matrix.||Need to solder the contacts or replace the loop itself.|
|7||Multi-colored stripes (blue, purple)||Due to a problem with the display controller. This could be due to a defective microprocessor chip or printed circuit board. As well as various shocks or vibrations.||It may require both a complete replacement of the controller and SIMple heating with an air soldering station.|
Recommendations for elimination of breakage
Of course, streaking on the screen is a bad sign, but don’t panic right away. Before proceeding with any checks or disassembly of the TV, you need to pay attention to the cable connection and its cleanliness.
Sometimes users can associate the appearance of white or colored stripes with a bad signal from the operator himself, but this is not always the case.
But in this case, it is definitely worth checking how the antenna is connected and how dirty it is. Perhaps a SIMple cleaning will be enough in this situation.
You can also check the connector itself, since contact problems can also occur. To do this, you can turn on the USB flash drive in the TV, or SIMply connect the screen to your PC using another wire. And if in this case everything will work properly, then you should do a SIMple cleaning or replacement of the connector.
How to fix a TV if horizontal or vertical stripes appear on the screen
When a user sees stripes on his TV screen, most often he begins to panic immediately. But there are different ways to solve such problems as well. The first thing to do is to determine what this or that streak indicates. And what repairs might be needed.
What to do first
Of course, most men, before contacting the service, will most likely try to fix the problem on their own. Since stripes on the screen seem to be not such a difficult problem, but this is only at first glance.
To start self-diagnosis, first of all, you need to remove the back panel, which is usually held with self-tapping screws, they must be unscrewed all. If the back cover is removed for the first time, then the mounts themselves will be hidden by a black compound, which is the same color as the plastic of the panel itself.
Further, you need to feel that all fasteners are disconnected, and only then remove the cover. Be careful not to break it in case you missed some self-tapping screw. Different models may have different mounts, so be careful. Sometimes even wires can be attached to the panel itself.
When doing this, use a flashlight and check before removing the cover completely.
Here, finally, the long-awaited panel is in front of us, we will consider what to do with it next.
It is better to follow this sequence of actions:
- Check all large chips on the motherboard. You should inspect carefully for various cracks, changes in color.
- Next, you need to examine the microcircuits, contact points. To inspect them from both sides, the boards themselves can be removed from the latches. All adhesions must be complete, without damage, cracks, etc.
- Check the coil of the power supply board. You need to inspect it for dirt.
- Next, you need to inspect the loops. Here it is important to check them for kinks, damage to the conductors, etc. In addition, you need to carefully examine the inputs of the loops themselves into the connectors for traces of dirt and oxidation.
After that, you need to conduct a careful inspection and make sure that there is no overheating anywhere. This can also be noticeable by the fact that the case changes color (turns yellow) under the influence of temperature.
In addition, during the check, you need to pay attention to the varnish surface of the boards and its integrity. And at the end of the inspection, it is worth paying attention to the capacitors themselves. These are barrels that are electrolytic cells and can be of different sizes. If there is something wrong with these details, they become very convex. And the crosses on the foil that are on top of these barrels become very noticeable.
There is no need to panic because of one vertical line on the screen, since all the parts needed for repair can be easily purchased via the Internet and the breakdown fixed. But if you are the owner of an LCD TV or Smart TV, then the repair will be more expensive.
Also removing dust or any other contamination can sometimes completely repair minor damage to the screen.
Damage to the matrix and its components
Probably in the list of the most difficult breakdowns in various TVs, such as LG, Samsung, Philips, as well as in other less popular models, is the replacement of the matrix or ribbon cable. Sometimes such repairs can cost the user more than half the cost of the LCD screen itself.
A matrix ribbon cable is a single hardware connection block that is installed using fasteners. An important difference is that the screws or screws from it should be unscrewed in the opposite direction to the one we are used to (counterclockwise).
There are models where the fixing of the connecting cable and associated wiring goes on the cover itself. Then, when disassembling, you need to disconnect them carefully and carefully so as not to damage.
Sometimes stripes on the screen can pass as unexpectedly as they appeared. But, unfortunately, this is not always the case. So in such a situation, you need to contact the service. Since not everyone is able to replace or repair the matrix. Often, users can even refuse to repair in case of breakdowns of this kind. Especially if this procedure costs about 70-80% of the cost of a new TV. And few people want to spend a SIMilar amount on the repair of a not entirely new TV. Better to buy a more modern model with a guarantee.
Sometimes, due to the breakdown of the matrix decoder, stripes also appear on the screen. In such a situation, you should immediately contact the service center to fix the LCD screen, which will be much cheaper than if you wait some more time.
If the TV is still under warranty, then you shouldn’t even try to fix it yourself, because by contacting a representative center, you can get quality service and the necessary repairs for free. And in the worst case, even the replacement of TV with a new SIMilar model. If the warranty is no longer valid, then you can either deal with the breakdown yourself, or contact a specialist.
Have you had any problems with your TV? What exactly was it and with which TV model? Write your story in the comments.
Possible causes of image integrity violation
First of all, carefully check all connectors. Avoid the possibility of a loose peripheral cable or clogged video output. After that, enter the TV menu and select automatic settings. If stripes reappear on your LCD TV screen, then the problem lies within.
You can observe both vertical and horizontal stripes, which have the same nature of occurrence and are eliminated using the same techniques. It is important to remember that no TV is immune from such problems. Even the top LCD TVs from Samsung, Sony, LG, Philips are just household appliances that are subject to both external and internal influences.
|External manifestations||Probable malfunction|
|Thin vertical line||Matrix error|
|One or more colored vertical lines||Matrix defect|
|Multicolored horizontal stripes, stains||Disconnecting the contact loop from the matrix|
|White horizontal line||Frame alignment defect|
|Black vertical or horizontal stripes||Decoder failure|
A narrow vertical line indicates an occasional single die error that could have been caused by an unexpected voltage drop. In this case, it is worth waiting for a while, the strip may disappear by itself.
One or more vertical stripes of a certain color is an indicator of matrix breakage. It is undesirable to waste time, because their number can increase and occupy the entire screen. In case of minor damage, repair is possible, in case of an extensive defect, a complete replacement of the matrix may be required.
Horizontal stripes of different colors, streaks, ripples and screen distortion are the result of the connection of the contact cable to the matrix being weakened or missing. To eliminate the malfunction, SIMply re-solder the contacts.
A thin white horizontal line indicates a frame defect. It can appear due to constant voltage surges, short circuits or a lightning discharge, after which the contacts melt, and cracks appear on the microcircuit. The necessary measures depend on the degree of damage.
Vertical or horizontal black stripes without a single pixel require the most expensive repairs. Usually they mean a breakdown of the decoder, so you have to change the entire matrix completely. Otherwise, these lines will get wider and wider until they finally fill the entire screen.
How to fix the problem with stripes on the TV screen
Stripes on the screen are a symptom of a malfunctioning TV or problems with the incoming signal. According to them, an experienced telemaster can identify and eliminate the breakdown. The stripes on the screen prevent the user from comfortably watching movies and TV shows.
The most common causes of streaking are:
- Problems with the signal source from the repeater or antenna. In the second case, powerful devices next to your antenna, its incorrect installation or configuration are to blame.
- Problems with cables. This is especially true for cable television. A weak analogue antenna signal will “make noise” rather than give bands.
- Breakdown of the TV. This can be a loose plume, a burnt out or mechanically damaged matrix, etc.
You can try to fix the first two problems yourself, and it is better to entrust the repair of the device to professionals.
Preventing the appearance of stripes on the screen
Do not worry if streaking occurs on the LCD TV screen. Almost all breakdowns are subject to repair. Fortunately, today the official services of large TV manufacturers. Samsung, Phillips, Sony, PanSonyk, LG. are available in almost all cities of Russia. over, if your device is still under warranty, the repair procedure will cost you completely free. Read also how to independently remove scratches from the screen and check TV for dead pixels.
Stripes on TV
A well-made TV set can serve for many years without breakdown and bring a lot of positive emotions to the owner. It doesn’t matter what you like to watch: football matches, races or melodramas. All of this looks more colorful on a large TV screen than on a computer monitor. But in any case, there comes a moment when the TV matrix is completely out of order or certain defects appear.
The most common defects include both broken pixels and stripes on the TV, and there are many options for the appearance of stripes. There are several reasons why such problems arise, do not panic once about irrevocable breakdown. In this article, we will consider all the reasons for the appearance of a strip on the TV screen.
Types of stripes on TV and the possible reason for their appearance
Before drawing any conclusions, make sure that the stripes on the TVs are in no way connected with the poor quality of the connection of the peripheral cables. The reason for the appearance of picture defects can be a loosely connected cable transmitting an image, as well as a clogged or clogged video connector. Check your TV’s picture settings, select auto adjust and see if the streaks are gone. If not, then we understand the ill-fated stripes.
In any case, the appearance of stripes negatively affects the quality of the displayed image, and sometimes makes it SIMply impossible to view. However, there is a difference between a defect and a defect, and there are several types of stripes. Vertical stripes on a TV are narrow (only 1−2 pixels wide), and there are wide (cover from five to one hundred percent of the screen). A narrow vertical strip of pixels glowing in a certain color with a probability of 100% appears as a result of problems with the matrix. Such a defect can be eliminated by itself, if within a few days this did not happen, you need to carry the TV to a service center.
If a thin vertical (horizontal) strip of pixels that do not burn at all appears on your TV screen, then this most likely indicates a breakdown of the column (row) decoder on the matrix. Such a breakdown often occurs with a power surge or thunderstorm and requires immediate treatment. Since over time the band will only expand and soon it will be impossible to watch TV. The problem is that if the decoder breaks down, you will most likely have to buy a new matrix, which is quite expensive. The decoder is most often located either directly on the matrix, or on a loop in front of the matrix. In the latter case, some warm up the place where the cable is glued to the matrix. This does not always help, and if the problem is solved, it will not be for long.
A large number of vertical stripes covering the surface of the screen may appear as a result of a malfunction of the matrix or if the T-KON board breaks down. Only an employee of the service center can say for sure. Horizontal stripes appear on TV for the same reasons as vertical stripes and are eliminated by SIMilar methods. It should be understood that not in all cases, if there are stripes on the TV screen, an expensive matrix replacement will be required. In most cases, with the timely detection of a defect, you can get by with an inexpensive surgical intervention of the master. Replacing the T-KON board, loose fit of the matrix loop. this is the list of services that will be provided to you in the service center of your city.
If streaks appear on the TV, then this is undoubtedly an unpleasant problem. However, don’t panic. In most cases, they are SIMply removed by the wizard. If the warranty period has not expired, you will avoid any costs at all. The only thing you don’t need to do is disassemble the TV and try to figure out the defects of the matrix yourself and try to perform certain manipulations using the downloaded schemes (soldering, physical impact on the matrix elements). The likelihood that you will solve the problem is small, but you can easily ditch the matrix completely.
Stripes on the TV screen: causes and elimination of breakdowns
The appearance of stripes on the TV screen is one of the most common defects, while stripes can have very different directions (horizontal and vertical), as well as differ in color (most often black and white, blue, red, gray, almost transparent or multi-colored). In any case, their appearance directly indicates a hardware malfunction of the TV receiver, this may be the result of mechanical shock, short circuit or system failure.
In our review, we will dwell in more detail on finding out the causes of such breakdowns and give recommendations on what to do to the owner of the equipment if he is faced with such an unpleasant situation.
In fairness, we note that the appearance of stripes does not always indicate a serious malfunction and does not mean that the TV must be carried to a professional craftsman as soon as possible. Sometimes they arise due to the user’s negligence, this may be due to dust getting into the device or incorrectly set image settings. Both problems can be solved independently.
To do this, go through the menu to the TV settings. Then select the “Support” option. In it, click on the “Self-diagnosis” block. Then it remains only to start testing the image.
If the reason why stripes appeared on the TV screen is of software origin, then the system should be flashed, for this a series of sequential manipulations are performed:
- connect the TV receiver via cable or via Wi-Fi to the Internet;
- in the opened settings, find the “Support” block;
- select “Software Update”.
After that, the system will automatically start checking for correct updates. It is imperative to wait until it finishes downloading, as a rule, the time directly depends on the speed of the Internet connection.
For problems with contact
As we mentioned earlier, vertical stripes on TV screens often appear due to poor contact quality. Basically, this happens if the TV is initially assembled incorrectly. In addition, it is possible that the owner of the equipment did not follow the rules for operating the equipment. even an incorrectly performed panel cleaning often leads to defects.
It is very easy to clarify whether it was contact problems that were the catalyst for the appearance of lines. A SIMple visual inspection is usually sufficient. Any irregularities in the connection points are visible to the naked eye: oxidized contacts look green.
If the wiring is oxidized, then you can clean them with a knife, blade or any other pointed improvised tool.
Replacing the loop
Another common reason for the appearance of stripes on the TV display is the breakdown of the matrix loop. Such a defect is very easy to identify, for this you need to slightly move the train or slightly press on it. If at the moment of contact the defects disappear, therefore, the cause of the malfunction is diagnosed correctly.
In order to correct the situation, you should take a magnifying glass, and then use it to find the area of damage to the loop wiring. Keep in mind that it will not be easy to do this. such a repair is a very painstaking and almost jewelry work. The restoration of the coating takes place by heating the contacts to a certain temperature or using a conductive varnish. It is best to entrust this work to professionals, because even the slightest overheating often leads to an aggravation of the problem.
The matrix cable (from the point of view of the TV design) is a hardware connection block. In order to remove it, you need to untwist the television panel and remove some of the parts. Almost all manufacturers install standard fasteners, for this reason, the bolts must be unscrewed strictly against the natural direction of movement of the clockwise. In some models, the connecting cable and associated wiring are fixed directly to the cover, in this situation, during the parsing of the TV, remove the parts very smoothly so as not to damage anything.
Possible reasons for the appearance
Horizontal and vertical stripes may appear on the TV receiver screen, sometimes various defects may indicate one breakdown. therefore, it is very important to understand as much as possible which bands may occur and which breakdown indicate.
There is no such technique that would be insured against failure of any system modules. Even TVs from internationally renowned manufacturers like LG, Samsung and Sony break down from time to time. The probable cause of a breakdown can be determined by the nature of the stripes.
A vertically positioned black bar often indicates a malfunction in the matrix. The reason for such an unpleasant phenomenon is most often a sudden power surge. However, there is no need to rush to the service center, and even more so to disassemble the TV yourself. It is likely that after a couple of days the malfunction will disappear by itself. you need to disconnect the device from the power supply, and after a while reconnect it.
The appearance of one or several dark or light lines appear. the reason for the failure of the matrix. In this case, it is not worth tightening with the repair, since after a short period of time the number of strips will only increase, and their width will increase. If the matrix is not completely broken, then a large-scale repair will still be required. the damage is usually eliminated by a complete replacement of the block.
If distortions appear on the device transmitting the image and horizontal colored LED strips appear, then this indicates the incorrect operation of the matrix contact loop.
A thin, snow-white horizontal stripe that runs at the top of the screen, in the middle or bottom, usually occurs due to problems with vertical scanning. The cause of such a malfunction is usually a short circuit associated with sudden voltage fluctuations. Due to too high a voltage, the contacts begin to melt, and the microcircuit becomes cracked.
The most difficult malfunction is represented by black stripes, regardless of whether they are located horizontally or vertically. Elimination of such a strip requires significant financial investments. Most often, such a defect indicates a malfunction of the decoder, therefore the masters are forced to change the entire matrix. If this is not done, then gradually the number of black bars will grow, and in addition, they will become wider, making it impossible to comfortably watch television programs and movies.
Stripes from top to bottom in combination with spots of various sizes often appear due to moisture getting inside the TV. in this case, the plasma matrix is destroyed.
Colored lines of a SIMilar direction appear due to corrosion processes that began in the matrix.
How to remove stripes?
The presence of any stripes on the screen interferes with the comfortable viewing of films and programs. Corrective actions directly depend on the origin of the problem. So, if the stripes appeared after the TV fell, or as a result of an impact, then in this case, damage to the LCD crystals and their joints, as well as the transparent inner glass, usually occurs. In this case, replacing the internal elements of the matrix will not work. the panel must be replaced completely.
There are other reasons too.
If the matrix and its components are damaged
Lines that appear unexpectedly also indicate this problem. Such a nuisance, as a rule, appears due to a short circuit or mechanical damage. It so happens that after a couple of days, the stripes pass by themselves, but if 5-7 days have passed, and the defects remain, then this indicates a serious problem with the technique. It is very difficult to replace the matrix on your own, therefore such repair work should be carried out exclusively in service workshops. However, the cost of such services usually reaches 70-80% of the price of a new TV. That is why, to begin with, be sure to find out how much the restoration will cost you, and only after that make a decision whether to agree to repair or refuse it. It is possible that service maintenance will be SIMply unprofitable for you.
If you notice thin lines of dark color on the screen of a television device, it means that the matrix decoder is out of order. Their width will only increase over time, so there is no need to delay the repair. it is better to immediately contact the craftsmen, and to do this the sooner the better.
In some cases, all conductors are compact and lightweight, so it is likely that during work you will damage one of the existing conductors by careless handling. For work, you will need not only professional skills, but also the appropriate tools: magnifying magnifiers, IR soldering station and some others.
Stripes and other defects on the screen surface can be the result of both minor and serious breakdowns, so users often face the question of whether it is worth doing repairs on their own. Yes, when it comes to stripping, for example, a cable from the current. But you do not need to replace any important system modules at home. the risk that you will permanently disable the equipment is very high.
As you know, any problem is easier to prevent than to fix it. In the case of the appearance of stripes on the TV, this rule works 100%, therefore, in the conclusion of our review, we will give several recommendations that will prevent the occurrence of such unpleasant defects on the display of your TV.
If moisture gets into the TV, then first of all it is necessary to disconnect it from the network to prevent a short circuit. All damaged elements must be allowed to dry thoroughly, usually it takes about three to four days, depending on the amount of liquid that has entered.
Do not move the TV often. this causes various damage to the cable or connectors, which, of course, will affect the quality of the image displayed on the screen. In addition, it is necessary that the unit is firmly fixed.
No dust or dirt should accumulate on the TV receiver. This causes overheating of the loop and, as a result, deformation of the contacts. In order to get rid of such deposits, it is advisable to use a special technical vacuum cleaner.
For information on what to do when streaking occurs on the TV screen, see the following video.
Stripes on TV: reasons for the appearance
The main factors that cause this malfunction:
- Breakage of the matrix.
- Temporary loss of loop contact.
- Lack of debugging of decoders.
- Problems / breakdowns of horizontal or vertical scanning.
Strip on TV: varieties
Horizontal stripes on the TV screen, vertical stripes, vague or clear, stripes diagonally crossing the plane of the monitor. each type indicates a certain breakdown. Most often, malfunctions occur suddenly and completely unpredictable.
- Vertical stripes on the TV screen indicate a defect in the matrix, which can sometimes disappear by themselves.
- Horizontal stripes on a TV from pixels are most likely to indicate a malfunction of the row / column decoder on the matrix and require immediate intervention by specialists.
- Wide vertical stripes on an LCD TV may indicate a malfunction of the T-Kon board or a loose matrix cable.
Stripes on the TV screen
One of the most common hobbies of people of any age is watching TV, which is present in every home and most often not in a single copy. Most have changed outdated CRT models and purchased new LSD or LCD counterparts. However, the new equipment, just like the old one, is not insured against breakdowns, and the repair of TVs may be necessary, regardless of the year of manufacture of the equipment. Some of the most popular brands that produce quality hardware are Samsung and LG. The popularity is due to the excellent value for money, the typical breakdowns encountered, which greatly SIMplifies the diagnosis and subsequent repair of Samsung or LG TVs.
Naturally, TV sets are characterized by a huge number of model ranges, however, for craftsmen who have been involved in the repair industry for several years, malfunctions are predictable and uncomplicated, and the availability of manufacturer’s technical support with the necessary modules, spare parts, software and documentation SIMplifies diagnosis and repair.
Quite often, our service center is contacted by customers with a breakdown of TVs, which is accompanied by image distortion, the appearance of a strip on the TV screen. Some of the breakdowns can be eliminated on their own, without replacing the matrix, and some require a complex repair process. Consider why these breakdowns occur.
Stripes appeared on the TV screen: how to make repairs?
The appearance of a strip on a plasma screen, the formation of a dark, black, white or horizontal strip on an LCD TV screen is professionally solved by recreating the LCD matrix loops, which involve the use of specialized modules. Naturally, making reliable home repairs is almost impossible. The procedure for removing streaks on a Samsung or LG TV requires precise, accurate positioning of the ribbon cable, the availability of tools, the use of anisotropic adhesive tape, etc.
If horizontal stripes appear on the TV screen, then it is extremely difficult to cope without a specialist, because modern electronic devices are extremely difficult to equip. Naturally, you can always try to fix the breakdown on your own, or you can entrust the repair to specialists of the appropriate qualification experience and level, because Romsat-Service guarantees high-quality and fast service.
If you could not find a solution to your problem. then contact our Service Center for help
Reasons for malfunction
Vertical and horizontal stripes on a TV screen are not always an indicator of serious technical malfunctions. Such defects can appear for easily explainable reasons:
- incorrect adjustment of the image so that the stripes disappear, it is enough to start the automatic selection of the optimal parameters;
- improper cable connection. Also, cables can be clogged, clogged with dust, they SIMply need to be cleaned.
Stripes on the Samsung TV screen may also appear intermittently. This defect is mainly accompanied by flickering of the picture, “sticking” of the frame or other distortions. All these nuances are of tremendous importance. Since they allow you to determine the nature of the breakdown.
Thin vertical line
Mechanical damage to the matrix
Vertical multicolored stripes
Malfunctions of matrix components
Colored horizontal lines, spots
Bad contact of the matrix loop
Horizontal stripe white
Vertical scan defect
Conventionally, all the reasons for the incorrect operation of the TV can be divided into several groups: mechanical damage, short circuits, incorrect settings. The last category does not need further study. Consider the subtleties of determining the failure of hardware components, as well as the features of their recovery.
It is easy to guess that the cause of this malfunction is the user, namely his violation of the operating conditions of the equipment. A single-color vertical stripe on the TV screen is a sign of matrix mechanical damage. This is a very narrow line, its width does not exceed two pixels.
In some situations, this defect appears, but later disappears. If more than 7 days have passed since the appearance of the band, then this is a sign of serious hardware damage to the TV.
Replacing the matrix is an extremely time consuming and costly process. Therefore, if the fears were confirmed, and the strip appeared on the Samsung TV due to damage to the matrix, it makes sense to think about purchasing new technology. If the warranty period has not expired, then contact the service center representatives.
You absolutely will not be able to replace the damaged matrix yourself. Since this requires special equipment. The use of improvised means will provoke an aggravation of the malfunction. It is more rational to contact the service center.
In addition to the breakdown of the matrix itself, there are also violations in the operation of its components. For example, the appearance of black lines on the screen is a sign of failure of the column decoder, which is located directly on the matrix. Over time, the line thickness will increase. Therefore, it is not worth delaying the repair.
If you want to repair the TV yourself, then you need to take into account several important points:
- Mostly all cables, loops and conductors are very thin. They can be easily damaged. Therefore, you need to be as careful as possible.
- To re-solder contacts, you need to have the appropriate equipment (infrared and hot air PS, magnifying devices) and professional skills.
- You need to know the location system of the base modules of the TV so as not to accidentally damage the operable components.
Why are there vertical stripes on my Samsung TV
During operation, the TV is exposed to mechanical damage. Because of this, there are malfunctions in the operation of hardware modules, which manifest themselves in the form of various defects. Vertical stripes on a Samsung TV screen may indicate the failure of several modules at once.
Now let’s take a closer look at how to quickly diagnose a TV breakdown. We will analyze troubleshooting methods, as well as compile a list of useful recommendations to prevent the appearance of all kinds of defects on the TV screen.
Ingress of moisture
Due to the ingress of moisture inside the LCD TV, oxidation of the contacts occurs. This breakdown can be determined by the characteristic green coating on the loops and contacts. If the scale of the malfunction is insignificant, then you can remove plaque from the surface of the conductor yourself. Cleaning with a knife or blade.
When, due to moisture, large stripes or spots appear at the bottom or in the middle of the screen, then the problem has reached a serious scale. The situation cannot be solved SIMply by removing plaque. First, you need to check the voltage of the contact circuit with a multimeter. In this case, contact the service center.
Moisture will break the LED backlight. Therefore, blackouts may appear in certain areas of the screen. It is possible that the problem arose due to improper care. Under no circumstances should you spray copious amounts of cleaning agents onto the screen surface. Special liquids need to be sprayed onto a microfiber or dry cloth, and only then wipe the display.
In some situations, stripes on the screen appear due to damage to the matrix loop. Broken conductors are not always amenable to restoration. Sometimes you have to replace them with new components. You can order a new cable at the service center, inform the managers of your TV model in advance.
It is better to entrust the elimination of hardware breakdowns to the masters, but if you want to do everything yourself, then you need to prepare the following tools: screwdrivers or bits PH, PZ, TORX, HEX, SL. The matrix connecting cable is located inside the TV, so work begins with removing the back cover. Unscrew all screws and gradually open access to the broken component.
All connections are fastened with special connectors. There is no need to solder the wires. It is enough to slightly press on the latch. The connection principle can be compared to an Ethernet cable.
The arrangement system of the base modules is different for all manufacturers. Therefore, you need to carefully study the detail of the assembly. You can find it on the Internet on the official website of the manufacturer.
Other mechanical damage
Black horizontal stripes on the TV screen may occur due to cable connection problems. To fix the problem, it is enough to disassemble the TV, and then connect the cables correctly. It is possible that some conductors are damaged as a result of mechanical damage. In this case, they need to be replaced.
A white narrow horizontal stripe on the TV screen may also appear due to broken matrix wires. It is extremely easy to determine this breakdown, push the loop a little or slide it to the side: if all defects disappear, then the malfunction is diagnosed correctly. Eliminating such a malfunction is an extremely difficult process. Use a magnifying glass or other magnifying tool to locate where the wires are broken. The restoration is carried out using conductive varnish or by heating the contacts to an appropriate temperature. If you overheat the contacts, the malfunction will be aggravated.
The equipment is not insured against damage and premature failure. TVs are also no exception to this rule. Mostly all disturbances in plasma operation can be eliminated. The main disadvantage is that the cost of some components is comparable to the price of a new TV. Therefore, it does not always make sense to change the matrix. It is possible that after a while other nodes will stop working.
What should I do if streaks appear on the display before the end of the warranty period? Much depends on the cause of the defect. For example, if mechanical damage to the screen became the catalyst of the problem due to the fact that the TV fell corny and hit a hard surface, then you should not count on free service. However, if defects have arisen due to incorrect factory assembly, then the manufacturer will compensate for the elimination of the faults. It is more expedient to refuse repairs. Insist on getting a new TV.
Don’t forget about prevention to prevent black and white and color stripes from appearing on your TV screen. Here are some helpful tips from the experts:
If you plan to hang the equipment on the wall, then you need to use a special bracket for this. Do not use homemade fixing systems. Follow the suggested tips, and then stripes or any other defects will absolutely not appear on the TV screen.
How to self-diagnose TV
First you need to disconnect the TV from the network and remove the back panel. This must be done extremely carefully, since loops and other components can be attached to it. Next, you need to conduct a visual inspection of the components.
- Inspect the main microcircuit for microcracks, pay attention to the places of its soldering with the rest of the TV elements.
- Inspect the loop, the contacts of the power supply, make sure that there are no mechanical damage and contamination.
- Examine the elements of microcircuits and contacts of the loop for oxidation. It is not difficult to detect this. oxidized elements have a specific greenish tint due to the formation of plaque.
- It will not be superfluous to check electrolyte capacitors. Their condition is very easy to determine. damaged elements are deformed and may look slightly swollen.
Reasons for the appearance of different types of stripes on the TV screen
Any owner of an LCD TV can face the problem of violation or incorrect transmission of the image on his device. Very often this manifests itself in the appearance of horizontal or vertical color stripes on the screen, which greatly complicates the viewing of programs and can lead to a complete failure of the television receiver. What to do if color stripes appear on the TV screen. consider in the article.
What problems lead to the appearance of stripes on the screen
Depending on which stripes are visible during TV broadcast, you can judge the causes of the malfunction. Stripes can be horizontal or vertical, different colors, different thicknesses, ripples, fps degradation and other problems. Some of these problems can be solved on your own, but sometimes only contacting the service department can help.
The main causes of malfunctioning TV screens are the following factors.
- Voltage surges that can lead to disruption of the functionality of the matrix and all components directly associated with it.
- Damage or oxidation of the matrix loop contacts.
- Malfunction or failure of capacitors.
- Loose cable connection.
- Dirty contacts of the power supply unit, ingress of a large amount of dust or foreign objects inside the TV case.
- TV settings failed.
About a third of all faults associated with picture defects on a plasma or LCD TV are accompanied by the appearance of horizontal stripes. For example, a white stripe on the screen may indicate a malfunction or partial failure of the microcircuit responsible for the operation of the frame scan. This problem is quite serious, requires diagnostics at a service center and, possibly, will result in the need to replace a part.
A wide blue bar (it can be purple or purple) may indicate a failure of the controller on the matrix. This problem also cannot be solved on its own, the best option is to contact a service center.
A narrow dark stripe (or many such stripes) are most likely indicative of problems with the matrix decoder. In this case, the intervention of a specialist is also indispensable.
A thin vertical stripe on the TV screen, again, speaks volumes about a failure in the matrix. If the reason for this is a power surge, then the malfunction may disappear on its own after two to three days. It is enough to turn off the TV from the socket and turn it back on.
A lot of colored stripes, accompanied by ripples, image distortion, indicates damage to the matrix contact loop. Alternatively, it may not be firmly attached.
What can you fix yourself
Some of the problems described above can be easily solved even by a non-specialist in the field of TV repair.
If vertical stripes appear, perhaps the reason is the most commonplace. hardware settings have gone astray. In this case, you need to return to the default (factory) image settings, using the functionality of the TV receiver itself.
If necessary, clean the connectors and TV housing from dust and dirt. Of course, you need to avoid mechanical stress on the TV, protect it from shock, drop and temperature extremes. It is also extremely important to ensure that moisture does not get inside, as this can become one of the reasons for the oxidation of the loop contacts or other elements. Therefore, it is recommended to wipe the screen and other elements of the TV with special means.
Oxidation can occur as a result of a factory defect, and due to violation of the rules for operating the device. If oxidation does occur, it must be removed. This can be done with a clerical knife or other thin and light blade. In this case, you need to act very carefully, avoiding strong pressure on the contacts.
What is being repaired in the workshop
In case of mechanical damage to the loop, it is more expedient to replace it. It is better to use original components that are suitable for a particular model. Its full name can usually be found on the rear panel. For example, for an LG TV, these are LVDS EAD cables with a specific numbering depending on the model. Unsoldering, most likely, will not be required, because the cable is connected to the matrix using special latches. Their connection works in the same way as for a LAN cable.
If replacing the cable may still be advisable, then in the case when it is necessary to change the matrix, it is better to refuse repair, since its cost is only slightly lower than the cost of a new TV. A full assessment of the replacement can only be done at a specialized service center.
It must be remembered that even ultra-modern and expensive TV models cannot be insured against damage to hardware modules. This is mainly due to careless handling or power surges in the network, but it happens that the culprit is the manufacturer, where negligence was allowed during assembly or low-quality components were used. Possible reasons for the appearance of colored or black stripes on the screen, as well as any other malfunctions, can be established in specialized service centers.
Therefore, if independent attempts at repair do not lead to the elimination of the malfunction, the service center will be able to repair the LCD TV only for a fee, which, depending on the breakdown, can be quite high. In some cases, it will be more appropriate to purchase a new TV model.