Often users are faced with such a nuisance as the appearance of vertical stripes on the TV screen. This defect is caused by a malfunction of either the matrix or the loop or other circuit elements. If you encounter these kinds of problems, the user should not worry, because most of the problems of this kind are not critical and can be fixed.
Possible causes of malfunctions
The resulting vertical bar does not necessarily indicate important technical problems. It is quite possible the reason is solved much easier than it might seem at first glance. The most basic causes of failure are as follows:
- The problem is in adjusting the image. This is fixed using automatic tuning.
- The problem is in the cable connectors. If the operation is long enough, the cable entry may be dirty or one of the contacts may be damaged. This problem is solved either by cleaning or soldering the contacts.
- Violation of cable integrity. The problem occurs with frequent kinks of the cable or its break. The trouble is easily solved by replacing the cable. If there is no possibility of replacement, then, as in the previous case, a soldering iron can come to the aid of the user.
If a band appears and then disappears on a plasma TV, and is also accompanied by distortion of the image or color scheme, the malfunction is much more complex. It will be harder to remove. Here are the most common causes of problems of this nature.
- Breakage or violation of the integrity of the loop connection matrix.
- Violations in the matrix itself
- Failure in one or more circuit elements.
With due desire, absolutely any malfunction can be eliminated. However, on modern TV models, the purchase of new components can compare with the cost of a new device. That is why repair is not always advisable, especially if the TV has served for a long time. Since replacement of parts does not guarantee high-quality performance, and a long period of operation can lead to new breakdowns, in case of problems, you should think about purchasing a new model.
If the bands appeared suddenly, and the TV was not subjected to mechanical stress, you can use the warranty service. If the warranty has not yet expired, this will be the best way out of this situation.
In a situation where the warranty period has ended, and the purchase of new equipment is impossible, there are some tips on how to try to fix the problems yourself.
Important! Remember that during the warranty period you should not give the equipment for repair to private individuals, as well as try to disassemble the device yourself. This can lead to the fact that the warranty service will cease and the service will be denied to the user in repair.
Loop replacement
The most common cause of stripes on the screen is damage to the cable.
Attention! Do not start repairing complex equipment, in the absence of tools, knowledge and skills in this area.
Professionals use special machines to restore the loops, the acquisition of which is impractical for fixing one breakdown. That is why the best way out of the situation is to replace the loop.
First you need to order a new part, specifying before this the model and year of manufacture of the TV. To change the loop, the user will need screwdrivers or bits, depending on the TV model. To get to the problem element, you should carefully disassemble the case.
Important! In some TV models, the wires can be fixed on the panel, so you should carefully unscrew and disassemble the device casing so as not to break off accidental contact.
In modern TVs, wires are attached to special connectors. Therefore, they do not need to be soldered when replacing a part. When a loop is detected, it should be carefully disconnected without pressing on the board itself, since it can easily be broken.
After the old cable is disconnected in its place, it is worth connecting a new one. This should also be done carefully, since it is very easy to damage the contacts, which will lead to a more complex and expensive repair. Also, a new part should be shaped similar to the old one so that it does not interfere during assembly. Assemble the device in reverse order.
Important! When attaching a loop, in no case should it be bent or twisted. This may damage the contacts inside and the part will be completely unusable.
Matrix replacement
The problems with the matrix may be indicated by a strip of the same color, which appears and disappears at different intervals. If such a problem is observed often enough, you should be puzzled by the issue of repair. In the case when the strip is black and increases in size over time, this indicates a problem with the decoder, which is located directly in the matrix itself.
The matrix is the most expensive part on the TV, so the best solution to the problem is to contact a specialized service if the warranty period has not expired. Otherwise, you should contact the specialists of other services. But the user should be prepared for a very high price tag, which the master can set for the replacement of the part.
If the user decided to replace the matrix on his own, he should remember several important rules.
- Most of the pins on the board are very thin and extremely sensitive to damage. Therefore, parts must be replaced very carefully.
- For deeper repairs, such as soldering parts, you must have special equipment, such as a magnifying glass or infrared soldering iron.
- In the absence of knowledge and skills, it is not practical to repair such a complex technique, this can lead to even greater breakdowns.
Bad contact
The most obvious and simplest problem is a broken contact in the connector itself. This problem is solved with one click on the connection. If the contacts on the connector have oxidized, increase the pressing force. This is the simplest problem and it is easily solved. However, if after the described actions the stripes on the screen did not disappear, the problem may be in the loop itself. In this case, more effort will be required to restore it.
Vertical stripes are a fairly common problem that requires an individual approach. Devices such as LCD TVs or computer monitors are very complex equipment that not everyone can repair. Some problems can be solved without special knowledge or skills, however, many of the above problems cannot be dealt with on their own.
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