Why did the bands appear on the TV screen

Vertical or horizontal stripes on the TV screen with an LCD display or computer monitor is a little pleasant defect that will not allow using the device. Even if they periodically disappear, it still indicates a malfunction of the matrix, loop or circuit elements.

Causes of failure

In fact, a similar defect on the LCD does not always indicate a serious technical problem. Of the simplest reasons, the appearance of a band on the screen can be identified:

• wrong image settings (just run the automatic setup);
• poor cable connections, they may be clogged or clogged with dust.

Due to complex breakdowns, vertical or horizontal stripes on the screen can appear constantly or periodically, often accompanied by flickering, “sticking” of the frame,rippling or geometric distortion of the picture. This fault may occur for several reasons:

• poor connection of the matrix plume (oxidation, breakdown);
• breakdown of the matrix itself;
• failure of the various elements of the scheme.

Microcracks in the loop

Any equipment is not insured against breakdowns, but in most cases they can be fixed. The disadvantage is that the cost of some spare parts is comparable to the purchase of a new panel - in this case it is better to refuse repair. First, replacement parts does not guarantee full serviceabilitysecondly, other nodes may fail over time, then the total cost of repair will exceed the purchase of a new TV.

If the TV panel is only purchased in a store and has not been used for more than 14 days, it should be exchanged.

It is not recommended to agree to repair, because there is no certainty that later the bands will not appear again on the screen of your TV. AT warranty period do not carry out repairs yourself, it is more practical to hand over the TV to the service center. Thus, the user will not lose the warranty, which the manufacturer assumes, and will not aggravate the breakdown to large scale.

Elimination of bad contact

Stripes on the LCD screen may appear due to bad contact connections. This kind of malfunction, as a rule - the result of poor-quality assembly or improper use of the TV. For example, getting moisture inside the case, which may be the result of an incorrect screen cleaningmechanical shocks. It is possible to establish this reason after a visual inspection of the connections with the naked eye or with the help of magnifying devices.

Contact oxidation on board

Contact oxidation it can be cleaned with a blade or a knife, it can be easily identified by a green patina, but if the problem is large-scale, then it is difficult to fix it yourself. After you need to check the voltage or call the contacts with a multimeter.

A bad contact can be caused by an incorrect connection of loops; for this, they can be disconnected and connected again.

Another reason for the appearance of different bands on the TV display - break wiring loop. It can be determined by lightly pressing or moving the loop: if the image is restored, then a breakdown is detected.Breaking down is a painstaking and delicate process. It is necessary to determine with a magnifying glass exactly where the wiring is broken. You can restore them using a conductive varnish or heating the contacts to a moderate temperature. Severe overheating will damage all contacts.

Restoration with conductive glue

Loop Replacement

In some cases it will be necessary change the whole loop of the matrix on new. First of all, you need to purchase a new part - it can be ordered at the repair shop, but before that find out the exact model of your TV, year of manufacture of the TV or monitor. You can change the faulty loop cable yourself or in the service. When repairing you will need some set of tools: screwdrivers or bits PH, PZ, TORX, HEX, SL.

The connection loop is inside the case, therefore, it must be carefully disassembled. It is necessary to disconnect the roof, carefully unscrew all the bolts and get to the part itself.

It is important to know! Bolts are always standard and unscrewed counterclockwise. In addition, many connecting cables and wires can be attached to the cover. When disassembling the TV, do not make sudden movements, in order to avoid breakage.

Most connections are fixed using special connectors, wires do not have to unsolder. It is enough to press the latch (the principle of connection is similar to the cables of the Internet or telephone).

The designs of televisions from different companies, such as Samsung (Samsung), Sony (Sony), Philips (Philips), may differ slightly, so you should use the instructions, or order assembly details on the company's official website.

Breakdown of the matrix or its parts

This fault is characterized by the presence of a vertical strip of one color with a width of one to two pixels. A defect occurs by itself and can also disappear within three to four days. If the problem lasts longer than a week, this is a clear sign of serious problems.

Replacing the matrix is ​​expensive and difficult, so if you have similar problems with the image, the output will be to contact the service center if the warranty period for the service is not over. When the LCD TV is used for a long time, the repair can be carried out by specialists of any workshop.

If thin horizontal or vertical stripes of a dark color appear (they do not glow), this most often indicates column decoder malfunctionswhich is located on the matrix itself. Later, the strip will only increase in size, so you should not delay the visit to the workshop.

When repairing or replacing parts, keep in mind the following.

1. Most conductors have a very small diameter, they are easy to reverse.
2. Skills and special equipment (for example, an infrared soldering iron, magnifying glasses) are needed to repair or solder contacts.
3. All operations are carried out with great care, incorrect movement can result from additional breakdowns.

Vertical stripes on the TV or monitor screen are caused by faults, both small and global. If there are stripes on the display, but there is no confidence in your abilities, you should not find out on your own why a strip could appear on the screen, it is better to contact qualified specialists. But if you have certain knowledge of electronics, then repair the TV do it yourself quite possible. This also applies to other breakdowns of the device. For example, you can quite independently fix the remote. But if your the TV stopped turning onthen this may be a sign of a serious malfunction, which can only be determined with the help of special equipment.

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