Faulty TVs

The development of technology on the spot is not worth it, and it's the best for TV technology. Modern TV sets differ from the first models strikingly. There is practically nothing in common between them. However, with the improvement of the quality of broadcasting, new problems arose associated with the breakdown of modern technology( screen matrix, microchips, etc.).This article is devoted to an overview of what are the most common TV faults, their causes and solutions.

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There are problems with turning on and off the TV

If the TV receiver does not turn on, the indicator for connecting the device to the network is not lit, then the power supply unit is likely to be out of order. It could burn out because of the "jumps" in the network voltage.

Important! If you accidentally turn off the TV, the problem is most likely the same.

If you have taken care of installing a relay that protects against a drop in voltage in the network, it can turn off the device at the right time. With stable voltage, the root causes can be as follows:

• The motherboard is damaged.
• The power supply unit is blown.

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The TV does not respond to the

control panel This is one of the most common TV faults. Most often, it's the fault of the console itself. Perhaps it was accidentally spilled on it or dropped inadvertently. Or maybe the batteries are out of order.

Important! If the remote is working, there may be a problem with the remote control receiver or problems with the processor.

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The memory of the TV device

does not work This breakdown makes itself felt when you configure channels and want to remember them. None of this venture goes. A similar situation with the sound settings. You set the desired settings, and after turning off the TV receiver they are not saved.

Most likely, the reason is that the memory chip has failed.

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The

buttons do not work If no response occurs when the button is pressed, check if there is a missing contact between the microcontroller and the button. If the contacts are not damaged, then the problem lies in the processor of the controller.

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There are problems with the

sound Most often, this TV breakdown is connected to the speakers. It is necessary to check that they are on, the speakers are connected, and the contacts are working. Sometimes the root cause is a breakdown of the sound processor or problems that occur with the low-frequency amplifier. Or maybe the problem lies in the problems of the radio channel.

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Poor picture quality or complete absence of it

The reasons for the TV failure in this case can be completely different. Some can be eliminated on their own, for the elimination of others will need the help of a specialist.

• If the image is missing and the sound is stored, the cause is in the malfunction of the video amplifier or the matrix.
• If there is no image, and the sound periodically disappears, then the question can be in the faulty state of the sweep.
• There is a sound and the screen is lit, but there is no picture. The cause of TV failure may be interference in the tuner or problems with the video processor.
• The image is only deployed on half the screen. The frame scan of the matrix failed. Most often, because of power surges in the network.
• The appearance on the screen of a vertical non-narrow band indicates problems with the horizontal line transformer. The horizontal bar on the screen indicates a malfunction of the vertical sweep.
• Single-color image( as an option - the disappearance of a color).This indicates a breakdown of the video amplifier or video processor.

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TV Matrix Malfunction The matrix, in essence, is the main part of the screen, because the image is aligned exactly on it.

Important! Most of the breakdowns of TVs associated with the matrix can only be solved by replacing it. The event is not cheap.

The main causes of damage to the matrix include:

• Fall, hit by a heavy object.
• Water entering the matrix contacts.
• Factory marriage.
• Wear and tear.

Important! If the matrix is ​​damaged, it is accompanied by the appearance on the screen of circles, colored bands. The image may fade or disappear completely. Identify the type of malfunction and replace the damaged matrix with a working one only by a qualified technician.

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Possible problems with the

frame scan The "Symptoms" that indicate the faults of televisions associated with vertical scanning are:

• Reducing or shifting the image vertically.
• Centering violation.
• The appearance of lines in the image - this indicates a reverse ray path.
• No vertical sweep.

If the frame scan is missing completely, a single horizontally located strip appears on the screen. The whole problem lies in the incorrect operation of the frame sweep generator.

Important! Eliminate all these failures under the power of only a person who is well versed in television technology. The most reasonable solution is to contact the service center.

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Can I troubleshoot the TV receiver myself?

Most of the problems with the TV are eliminated by the specialists of the service centers. Here's what you can do with your own hands:

• If the TV does not turn on - check for voltage on the network. Check the contact of the antenna connector, its connection.
• If the picture on the screen is of poor quality, it's worth trying to switch the receiver to other channels.
• If there is no sound, check the connection of headphones, make sure the sound settings are correct. Sometimes the headphones start working after they have been turned off and reconnected.
• Check the batteries in the control panel and replace them if necessary.
• Check the contacts in the console - if they are clogged, clean them.

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The most common breakdowns of TVs: plasma and LCD

These TV receivers differ from each other in the principles of operation, therefore some types of breakages are completely different.

For "plasma"

The plasma TV screen is a large number of capsules with an inert gas. The surface of the cassowals is covered with a layer of phosphor green, red or blue. When the electric current is applied to the cell, the capsule glows with its own color.

Special damage:

• The most common malfunction of "plasma" is associated with the burnup of the phosphor. For this reason, it is undesirable to place the TV in places where the sun's rays get on the screen. It is not recommended to permanently hold on the screen and static images, because individual pixels will burn out quickly.
• Often the breakdown of plasma TVs is associated with a software failure. The solution of the problem is the firmware update by the specialists of the service center.
• Adjusting the tuner or signal amplifier allows you to cope with the incorrect display of colors. More serious malfunctions of TVs are connected with damage of motherboards, receivers, controllers, microcircuits.
• The failures of the remote control, connected both with the banal malfunction of the console, and with the programming error of the settings are quite common.

Important! According to statistics, the cause of many breakdowns of a plasma TV is overheating due to dust accumulating in the cooling system. If the cooling fan stops showing signs of life, it is advisable to perform a preventive cleaning as soon as possible.

For LCD TVs:

• The cause of LCD TV failure in the form of broken pixels on the screen may be factory defects or mechanical damage. It is possible to eliminate such breakdowns only by replacing the screen. The cost of repair is commensurable with the purchase of a new TV.
• Less serious damage is due to a malfunction of the backlight or its cooling system.
• The cause of the "striped" screen or incorrect image may be the failure of the video amplifier, video processor or transformer.
• The power supply of the TV receiver may be damaged due to power surges in the network. Prevention of such a breakdown is the installation of a smoothing stabilizer.
• The appearance of "snow" on the screen - this is mainly due to malfunctions of the tuner( receiver) or antenna. There may also be no contact at the input of the signal reception.

The characteristics shown in this article will allow you to determine the type of the fault. After this, you must take the TV to a service center or call a master at home.