TV malfunctions

The development of technology does not stand still, and it affects the television technology as well as possible. Modern television sets are very different from the first models. There is practically nothing in common between them. However, with the improvement of broadcast quality, new problems have also arisen related to breakdowns of modern technology (screen matrix, microcircuits, etc.). This article is devoted to a review of what are the most common malfunctions of TVs, their causes and solutions.

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There were problems turning the TV on and off

If the TV receiver does not turn on, the indicator for connecting the device to the network does not light, then most likely the power supply has failed. It could burn out due to “surges” in voltage.

Important! When you turn off the TV spontaneously, the problem is most likely the same.

If you take care of installing a relay that protects against voltage drops in the network, then it can turn off the device at the right time. If you haven’t done this yet, be sure to read which network filters are better.

With a stable voltage, the root causes can be as follows:

• The motherboard is damaged.
• The power supply burned out.

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TV does not respond to the remote control

This is one of the most common TV malfunctions. Most often, the point here is the malfunction of the console itself. Perhaps he accidentally spilled something on it or dropped it inadvertently. Or maybe the batteries are out of order.

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

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TV device memory does not work

This breakdown makes itself felt when you tune channels and want to remember them. Nothing comes of this venture. A similar situation with the sound settings. You set the necessary settings, and after turning off the TV receiver, they are not saved.

Most likely, the reason is that the memory chip is out of order.

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Buttons do not work

If no reaction occurs when the button is pressed, check whether the contact between the microcontroller and the button is broken. If the contacts are not damaged, then the problem lies with the processor of the controller.

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There are problems with the sound.

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

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Poor image quality or its complete absence

The causes of the malfunction of the TV in this case can be completely different. Some can be eliminated on their own, to eliminate others you need the help of a specialist.

• If the image is missing and the sound is saved, the cause is a malfunction in the video amplifier or matrix.
• If there is no image, and the sound periodically disappears, then the question may be in a faulty scan state.
• There is sound and the screen is lit, but the image is missing. The cause of TV malfunctions may be interference in the tuner or problems with the video processor.
• The image is rotated only half the screen. The frame scan of the matrix is ​​out of order. Most often, due to power surges.
• The appearance of a vertical narrow band on the screen indicates problems with the horizontal transformer. A horizontal bar on the screen indicates a frame scan malfunction.
• One-color image (as an option - the disappearance of a color). This indicates a malfunction of the video amplifier or video processor.

Important! Most of these problems require the replacement of expensive parts. That is, the repair is financially unprofitable. Therefore, in such situations, we recommend not to waste time and effort in vain, but to familiarize yourself with rated tvs to select a new device.

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TV matrix malfunctions

The matrix, in essence, is the main part of the screen, since the image is built on it.

Important! Most of the breakdowns of TVs associated with the matrix can only be solved by replacing it. This event is far from cheap.

The main causes of damage to the matrix include:

• Drop, hit with a heavy object.
• Water entering the matrix contacts.
• Manufacturing defects.
• Depreciation from continuous use.

Important! If the matrix is ​​damaged, this is accompanied by the appearance of circles, colored bars on the screen. The image may freeze or disappear completely. Only a qualified specialist can identify the type of malfunction and replace the damaged matrix with a working one.

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Possible problems with frame scan

The “Symptoms” that indicate TV malfunctions associated with a frame scan are as follows:

• Reduce or shift the image vertically.
• Misalignment.
• Appearance of lines in the image - this indicates a return path of the rays.
• Lack of staffing.

If there is no frame scan completely, a single horizontal strip appears on the screen. The whole problem lies in the incorrect operation of the frame scan generator.

Important! Only a person who is well versed in television technology can eliminate all these malfunctions. The most reasonable solution is to contact a service center.

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Can I troubleshoot a TV receiver myself?

Most of the problems with the TV are fixed by service center specialists. Here's what you can do yourself:

• If the TV does not turn on, check for mains voltage. Check the contact of the antenna connector, its connection.
• If the picture on the screen is of poor quality, you should try switching the receiver to other channels.
• If there is no sound, check the headphone connection, make sure the sound settings are correct. Sometimes the headphones begin to work after they are disconnected and reconnected.
• Check the batteries in the control panel, replace them if necessary.
• Check the contacts in the remote control - 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 by the principles of work, so some types of breakdowns are completely different.

For “plasma”

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

Special breakdowns:

• The most common malfunction of the “plasma” is associated with the burnout of the phosphor. For this reason, it is undesirable to place the TV in places where the sun's rays hit the screen. It is not recommended to hold static images on the screen for a long time, as individual pixels will fade quickly.
• Often, breakdowns of plasma TVs are associated with a software malfunction. The solution to the problem is the flashing of software by service center specialists.
• Tuner or signal amplifier settings allow you to cope with incorrect color display. More serious malfunctions of TVs are associated with damage to circuit boards, receivers, controllers, microcircuits.
• Failures of the remote control are quite common, associated with both the banal malfunction of the remote control and a software configuration error.

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 has stopped showing signs of life, it is advisable to carry out preventative cleaning as soon as possible.

For LCD TVs:

• Failure of LCD TVs in the form of the appearance of dead pixels on the screen may be a factory defect or mechanical damage. Such damage can be eliminated only by replacing the screen. The cost of repair is commensurate with the purchase of a new TV.
• Less serious failures are associated with a malfunction of the backlight or its cooling system.
• The cause of a “striped” screen or incorrect image may be damage to the video amplifier, video processor, or transformer.
• The power supply of the TV receiver may fail due to power surges. Prevention of such damage is the installation of a smoothing stabilizer.
• The appearance of “snow” on the screen is mainly due to malfunctions of the tuner (receiver) or antenna. There may also be no contact at the signal input.

Important! Remember that regardless of the type of panel, it needs regular maintenance. And it’s very important to use suitable tv screen cleaner.

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Stock footage

The symptoms listed in the article will allow you to tentatively determine the type of malfunction. After that, you need to take the TV to a service center or call the master at home.