Why the TV remote doesn't work well: it doesn't turn on, doesn't change channels

Common problems with TV remote control

Information about using the remote control can be found in the technical documentation for the TV from the equipment manufacturer or in the online user guide on the corporate page.
To do this, you can enter your TV model number on the website, go to the “Manuals and Specifications” section and find the “remote control” section. In working condition, when you press a command on the remote control, the selected mode button at the top of the remote control should flash red. If this does not happen, you need to analyze the behavior of the TV and remote control.

Standard problems with the remote control of Dexp TVs when they cannot be turned on or off:

The LED does not blink.
The visible red light flashes several times.
Channels do not change or change slowly.
Problems with volume control.

To determine which of these conditions is causing the problem, follow these steps:

Open the battery compartment on the back of the remote control and remove both batteries.
Press and hold any button on the remote control for 20 seconds.
Release the button and insert the batteries correctly.
If the remote control responds, then there was a malfunction in it, which disappeared when turned on, when a reset occurred when discharged in the previous step.
If the remote control does not work and the TV cannot turn off, continue research further.

Most TV remote controls rely on an infrared signal that is transmitted over a distance and the TV picks it up. If the signal is blocked, you will need to check the area between the user and the TV to see if the infrared radiation is being blocked by anything, such as furniture, books or DVDs stacked directly in front of the TV.

The distance between the remote control and the TV also plays an important role. If the remote control does not work, you need to get close to the TV and check its operation. To do this, hold the remote control at a distance of about half a meter from the TV and press the power button. You can read the receiver's instruction manual to see how far apart the remote control and receiver can be. If the device aimed at the center of the TV does not turn it on, point it at each corner of the screen. If there is no progress, move on to checking the batteries. Weak batteries can also affect signal strength.

How can I solve the problem?

After the remote control has been diagnosed, the user can begin to select a method for repairing a broken device, each of which corresponds to a specific breakdown.

It should be noted that most of the breakdowns that occur in the remote control can be repaired by the owner himself.

Change batteries

Each user can independently replace the batteries on the remote control. To do this you just need to follow these steps:

First you need to remove the protective cover on the back of the device;
After this, you can remove the old batteries that no longer work and put new ones in their place. It is necessary to pay attention to the fact that a minus must be combined with a minus, and a plus with a plus;
Finally, the user can push the protective cover back into place.

Once the user completes the above steps, he will be able to use the remote again without any problems. However, it should be noted that the batteries in the devices discharge unexpectedly. Therefore, it is worth having a small supply of new batteries in the house, which may be useful in such a situation.

Check LED

The LED is one of the most important parts in a remote control. This small light bulb sends a signal with the necessary command to the TV system. If it breaks, the remote control will simply become useless.

First, it is recommended to inspect the LED for physical damage. There should be no dents or scratches on it, moreover, it should not be broken.

After this, the owner will need to check how correctly this light bulb works. The camera from your mobile device can help with this. You can check operation simply by pointing your mobile phone camera at the remote control and switching channels on the TV. If the user notices how the light bulb is lit, then he can rest assured that the LED is working correctly.

However, if during the inspection the owner did not see the light bulb, the device will have to be replaced. You can purchase LEDs in specialized electronic goods stores.

Open and check for internal damage

After physical damage, as a rule, the internal parts of the device suffer the most. As a rule, such damage is very easy to detect, since dents and scratches appear on the remote control.

However, there are also cases when, after a fall or shock, there is no noticeable damage to the device. In this case, despite the absence of dents, the remote control stops working correctly due to damage to the system.

In order to identify internal damage, you will need to open the remote control housing.

If individual buttons do not work

Individual buttons on the remote control may have stopped working for various reasons. Typically, this happens for the following reasons:

The graphite layer in the control panel has worn out;
Liquid has entered the remote control;
The device was mechanically damaged.

The user must understand that the buttons stop working correctly due to a certain breakdown and that they are not the cause of it. In this regard, before starting repair work, the owner should first identify the cause of malfunctions in the operation of a particular button on the remote control.

If there is an oily liquid inside

Quite often it happens that when you press the remote control, a dark oily liquid appears in it. In such a situation, as a rule, the user begins to think that some kind of liquid has got into the device. In fact, it is collected from the user's sebum, which is secreted from the pores of the fingers.

In such a situation, the owner of the device can very easily clean the remote control. To do this, he will first need to disassemble the remote control housing, and then thoroughly wipe all internal parts. Finally, you need to reassemble the control panel.

How to restore lost contacts

You can restore broken contacts in device microcircuits only with a soldering iron. A person must use this device with the utmost care and caution, since there is a high probability that even more serious damage to the remote control will occur if the remote control is moved incorrectly.

How to restore the graphite layer on the board

The graphite layer is located at the lowest level of buttons in the remote control and it is in very close contact with all the microcircuits in the device. During the operation of the device, the presented layer is very erased, and the buttons, in turn, cease to function correctly.

But, if such a problem occurs, the user should not worry, since it can be corrected independently at home without any problems. To do this, you first just need to purchase a special kit, which includes glue and additional graphite heels, at an electronic goods store. Afterwards, the owner of the device can begin the process of independently repairing the remote control.

It should also be noted that many people who repair phones replace the graphite layer in the remote control with ordinary food foil.

How to extend the life of your TV remote control

If the remote control fails, you can very easily repair it yourself or even replace it with a new one. However, if the device was purchased quite recently, then the owner should try from the very beginning to ensure that the remote control works for as long as possible. To do this, the device owner is recommended to simply follow certain rules.

Firstly, you must try to protect the remote control as much as possible from dust, any dirt, grease or other liquids. Purchasing a special case can help with this. You can also make it yourself using the simplest transparent film. Moreover, this will also prevent the buttons on the remote control device from being erased.

In addition, it is strongly recommended that you provide a separate place for the control unit and do not place it on dirty surfaces or touch it with dirty or wet hands.

Moreover, during operation, the remote control can become quite dirty, and therefore the owner of the device must clean it regularly. When cleaning, you must first clean the surface of the device itself. Cotton swabs, which must be thoroughly moistened with alcohol liquid in advance, will be a great help in this matter; you can also use the most common wet wipes. It is strongly recommended not to wash the assembled remote control in water or immerse it in liquid. This action will cause the device to completely stop working.

If the remote control is very dirty, for example, a large amount of grease or dust has accumulated in it, then more thorough cleaning will be required. To do this, you need to remove the batteries, unscrew all the screws, and also open the halves of the device. The covers and gasket with rubber keys can be washed in soapy water, and if necessary, you can also remove sticky dirt with a brush. You shouldn’t get the board with the LED wet; it’s better to just clean all the contacts. Finally, you need to reassemble the device.

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Basic faults

You need to start with diagnostics. To determine the possible causes of a remote control failure, you need to use the elimination method. First you need to check if the TV is working properly. If the channels do not switch even from the panel, then this is the reason. It is impossible to fix TV hardware failures without professional equipment. Therefore, in such situations, it is wiser to contact a service center.

Why doesn't the remote control work? There are several reasons: mechanical damage, moisture, excessive dust on the chips. To repair it yourself, you need to be well versed in electronics, have a soldering iron at your disposal and know how to use it. The main symptoms of a remote control failure:

there is no response, that is, the user presses the button, but nothing happens;
Some commands are not executed due to damaged buttons.

Now let's look at the most common causes of remote control malfunction, and also look at how you can restore it.

Lost signal

The TV does not turn off/on using the remote control; the indicator reacts, but there is no action, or the TV begins to respond only after pressing any button multiple times. This malfunction occurs more often on Philips and Samsung TV brands - try to solve this problem by simultaneously pressing Program and Volume on the front panel of the TV. If the problem persists, you need to reflash the product system to the latest software version, then your TV will turn on the first time.

The batteries are low

This failure of the TV remote control can be easily detected using a tester, multimeter or voltmeter. Check power supplies. The minimum value should be 1.3 V. If lower values were obtained, then you need to purchase new batteries.

What to do if there is no special tester or multimeter? It is extremely easy to determine that the batteries are the cause of the remote control malfunction. We use the method of elimination. All buttons are pressed, but the remote control does not work. It did not fall before and no liquid got on it.

Be careful when replacing batteries, you should not confuse “+” and “-”. The positive terminal visually resembles a spiral, while the negative terminal has an elongated shape. If replacing the batteries does not solve the problem, then you should continue the diagnosis.

Entry of moisture and dirt

What to do if the buttons on the remote control do not work? Channels switch only after several key presses or there is no response at all. It is possible that the button sticking effect occurred due to excessive contamination of the remote control. Similar problems also arise due to the fact that the user spilled water, tea or any other liquid on the remote control.

The liquid penetrates inside the remote control and becomes a catalyst for short-circuiting the contacts. It can also settle under the rubber contacts, forming a sticky layer. Some buttons stop pressing. Many users do not know how to eliminate the effect of sticky keys. Therefore, they begin to press with all their might on the remote control. This is a bad decision and causes the buttons to break.

In order not to aggravate the problem, you need to disassemble the remote control. If you find a sticky layer on the elastic or dirty contacts, then proceed according to the following algorithm:

Use a lint-free cloth dampened with alcohol to remove stains. Cotton pads cannot be used as lint will remain.
If a sticky spot has formed on top, then the rubber band can be wiped with a regular ear stick. Pre-moisten it in alcohol.
A sticky coating remains on the body and must also be removed.

The contacts on the microcircuit and on the rubber band must be cleaned as carefully as possible. Do not use excessive force as this may damage them.

Low-quality remote controls (non-original) react poorly to alcohol and cleaning products containing this substance. To prevent the damage from getting worse, dilute the cleaning fluid with water.

When all components are cleaned, you need to leave them disassembled for about 24 hours. They must dry. Be sure to clean the battery contacts. Some people use sandpaper for this, but this must be done extremely carefully.

How to check?

When the TV does not turn off with the remote control, and also does not respond to other manipulations with the buttons, it is recommended to check the equipment:

Point the remote control at any camera, press the button. A white stripe will appear coming from the signal transmission sensor. A person is not able to notice such a signal, while a camera is able to record it. This proves that the device is working properly, and it is not the device that needs to be looked for for problematic issues.
Check if the indicator or LED on the remote control lights up. If the buttons work and the TV picks up a signal, then the indicator light is bad. It does not directly affect the stability of operation, so there is no need to change it urgently.
Does the indicator on the TV device light up? Pressing the buttons is always carried out with some LED interference. The signal will flicker, indicating that it is receiving a transmission from the PU. If it stops flashing, there is no signal reception.
There is no match in signal frequency. Separately, the TV and its remote control work properly, but they do not match in frequency. In this case, adjustment of the parameters is required, which can be performed by a specialist using tools and equipment.

Sometimes the TV remote control buttons do not work due to mechanical damage. If moisture gets inside, it burns the board. Due to a strong impact, the keys also move away and the contacts are disconnected. In this case, hardware repair or purchase of a new remote control is required.

After repairing the control unit, you need to check all the settings again and adjust the parameters. Therefore, it is better not to do this yourself, but to entrust the work to the experts. They will not only correct problematic issues, but also set up the equipment so that later it does not cause you trouble during operation.

Cracks due to impacts

Mechanical damage can cause several types of remote control malfunctions:

the connecting contact with the board is broken;
board cracked.

To understand why the remote control does not work after a fall, you need to disassemble the device. This must be done as carefully as possible. Follow the step-by-step instructions:

Remove the back cover and then remove the battery.
You need to insert a knife, screwdriver or other sharp object between the halves of the remote control.
Turn the knife or screwdriver a little so that a gap appears between the halves of the remote control. You will hear a click, indicating that the latch has opened.
Continue to push the device apart, thereby releasing other fasteners.

The microcircuits are connected to each other using thin cables. Check to see if one of the boards has turned off due to the remote control hitting a hard surface. To prevent hardware elements from moving, they need to be soldered. What to do if the remote control stops working due to a board failure? The component can be repaired.

Solder the broken traces with thin wires. They must have appropriate response elements. Otherwise, a short circuit may occur. In cases where a crack appears under the resistive layer, the remote control cannot be restored. Therefore, you will have to buy a new device.

Repair and service guarantee

Repair of the remote control module will depend on the nature of the failure. If the user has filled it with water or any liquid, it is acceptable to solve the problem yourself. The first step is to disassemble the device and inspect the printed circuit board. Using careful movements, use a special solution to treat damaged contacts and microcircuits. If pressing the keys is too hard, the buttons cannot be restored and will have to be replaced.

Only the most experienced users are recommended to troubleshoot problems themselves; otherwise, it is recommended to seek professional help. Lack of experience and dexterity can lead to the formation of new damage. Replacement or repair of hardware components should be carried out by specialized services.

When it is necessary to perform service setup, for example, update the firmware, a technician can be called to your home.

If you purchase a TV from official representatives, it is recommended to study the warranty card. If its validity period is still valid, you should seek assistance from the place where the equipment was purchased. Do not forget that any product has a certain service life. When a device is outdated or worn out, it is more convenient and economical to purchase a new device.

Mechanical wear

Some buttons do not respond due to the fact that the layer that was applied to the entire surface of the elastic band has worn off. Even in such a situation, you can repair the remote control yourself. If the conductive coating has worn off, you will not be able to apply it yourself. However, the problem can be solved in other ways:

Purchase a special kit for the remote control. It includes round contacts designed for carrying out repair work at home. Glue the contacts in the required place.
If the kit you need is not on sale, then instead of contacts you can use ordinary foil. It must be glued to the place where the conductive layer was located.
Assemble the remote control and check its functionality. Press the button to change channels or adjust the volume.

Principles of controlling a television receiver with a remote control

The TV control panel is designed to transmit commands to the device at a distance . It provides more comfortable interaction with technology, because to change the channel or adjust the volume, the user does not have to go to the television panel and press the desired button on its body.

The interaction between the TV and the remote control is carried out via an infrared channel. This type of communication is the most popular and is also used to transmit a signal to other household appliances, for example, for remote control of a projector, split system, stereo system, etc.

Important! The principle of operation of the remote control is one-way or two-way transmission of data between the remote control and the TV (or other device) using rays of light in the infrared range. Reception and sending of commands is carried out through infrared receivers and transmitters.

As a rule, for most equipment, the remote control operates through a one-way channel: a command is sent to the remote control by pressing a certain key, which is then sent to the device that performs the required task.

The two-way channel is used less frequently and is mainly used to control air conditioners and split systems. This happens as follows: the remote control sends a command, and in response receives data about the temperature in the room and the operation of the device in order to display this information on the built-in display.

Using the remote control, the user can send a command to the TV to perform more than just basic actions. Modern TV panels with Smart TV functions use the remote control to access the Internet, use applications, type text, and perform many other tasks.

On a note! Modern SMART TVs usually do not provide for setting up or entering the menu through buttons on the control panel (on the body). These functions can only be accessed from the remote control.

For all these reasons, a malfunctioning remote control can be a serious concern for the user.

TV malfunctions

If you checked the remote control and it works, then the problem is located directly in the television receiver:

Photodetector defect.
The processor is faulty.

These are complex cases and it is impossible to fix them on your own. You will need to replace some parts or update the TV software or re-flash its processor.

Lenbyt masters will successfully cope with all these tasks.

No signal frequency matches

Typically, users of a universal remote control may encounter this situation. In this case, the LED on the TV blinks, creating the appearance that the signal has been received, but in fact the panel is not turned on by the remote control. What to do in this case? Try to find a similar model of someone you know and test the device on it. If this is not possible, then you can check the functionality of the device in the store. And if it turns out that its frequency settings have gone wrong, then you need to contact the service center so that the technician can eliminate the defect.

Turn on/off TV devices

If the TV does not turn on from the remote control, use the control panel. Press the corresponding power button, and if the device turns on, then the problem is really with the remote control. Otherwise, it is necessary to disassemble the technical part of the main device and find out why it does not start.

It is recommended to read the operating instructions, which describe some simple problems and solutions. All brands, such as LG, BBK, Sony, Supra or Thomson, have their own characteristics of use. Therefore, it is extremely important to know what the manufacturer recommends.

Extraneous interference

If the batteries in the remote control are working, there is a signal, but the TV still doesn’t turn on or change channels, then the culprit is extraneous interference. This situation can occur if there is a bright light source next to the TV, which “clogs” the signal from the remote control.

Another reason could be a source of electromagnetic waves nearby. This phenomenon occurs if the TV is located next to a microwave oven.

To make sure that it is extraneous interference that is interfering with the reception of the signal from the remote control, you need to turn off all devices located near the TV and try to turn on the TV. If in this case there is no signal, the indicator on the TV does not blink, then you need to look for another source.

Check the remote control for integrity. If it is damaged, it needs to be replaced.

Mechanical breakdowns

Such breakdowns include a problem with the matrix. The matrix is the main part of the screen on which the image is viewed. The matrix can be broken and then you cannot do without the help of a master. In order not to damage it, you need to keep harmful pets, fidgety children and other possible threats away from it.

It happens that the TV does not respond to the remote control. For example, "Samsung" may not respond to the remote control. The buttons on the remote control may not change channels or perform their functions. The buttons on the TV itself may not switch - in this case, you need to check whether the TV has child protection. These operations are explained in the manual of your TV model.

If one button does not work, it may be worn out or the contact has come loose. Modern technologies allow you to use an alternative to the remote control - telephone applications. Thanks to apps, you can transmit the signal better and save money on the remote control. Malfunction of buttons on the TV and remote control is a problem that is familiar to all TV lovers.

If the buttons are damaged, the TV will not respond to signals. The reason may also be incompletely soldered connections. To obtain contact, you need to remove the body or cover of the button and work with a soldering iron. Such soldering does not require any special skills, and if you practice on a couple of boards, you can restore the signal on the TV.

How can I fix the situation?

If the TV remote control does not work, then you can find several solutions to this problem:

Repair the faulty remote control.
Buy a new remote control.
Download a special application on your smartphone that will allow you to use your phone as a remote control. This is not a full replacement of the remote control, but this option can be used during repairs or before purchasing a new remote control.
High-quality TV repair in a service center. If the remote control is not to blame for the fact that the TV does not respond to it, then you need to call a professional technician. Service specialists will repair your TV at home at a convenient time. We repair LCD, plasma, picture tube, and old black and white models.

Why the remote control doesn't work

If your remote control does not affect the TV, then there can be many reasons, and only an experienced technician can understand the essence of the problem and establish an accurate diagnosis. With the help of special diagnostics, the cause will be found in a short time, and often it lies in other devices - this requires completely different actions. However, there are also quite banal reasons that cause problems with remote control.

The buttons on the remote don't work at all

If the problem is not the batteries, then you should check the buttons, namely, press everything. If the TV does not respond at all to pressing buttons, then the situation is bad and there are 2 options: either the remote control is completely out of order or the problem is in the TV receiver.

The development and reduction in cost of technology today has led to the fact that in the vast majority of cases, it is cheaper to buy a new remote control than to repair and tinker with an old remote control. But if buying a new remote control does not solve the problem with controlling the TV and it does not respond to any of the buttons, then the problem is in the TV itself.

Light-emitting diode

In addition to the batteries, the malfunction may be in the infrared LED. It may break off or simply fail. It is impossible to simply determine whether the device is in order or not: for this you will need a smartphone.

To test the operation of the remote control using a mobile device, the following conditions must be met.

The TV remote control must have an infrared sensor.
You will need a smartphone with a camera.

The sequence of steps to check the operation of the IR sensor using a phone is as follows.

Turn on your mobile device's camera. In this case, the screen will display what falls within the camera’s coverage area.
Point the remote control at the turned on camera and long press one of the buttons. It is best to press the TV receiver on/off.
If the remote control is active and the IR sensor is working, a reddish or blue-violet light from it will be visible on the smartphone screen. The weaker the light, the worse the remote control works. Poor performance may be due to problems with the batteries or oxidation of the contacts. Repairing these elements will help the device function properly again.

Attention! When checking the LED operation, the room should be dark.

Using this technique, you can identify those remote control buttons that do not work and repair them. Sometimes specialist advice is required. If the device cannot be repaired, you will need to purchase a new remote control.

The buttons on the remote don't work - some are bad

If the buttons on your remote control do not work, but not all of them, but only some, or you have to apply a lot of force to operate them, then most likely the problem lies in dirt that has gotten inside the remote control. In this case, you should disassemble and wash the remote control.

The most common cause of a non-functioning remote control is spilled sweet tea, coffee or soda. Sugar dissolved in drinks forms a sticky film on surfaces that prevents buttons from being pressed, acting as an insulator.

TV is faulty

If the screen (matrix) is broken, all the boards and power supply are burned out, then it is better not to repair the TV, but to buy a new one. If you have power surges in your home, to prevent anything from burning out, install protection and sometimes look at the parts of the TV.

Now, in times of technological progress, smart TVs are gaining more and more popularity. Thanks to smart TVs, you can watch your favorite shows and movies via the Internet. The most famous Smart TVs are LG and Samsung. These TVs have built-in modern signal receiving receivers, and stores give them a warranty of at least three years. Smart TVs can be controlled using a phone application.

Of course, even TVs with titanium coating and heavy-duty circuit boards can break. Be careful when choosing a TV and then you will be protected from many problems and malfunctions in the future. Now you know what breakdowns most often occur with a TV.

How to clean the TV remote control

We remove the batteries and unscrew all the screws, if any. Often the screws can be hidden under some stickers, rubber feet or in the battery compartment. Next, we hook up all the plastic latches in a circle. We act carefully, without violent actions - they are easily disrupted.

After removing the back cover of the remote control and getting to the insides, we remove the board. It can be held on by screws. If you look at the board, you can see wet marks on its surface. We will wash them.

Under the board there is a keyboard rubber band, which can be divided into two. The elastic band is also smeared with some vagueness, so we will wash that too.

The principle of operation of these buttons is very simple - there are two closed contacts on the board. These black patterns are the contacts. If you look closely, they look like scallops moving into each other.

On the elastic band, on the inside of the buttons, there are closing circles. When pressed, these circles close contacts on the board with each other. This is how the remote control recognizes the press and then transmits the command to the TV. The button will spring solely due to its shape and the fact that it is made of rubber.

Essentially, these buttons are of an open design and, as a result, any dirt between the board contacts and the closing pad inevitably leads to poor operation.

How to wash the remote control

Having disassembled the remote control, we separate all the plastic and rubber parts and go to the bathroom, where we thoroughly rub the remote control body with a soapy brush, after which we thoroughly rinse off any remaining soap.

Rubber bands should be treated more gently. The part of which they close the contacts of the board is a conductive material applied to a rubber base. Do not scrub them with a brush. It is better to gently rub with soapy hands or simply rinse under warm water.

We send the washed parts of the remote control to dry on your favorite towel. It is advisable that the towel be clean. You can wipe it off, but again, do not rub the conductive areas on the elastic bands.

Unidentified oily liquid

Having discovered that the TV remote control does not work and disassembled it, you can see a colorless oily liquid on the bottom of the keyboard. Do not rush to blame your relatives if one of them spilled sunflower oil or sweet tea on the device. This liquid is nothing more than oil secreted from the pores of the fingers. During operation of the remote control, it settles on the buttons, as a result of which contact between them and the pads is lost.

This problem can be solved very simply. It is enough to disassemble the remote control, wipe the board and the bottom of the keyboard with alcohol, and the device will work like new. Before starting use after this procedure, do not forget to dry the wiped elements.

Will film help?

You've probably seen remote control devices wrapped in plastic film. This method was undoubtedly invented by our compatriots in order to protect the remote control from the possible consequences of careless handling. Yes, the film can temporarily protect the device from moisture and dust. But over time, it loses its protective properties due to the same intensive use. Whether it’s worth turning the remote control into an incomprehensible and funny object is up to you to decide.

How to extend the life of your TV remote control

To keep your TV remote control working as long as possible, use the following tips:

Try to handle it carefully, avoiding dropping it on the floor.
Do not give the remote control to children and protect it from “encroachment” by pets.
Monitor the status of the LED.
Don't forget to change batteries on time.
Do not use the remote control when your hands are dirty or while eating.

Sources

https://tv-vybor.ru/stati/446-televizor-ne-reagiruet-na-pult-upravlenija.html
https://ProSmartTV.ru/tehnologii/ne-rabotaet-pult-ot-televizora.html
https://lenbyt.ru/neispravnosti/pochemu-televizor-ne-reagiruet-na-pult-upravleniya/
https://audiogeek.ru/ne-rabotayut-knopki-na-pulte-televizora/
https://FB.ru/article/281818/ne-rabotaet-pult-ot-televizora-prichinyi-remont