The TV does not turn on the first time reasons

To determine why the TV cannot be turned on, you need to conduct a comprehensive diagnosis. Experts recommend paying attention to the indicator, which indicates the type of malfunction. There are quite a few catalysts for the appearance of violations: from wiring problems to processor failure. Let's analyze why the TV won't start and how to quickly restore the correct operation of the equipment.

The indicator lights up red

The situation when the TV cannot be turned on using the remote control or buttons on the device itself, and the indicator is on, is often encountered in repair practice.
Usually, in such cases they say: “The TV does not come out of standby mode.” There may be several reasons for this, but we need to start with the most obvious ones. Replace the batteries in the remote control, remember which button the TV was turned on from earlier and, if this does not help, call a TV technician or, with the proper skill, start repairing the TV yourself. The glow of the indicator, with a greater or lesser degree of probability, indicates the operability of the power supply. However, diagnosing this malfunction, like most others, should begin with an analysis of the operation of this board. Checking the voltages in standby mode, their stability when trying to switch on the operating mode, measuring the level of filtration, visual inspection of parts helps to assess the performance and functionality of the power supply. Electrolytic capacitors, the upper part of which has characteristic swelling, require unconditional replacement.

In the “TV Malfunctions” section, real stories of TV repairs with a similar defect are considered using the example of Philips 42PFL7433S/60, SAMSUNG LE40R82B, Philips 20PF5121/58 TVs and other models. The behavior of television receivers was somewhat different, but the reason was the same. There was a change in the properties of electronic components, mainly capacitors, in which the power supply could not provide a reliable start, affecting the operation of the entire system so that the indication was present, but the TV did not turn on. If in one case the fault was visible to the naked eye, then in another, a long process of diagnostic measures and measurements was required to localize it.

Eliminating an obvious defect in the power supply does not always lead to normal operation of the TV as a whole. In some cases, unstable power supply leads to loss of information in Eeprom and SpiFlash memory chips. At the same time, you can ensure that the TV turns on and goes into operating mode only by updating the software (firmware) on the programmer. The workshop is equipped with these devices in sufficient quantities for different types and packages of microcircuits. When doing repairs yourself, difficulties may arise with updating the firmware without equipment and a firmware database for television models, and contacting a service organization in such a situation is morally and economically justified.

Sometimes such troubles occur when there is a malfunction in the power circuits on the TV system board. Typically, this block contains several secondary sources made according to the circuit of DC-DC converters or voltage stabilizers. An indispensable condition for the correct operation of the processor and devices associated with it is a stable supply voltage in the voltage range at which their normal functionality is ensured. In cases where these conditions are not met, the consequences may be unpredictable, and the command to turn on the device may be ignored until the necessary power parameters are provided.

The indicator changes color to green and back to red

This behavior most often indicates that the processor generates a command to turn on the device and sends it to all executors. If one of the TV units does not carry out the command, for example, the power supply does not turn on in operating mode or the inverter is not able to start the backlight, then the processor, without receiving confirmation that everything is in order, cancels the switch on and puts the device back into standby mode. In Sharp LCD TVs, if there are five unsuccessful attempts to turn on the backlight, the processor blocks the startup completely, until errors are cleared through the service menu or until the contents of the Eeprom memory are replaced. This behavior will continue until the cause is eliminated: the defective lamps are replaced, the inverter, power supply or other faulty component of the television chassis is repaired.

The indicator changes color to green, but nothing happens

The situation is ambiguous and there may be many reasons for this behavior. In order to verify the functionality of the main board, the supply voltages are measured and commands to turn on the power, backlight, etc. are examined. It is possible that when you switch the TV to a channel with a customized program, sound will appear, and this already indicates that the cause of the malfunction most likely lies in the inverter or LED backlight power supply or radiation sources.

If the LED (light bulb) indicates the operating state, but no commands to turn on are received from the motherboard, the system does not respond to buttons and the remote control, software failures of the memory devices on the main board are quite possible. There are situations when the processor issues a command to turn on the power supply, but does not start the inverter, or issues the Dimm command, which determines the brightness of the backlight, in the absence of an On/Off command. In this case, software updates and firmware help return the normal sequence to the logical processes occurring on the motherboard.

In some cases, the appearance that nothing happens when turned on can be created by the motherboard blocking the supply of signals to the matrix controller or transmitting such information that the screen remains dark. The T-con itself may be faulty, as well as the LCD matrix itself. Each option is considered and diagnosed separately. The backlight turns on, but has a weakly defined character due to the reduced brightness of the image.

The indicator (light) constantly blinks chaotically

This state of the device only indicates a malfunction and does not contain significant information about possible problems. It is necessary to diagnose the entire device, starting with checking the power supply and secondary converters on the system board. Next, we examine the information exchange buses between the processor and memory chips, the processing of commands by the processor to turn on, and the processing of these commands by the peripheral components of the television chassis.

LED red

A common situation. when the TV cannot be turned on using the remote control or buttons on the device itself, and the indicator is on. Usually in such cases they say: “The TV does not come out of standby mode.” There may be several reasons, but the most obvious is needed first. Replace the batteries in your remote control, remember which button turned on the TV first, and if that doesn't work, take it to a TV technician or, if you have the skills, start repairing the TV yourself.

The indicator light more or less likely indicates a good power source. However, diagnosing this fault, like most others, should begin with analyzing the operation of this board. Checking the voltages in standby mode, their stability when trying to turn on the operating mode, measuring the filtration level, visual inspection of parts helps evaluate the efficiency and functionality of the power supply. Electrolytic capacitors, the upper part of which exhibits characteristic swelling, require absolute replacement.

In the “TV malfunction” section, the real history of repairing televisions with a similar manifestation of a defect is considered using the example of Philips 42PFL7433S / 60, SAMSUNG LE40R82B, Philips 20PF5121 / 58 and other models. The behavior of the TVs was slightly different, but there was one reason. There was a change in the properties of electronic components, mainly capacitors, in which the power supply could not provide a reliable start, which affected the operation of the entire system, so that the indication was present and the TV did not turn on. If in one case the fault was visible to the naked eye, then in another case a lengthy process of diagnostics and measurements is required to detect it.

The indicator flashes in a certain sequence

Television receivers from some manufacturers: Sony, Philips, Panasonic provide self-diagnosis of the TV when it is turned on. As a result of polling on the SDA and SCL buses, the central processor receives information about the performance of other functional devices: tuner, sound processor, memory chips, the digital bus itself, etc. If a faulty node is detected, the turn-on command is blocked, and the receiver goes into standby mode with error indication. The light indicators begin to blink in a certain sequence, indicating a particular error in the device.

This method of self-diagnosis allows you to quickly identify a faulty component. The service instructions for a specific model contain so-called error codes, in which each combination of blinking indicators corresponds to possible failures of various components of the television receiver. This makes life much easier for the telemaster during diagnostics, guiding him along the right path. For example, 13 LED blinks after a pause on a Sony TV on the FIX2 chassis indicates problems with the backlight. The inverter or lamps may be faulty, so we will diagnose them. As an example, I will give a table with error codes for Philips TVs on the Q552.1E LA chassis. We see the first level of errors (Layer 1) immediately when a defect occurs, the second level (Layer 2) can be observed if the receiver is switched to service mode.

To summarize, we can say that the behavior of the indicator light on the TV when a malfunction occurs can provide a lot of useful information for successful diagnosis and localization of the defect in a specific unit, contributing to the successful repair of the TV as a whole.

Source: tvrepair.ru

The indicator is on

If the indicator is on, it means that power is supplied to the control chip. Therefore, diagnosis should begin with a few simple steps. For example, if the device does not respond to the remote control, turn it on by pressing the “Power” button, which is located on the front panel. It cannot be ruled out that the cause of problems with turning on the equipment was the remote control.

Causes of remote control malfunction:

oxidation of contacts;
the infrared sensor is damaged;
the batteries are dead;
there is too much dust and dirt on the surface of the microcircuit;
some buttons are stuck and cannot be pressed;
The remote control is filled with liquid.

You can repair the remote control yourself or contact a service center. It is possible that it will be cheaper to buy a new device.

If the user pressed the power button on the panel, but the TV still does not work, then there are several more justifications for this. Most likely, the protection worked. The device may even turn on, but the screen will go dark after just a few seconds. The reason for the automatic operation of the elements of the protection system is voltage surges. Mostly, such failures occur when the electricity was turned off and the TV was in sleep mode.

This type of malfunction is very easy to resolve. Turn off the power to the TV for about 5-10 minutes. This interval will be enough to restore the device's functionality. Plug the cord into the outlet, and then start the TV using the remote control. If there is still no response, it means that the contacts have shorted or the hardware module has burned out.

If the light in your home goes out regularly or there are significant problems with voltage drops, then you need to purchase an uninterruptible power supply, surge protector or stabilizer. This will prevent premature failure of hardware modules.

It also cannot be ruled out that problems with turning on the TV arose due to a processor failure. The LED backlight is controlled via the Stand BY wire and transistor Q211. If a short circuit occurs in this unit, the TV stops turning on. To fix the problem yourself, you need to use a multimeter and buy new original components. Users may have significant problems with this. Therefore, it is wiser to contact a service center so that specialists can restore the functionality of the TV.

The indicator lights up red

In situations where the TV does not turn on and the indicator lights up red, you need to wake the device from standby mode. If you have the appropriate skills, you can do this yourself. If in doubt, then it is better to contact a service center to have the work done by specialists.

If the indicator is on, it means the power supply is working. However, diagnostics must still begin with this component. The level and stability of the voltage supply should be measured. It is possible that the TV stopped turning on because the cable supplying voltage to the base modules was damaged. It is also necessary to measure the level of filtration and conduct a visual inspection of parts. All these actions allow you to objectively assess the performance of all elements of the power supply. For example, if electrical capacitors are swollen, they need to be replaced.

What should I do if the TV does not turn on and the indicator is red? Practice shows that most often the cause of this problem is a change in the properties of electronic elements, mainly capacitors. As a result, the power supply is not able to ensure the correct start of the TV. Therefore, the indication is present, but the equipment still does not start. Quite often, lengthy diagnostic measures are required to localize a breakdown.

It is by no means always the case that eliminating an obvious breakdown in the power supply will allow the operation of the equipment to normalize. In some situations, problems with the voltage supply cause the loss of information stored in memory chips. What can solve the problem? The best option is to put the TV into operating mode by updating the system firmware. For this you will need a programmer.

Users will not be able to update the software on their own due to the lack of a programmer. Attempts to solve the problem using improvised means will lead to aggravation of the problem. Therefore, it is wiser to contact a service center to avoid new damage.

Problems with turning on the TV are also explained by short circuits in the power circuits of the system board. Mostly this component contains secondary sources located according to the DC-DC circuit. We are talking about converters and voltage stabilizers. A prerequisite for the correct operation of the processor and other modules associated with it is a stable voltage supply to all components. Interruptions will lead to limited functionality of the device.

The indicator is green

In situations where the TV does not start with the remote control and button, and the light is green, you also need to carry out a comprehensive diagnosis. There are many reasons why this problem occurs. First you need to make sure that the main chip is working correctly. To do this, you should measure the voltage of the main board, and also test the correct activation of the power supply and backlight.

It is possible that when you switch to a TV channel with a customized program, sound will appear. This indicates that the cause of the incorrect operation of the equipment is the inverter or power supply that supplies voltage to the LED backlight. It is imperative to check the functionality of the radiation sources.

How to turn on the TV if the indicator is green? The power-on command does not come from the mother chip. Therefore, the device does not respond to commands sent by the button or remote control. It cannot be ruled out that the problem lies in the memory devices located on the main board. In repair practice, there are situations when the graphics processor sends a command to turn on the power supply, but the inverter does not start. To set up these processors, you need to update the firmware of the memory chips using the programmer.

The system board is capable of blocking signals from the matrix controller. Therefore, when you press the power button, there is no response. In some situations, this problem results in sound appearing while the screen remains black. In this case, the liquid crystal matrix and T-con are diagnosed.

Troubleshooting hardware problems is a complex process that requires a lot of experience. Therefore, if the TV does not turn on for a long time or does not start at all, it is better to contact a certified workshop whose engineers know how to repair the TV and also use special equipment.

The indicator flashes

The flickering of the light indicates that the TV has independently determined the type of failure. The red indicator predominantly flashes a certain number of times. Open the instructions that came with the basic set of the TV to decipher the problem. The instructions indicate various types of breakdowns and their indication. Having determined the nature and specifics of the breakdown, you can take measures aimed at restoring the functionality of the equipment.

The indicator may also blink due to the fact that the TV was previously connected to the PC, so its screen is used as a monitor. It is necessary to wake up the computer from sleep mode to restore the TV. An alternative way to solve the problem is to use the TV as the main monitor.

If the TV does not turn on, move the computer mouse or press any key on the keyboard to deactivate sleep mode. The device functions correctly, the TV screen just does not light up. Immediately after the computer wakes up from sleep mode, an image will appear on the TV screen.

Problems with TVs of different brands

The nature of the breakdown may depend on what brand of TV you are using. Equipment from various manufacturers has special “weak” points. Service center engineers talk about this quite often. The following types of devices are available on the modern market:

plasma;
liquid crystal;
kinescope.

Now let’s look at the breakdowns common to equipment from popular manufacturers.

Samsung TVs

First you need to make sure that there are no problems related to nutrition. There are several options:

The power button located on the front panel of the TV does not work;
The remote control is faulty or the batteries are dead;
the power cable is damaged;
The socket does not work;
Electricity problems.

Practice shows that owners of Samsung TVs of the following models face similar problems:

le40r81b;
le32r81b;
le23r51b;
le40s62b;
le20s52bp.

Problems with switching on are observed even in the absence of visual damage. The complete absence of indication is an indicator of a burnt-out power adapter. Perhaps the socket is not working or there is simply no light. To change the power supply yourself, you need to disassemble the TV and carefully disconnect the broken module. To do this you need to use professional equipment and have the appropriate skills. If the equipment is still under warranty, contact an authorized service center.

Phillips TVs: where to look for the problem

Owners of TVs of this brand write in their reviews that the equipment quite often randomly goes into sleep mode. Modern models support functions that automatically switch equipment to “sleep”, which sometimes causes problems.

Try turning on the TV using the remote control. No reaction? Then unplug the power cable from the outlet and wait a few minutes before plugging it back in. Perhaps the problem did not appear due to sleep mode, but due to hardware failure. In this case, it is better to trust the specialists.

A black screen indicates a breakdown of the backlight, processor, or simply incorrect connection of the antenna cable. Check the wire for damage.

In some cases, the screen lights up, but the image disappears almost immediately. This is an indicator of a faulty inverter or matrix. It is better to entrust such an expensive type of repair to professionals.

If the TV takes too long to turn on, then the problem may lie in the power supply units. The voltage supply may be insufficient.

LG TVs

A popular brand that many users associate with the optimal balance of availability and low price. Problems with display most often arise in the operation of the following models:

42pa4510;
ld33b;
42ld650;
42la621v.

The accompanying documentation describes the indication codes. By correctly interpreting the flickering LED, users will be able to independently restore the operation of the equipment.

The indicator is not lit

This is a sign that the problem may be a lack of power. In some situations, the light does not light up, but the TV turns on. In this case, it has burned out, therefore, it is necessary to change the indicator. There is no point in calling the service center prematurely. First you need to determine the cause of the problem. You can fix some problems yourself. The TV does not turn on and the indicator does not light up for the following reasons:

There is no power at the outlet. It may be broken, but you also need to check whether the switch in the panel is turned on. You can check the functionality of the socket using a regular indicator screwdriver or tester. Problems related to wiring are extremely difficult to solve on your own, so it is better to call a professional electrician.
The TV power cable is connected to an extension cord, but it is faulty. If the cause of problems with turning on the TV is the surge protector, then you need to test the functionality of the fuse and the power button.
The Network button is disabled. This key is located mainly on the bottom, side or back panel. If the button is disabled, then you will not be able to turn on the device from the remote control. Click on the “Network” button for the TV to start working correctly.
The mode is set incorrectly. If the user selects the wrong signal source, such as AV or HDMI, then the image disappears and a black screen is visible. It is possible that an automatic transition to sleep mode will occur. In this case, you need to select the digital TV mode again to normalize the operation of the equipment.
Failure of basic modules. Due to mechanical damage and short circuits, microcircuits and capacitors break. The power supply and control system elements also burn out. It will not be possible to check the functionality of all components without special equipment. Therefore, you should call professional craftsmen.
The fuse has blown. CRT models are often not turned on precisely for this reason. Due to a broken fuse, there is no voltage supply. Restoration involves replacing a broken component.

Users who are well versed in electronics and also have professional equipment at their disposal will be able to repair the TV on their own.

Electricity problems

If a plasma TV does not turn on, this is not yet an indication of a hardware failure. The problem may be caused by poor wiring, a damaged cable, or a faulty antenna. First you need to check the outlet. Perhaps it broke due to a voltage drop. Try connecting the equipment to a different power source. If the TV starts, then the cause has been determined correctly. In situations where the proposed recommendations did not help, you need to contact the service center. Professional technicians will carry out comprehensive diagnostics, during which they will identify faulty components.

Electrical problems lead to hardware failures. Voltage fluctuations become a catalyst for fuse blowing. Failure of this component prevents the TV from starting correctly. When the indicator lights up in normal color, you need to check the connection of the device with the source of the television signal. Change the signal source, for example, select HDMI, USB. Connect a USB flash drive or laptop to the TV through these interfaces. Try to reproduce some content. If everything is displayed correctly, then the problem is the lack of a TV signal.

Voltage drops can also be expressed in the appearance of noise when starting the TV, clicks are heard. The loading time of Smart TV increases significantly. All these symptoms indicate one of these breakdowns:

power supply is overloaded;
the protection system was automatically activated;
hardware modules burned out;
The power supply burned out.

All modern devices are equipped with a special blocker that prevents hardware modules from burning out. It turns on automatically after power surges. Therefore, problems arise with starting the equipment. Sometimes, in order to disable the blocker, you have to disassemble the TV. Therefore, in such situations, it is better to contact a service center.

It is impossible to do without the services of professional craftsmen if the power supply chip is burned out or the capacitor is swollen. Electrical problems can also cause resistor burnout.

Source: ProSmartTV.ru

Why does the equipment not start immediately?

There are several reasons why the device is unstable:

The settings have gone wrong. Modern technology is characterized by an abundance of adjustments. And accidentally pressing a key combination on the control panel leads to software errors, in particular, to long startup times.
Mechanical damage. If the equipment was accidentally hit, contacts could come loose and individual mechanisms could be damaged.
High voltage, power surges. Often the problem occurs outside the city.

Several other events may also lead to the same problem.

When a new TV takes a long time to start up the display, consumers should contact a service center. Defective products are replaced under warranty.

The indicator blinks

Blinking or flickering of an LED usually means the power supply is not functioning correctly.

Inspect the outlet and network cable: it will not be difficult to notice mechanical damage to the periphery.

On the other hand, a uniformly blinking (flickering) red or blue diode is a sign of a faulty power supply located inside the device - in this case, there is no point in trying to carry out repairs on your own; we recommend contacting professionals from the service center.

What symptoms appear initially?

To quickly eliminate problem areas, it is important to identify their presence in a timely manner. The first symptoms in this case may be:

After switching on: beeps, clicks, displays poorly. Extraneous noise indicates a malfunction of the power supply. It is not able to supply energy to the screen in time for the user to see the picture/
The image from the display is accompanied by noise, horizontal/vertical stripes, dots, and other defects. In this case, most likely, the stability of horizontal and vertical scanning was disrupted.

When an image does not appear on a CRT TV for a long time, this is a normal situation. Lamp devices require warming up to start working. However, the duration is short, a few minutes are enough for a good picture to appear. Otherwise, the kinescope model will also need to be repaired.

Main reasons

Modern plasma or LCD TVs have a more complex hardware structure. But they are performed using new technologies, so even a second delay in turning on becomes the first signs of breakdowns. The most commonly observed are the following:

The capacitors on the power supply are dead/
Deployment failures.
Failure of inverters.
Exposure to high voltage surges that affect various technical parts.

Sometimes the malfunction lies in the control panel (RC). First, it is recommended to replace the batteries. If it doesn’t help, then most likely the buttons have moved away from the board. You can press the buttons harder for a while. But this method does not help for long. It is better to replace or repair the remote control.

Extraneous sounds

Humming, clicking, short beeping, uncharacteristic clicking when the device is turned on means:

failure of the power supply,
motherboard overload,
launch of automatic locking system.

The clicks that you hear are the sounds of the blocking system (the relay is activated), the main task of which is to prevent the TV from completely failing.

In such situations, there is no point in trying to fix the malfunction yourself - only experienced TV technicians can carry out a set of necessary works, which includes:

body disassembly,
full diagnostics of components,
disabling the blocker,
replacing a broken part.

It is necessary to call a specialist in case of a burnt-out microcircuit or power supply - these breakdowns are usually accompanied by a whistle (damage to the capacitors on the board) and a hum.

What should be done?

To resolve the problem, follow the instructions:

Diagnose the problem area. It is necessary to determine which part failed. Usually this is a power supply, but it can also be an inverter or sweep.
Repair a broken component. If you quickly detect the symptoms, then it is quite affordable to repair the damaged product. Otherwise, only replacement will be required. Sometimes a breakdown is visible visually, but often an inexperienced, ignorant user will not even be able to identify it, since serious technical knowledge is required.
Set up, adjust the work after repair.

Many people try to sort things out on their own. However, to carry out proper repair work, not only knowledge is required, but also special tools. In the absence of this, improvised means are used that are not intended to perform delicate, responsible work. They can damage neighboring components and lead to serious failures, which can only be fixed at great expense.

It is impossible not to note the danger of self-repair. Any interaction with electrical devices without proper knowledge will certainly result in injury.

How to quickly solve the problem?

To return to a stable working condition, it is better to contact Remontano when the first symptoms appear. Our masters:

They identify faults quickly and efficiently and make every effort to eliminate them;
They work professionally with any brands and models;
Check out available. Employees fix problems at home, and at a time convenient for the client;
Quality assurance.

The sooner you turn to experienced specialists, the cheaper the repairs are, since the breakdown does not affect more expensive hardware parts.

Source: remontano.ru

Why does the equipment not start immediately?

There are several reasons why the device is unstable:

The settings have gone wrong. Modern technology is characterized by an abundance of adjustments. And accidentally pressing a key combination on the control panel leads to software errors, in particular, to long startup times.
Mechanical damage. If the equipment was accidentally hit, contacts could come loose and individual mechanisms could be damaged.
High voltage, power surges. Often the problem occurs outside the city.

Several other events may also lead to the same problem.

When a new TV takes a long time to start up the display, consumers should contact a service center. Defective products are replaced under warranty.

Other reasons

Much less often than previous problems, the internal lock works. It's simple: if the diode burns out in standby mode after trying to turn on the TV, one of the chips is damaged and the automation opens the circuit. These are the manufacturers, so they reduce the risk of explosions and equipment fires.

Other reasons include software glitches or motherboard failure. Any of them requires separate diagnostics and can only be eliminated in service centers.

Source

What symptoms appear initially?

To quickly eliminate problem areas, it is important to identify their presence in a timely manner. The first symptoms in this case may be:

After switching on: beeps, clicks, displays poorly. Extraneous noise indicates a malfunction of the power supply. It is not able to supply energy to the screen in time for the user to see the picture/
The image from the display is accompanied by noise, horizontal/vertical stripes, dots, and other defects. In this case, most likely, the stability of horizontal and vertical scanning was disrupted.

First symptoms

When the TV takes a long time to turn on, the user is able to quickly determine whether there is a problem. Sometimes it is accompanied by accompanying symptoms:

image quality deteriorates;
the screen transmits a picture with noise;
extraneous sounds are observed: knocking, clicking, hissing;
The power indicator does not light up.

Often, when the TV turns on slowly, the user prefers to leave the problem without a solution. Over time, the problem will become more serious.

Main reasons

The capacitors on the power supply are dead/
Deployment failures.
Failure of inverters.
Exposure to high voltage surges that affect various technical parts.

Manifestation of a malfunction - how to identify a broken TV unit

Whatever the breakdown of the power supply, it will certainly affect the operation of the TV. Damage to this element is primarily indicated by the following signs:

The TV does not turn on;
the indicator light does not light;
You can hear the whistling of the pulse transformer, while the TV does not work because the power supply protection device is activated (this may also be a sign of failure of the LED backlight).

When the TV is turned on normally and various abnormalities in sound or image appear, these disturbances are most likely caused by some other reason, and not by a breakdown of the power supply. At the same time, there are some exceptions to this rule when the problem that arises is in one way or another connected specifically with the power supply:

the indicator lights up, but the TV does not start in operating mode;
when you press the power button on the device itself, the TV does not start;
At first only sound appears and only after some time does the image appear;
normal picture display and sound playback appear only after the TV is turned on and off repeatedly;
the appearance of stripes, background sound, and a broken image are observed.

What should be done?

To resolve the problem, follow the instructions:

Diagnose the problem area. It is necessary to determine which part failed. Usually this is a power supply, but it can also be an inverter or sweep.
Repair a broken component. If you quickly detect the symptoms, then it is quite affordable to repair the damaged product. Otherwise, only replacement will be required. Sometimes a breakdown is visible visually, but often an inexperienced, ignorant user will not even be able to identify it, since serious technical knowledge is required.
Set up, adjust the work after repair.

It is impossible not to note the danger of self-repair. Any interaction with electrical devices without proper knowledge will certainly result in injury.

How to quickly solve the problem?

To return to a stable working condition, it is better to contact Remontano when the first symptoms appear. Our masters:

They identify faults quickly and efficiently and make every effort to eliminate them;
They work professionally with any brands and models;
Check out available. Employees fix problems at home, and at a time convenient for the client;
Quality assurance.

The sooner you turn to experienced specialists, the cheaper the repairs are, since the breakdown does not affect more expensive hardware parts.

Source: remontano.ru

"Distance" problems

From the moment when remote controls were invented, relaxation in front of the TV was no longer overshadowed by regular running around to adjust the volume or change channels. Constantly improving, these devices came to the modern version:

the remote control includes an infrared transmitter;
The TV has a similar receiver.

And if at least one of these elements cannot function normally, you will have to forget about the opportunity to completely relax when watching multimedia. This is especially true for broadcasting - annoying advertising is also much louder than films usually. So, if you discover that the TV refuses to turn on from the remote control, the first thing you need to do is check whether it can be started by pressing the buttons on the TV panel. If the electromechanics are working properly, the problem is looked for in the receiver-transmitter. The first one is more difficult - here you will need the services of a telemaster.

The infrared receiver requires preliminary disassembly for further testing. Taking into account its location and the fragility of contacts, it is better to entrust this task to professionals.

But the remote control may start to act up due to:

falls - the soldering joints have come loose or the emitter (“light bulb” on the front end) has moved inside the housing, limiting the angle of the signal beam;
contact oxidation;
dead batteries.

A visual inspection will eliminate or confirm most of these problems. To ensure that the remote control is working, you can test it using your mobile phone. Just turn on the camera, point the emitter at it and press all the buttons one by one. Each operation is indicated by a diode glowing.

This test can also reveal partial loss of functionality of the remote control:

“sticking” of the button - the diode lights up even after it is released;
damage - does not light up when pressed.

If the remote control is confirmed to be faulty, it is simply replaced with a new one. Fortunately, this is no longer a question - there are even “universal” models that allow you to control several devices.

power unit

This problem can be reported when the TV turns on some time after receiving the command. It does not matter whether it was supplied from the remote control or from the built-in buttons. Usually the occurrence of problems is preceded by a voltage drop, as a result of which the capacitors burn out. Since these elements are partially restored when heated, the TV still turns on, although not immediately. You can verify that the “diagnosis” is correct simply by observing the operation of the device - squeaking, crackling and noise on the screen indicate the need to immediately contact a TV technician.

Replacing the power supply is a low-cost repair. And operating a TV with a faulty unit can lead to breakdowns, resulting in more serious damage.

Step-by-step instructions for repairing a TV power supply

Power supplies for modern TVs usually have a standard circuit. The existing differences boil down only to the size of the electronic elements and output power. In this regard, diagnostics and repairs occur using the same method.

Typical power supply circuit for a foreign TV:

Required tools and materials

For repairs, you should stock up on tools and materials, without which it will not be possible to properly fix the problem:

soldering iron with adjustable power;
solder, alcohol (refined gasoline), flux;
melted solder remover;
screwdrivers included;
nippers (side cutters);
tweezers;
tester (multimeter);
lamp 100 watt.

When starting to repair a TV power supply, you need to have a schematic diagram of the model on hand (if you don’t have one, you can download it online from the manufacturer’s official website).