LG is one of the most popular manufacturers of household appliances, but even the most expensive and functional devices from the South Korean company can stop working over time. There are a lot of reasons for TV failure, but don’t panic, because if a breakdown occurs, the first thing you will need to do is determine its origin. Anyone can carry out initial diagnostics of the device - you just need to know under what circumstances the LG TV does not turn on in principle. This article will help you understand this problem.
Causes
Select a fault to view typical faults
Does not turn on
1. The 220 volt network connector has become loose or unsoldered, 2. The power supply has burned out, 3. The control unit requires repair (defective, “died” or burned out).
No image
1. The inverter is burnt out, 2. The LEDs or backlight lamps are burnt out, 3. The image forming unit is broken.
No signal
1. The system board is faulty, 2. The antenna input is loose or unsoldered, 3. The TV tuner has stopped working.
Can't see the connected device
1. The connector is loose or unsoldered (USB, SCART, HDMI, tulips, etc.), 2. The Wi-Fi or Bluetooth module is faulty, 3. Incompatible devices.
Doesn't change channels
1. The system board needs to be re-flashed, 2. The control unit is dead, 3. The TV tuner needs to be repaired.
Regardless of what type of TV you have (LCD, plasma or CRT), the malfunction will make itself known in one of the following ways:
- the device will not turn on, although the LED indicator will blink as usual;
- the indicator lights up red and goes out;
- sounds uncharacteristic for the operation of plasma LED TV are heard - humming, clicking, whistling.
It is recommended to start searching for defects with external accessories and end with the inside of the device. First of all, make sure that the power cable is intact and, oddly enough, that the remote control is working, and entrust the diagnostics of the internal mechanisms of the TV to qualified specialists: even if you find a hardware problem (a burnt out board, a broken matrix), it is unlikely that you can actually fix it yourself.
In conclusion
If the LG TV does not turn on and the light is blinking, this absolutely does not mean that the equipment is completely broken. The device may not turn on due to a broken home antenna or problems in the power supply system. However, there may be more serious problems; some of them can be dealt with on your own, but there are also those where you cannot do without the help of a specialist.
Hello! My name is Petr Gras and I am the editor-in-chief of this portal. On this site, our team tries to publish the most relevant and important information about various technologies in the world of digital television. Glad you stopped by, welcome!
Electricity problems
If an LG TV does not show signs of life, this does not necessarily mean that the equipment has failed. The TV may not work due to problems connecting to the general household electrical network or a communal antenna: a damaged cable, a broken socket, problems with the local power supply - all this will also prevent the device from being turned on. Try connecting the device to another power source and starting it - if that doesn’t help, then you’ll have to turn to a TV technician for help.
A blown fuse is another possible reason for the inoperability of a liquid crystal or picture tube device produced by LV.
If the power light is on in the usual color (red, green, blue), then there is a possibility that the device is not communicating with the TV signal source. Start the monitor's standby mode and try to open any media file from a smartphone or flash drive connected via USB or HDMI on the large display. This way you can make sure that Smart-TV is working.
Power light flashes
Important! If the LED indicator blinks, this means that the device is trying to determine the type of malfunction. In most cases, the light is red and can blink a certain number of times - in this way it conveys a symbol of a breakdown.
To decipher the signal, you just need to read the instructions included in the basic package. It is recommended to find a section where all types of breakdowns are described and find the reasons why the light may blink. Having the information received, you can independently normalize the launch of TV by taking appropriate measures.
But there may be another reason for this state of the device - the device is connected to computer equipment and is used as a monitor. When the computer switched to sleep mode or turned off automatically, when you try to turn it on from the remote control, you will see that the indicator is on.
This problem can be solved simply, you just need to wake up the device from sleep mode by pressing any button on the computer keyboard or twitching the mouse.
The TV device is working, just connected to another image source.
The case cannot be ruled out. that the protection has been triggered, as a result of which the LG TV cannot turn on, and the indicator blinks. The reason for this is either device failure or software failures. It is possible that the device was simply not taken out of sleep mode.
Presence of extraneous sounds when turned on
If, when starting the TV, you hear a specific clicking or buzzing somewhere inside the device, the equipment does not start the first time or “thinks” for a long time before starting, then:
- several radio components overheated;
- the power supply has been overloaded;
- The power supply burned out;
- the power supply system safety lock has been activated, for example, after a thunderstorm or a strong voltage drop.
To avoid additional problems with the microcircuits, a protective lock is activated, preventing the device from being turned on - it is the lock that makes characteristic clicks. Here you will need the help of specialists who will be able to disassemble the TV body, disable the lock, and also carry out a thorough diagnosis and eliminate the main cause of the malfunction.
The services of a specialist will be needed if one of the microcircuits of the power supply unit has burned out, the capacitor has swollen (in this case you will hear a whistling and buzzing) or a resistor on the board has burned out. It is strictly prohibited to carry out independent repairs in case of such problems.
Wrong mode selected
The standby mode stops the display, but does not turn off the device itself - in other words, the TV functions, but this does not appear outwardly. In this case, you just have to use the remote control and switch the mode by pressing the Standby button.
It should be noted that this function does not turn off the power supply and therefore keeps the screen always “ready”, which makes the TV vulnerable to power surges.
Activated AV, HDMI and others modes can also prevent you from watching cable, digital or regular TV channels. If you previously connected a laptop to the screen and forgot to change the signal source settings back, then you may have to activate the TV signal source from the settings menu manually.
LG TV does not display in full screen or is not centered
In some cases, the TV won't fit the screen image into the frame and will cut off the edges of whatever you're watching. This can cause subtitles or even important parts of the image to be cut off if the problem is severe enough.
Reason: wrong aspect ratio
In some cases, your TV's aspect ratio may be disabled. Aspect ratio is the proportions of an image proportional to its height and width, as in 16:9, the common TV aspect ratio. Fortunately, this is easy to fix.
Solution
To correct your TV's aspect ratio:
- Press the smart button.
- Click Settings , Option , Mode Setting , then WHEEL or Enter .
- Set the mode setting for home use .
The matrix and/or backlight is burned out
The matrix and the LED backlight in it can deteriorate - such a malfunction happens extremely rarely, but sometimes even owners of new LG TVs encounter it. There are several main symptoms:
- There is sound, but no picture,
- Stripes or “highlights” on the panel,
- "Cobweb" of broken glass,
- The LG logo does not appear on startup.
Please note that the cost of repair work in this case will be high, and it is easier to immediately contact the retailer, who will replace the defective equipment with a new one under warranty.
Human factor
The human factor is understood as non-compliance with the rules for operating a television device. Before installing and using new equipment, you should always read the instructions or short guide that came with it - reading these documents will not take much time, but will help you avoid unnecessary troubles in the future. If you have already encountered a malfunction, the complete manual is still able to provide a service: LG engineers, in the instructions, describe some problems with their products and give the user advice on how to fix them on their own.
Do not exclude the possibility of damage to television wires and other peripherals. In this case, you won’t have to repair the TV itself: it will be enough to replace only the power cord and connector.
DIY repair
Some types of malfunctions can be eliminated without the help of specialists from the service center. Listed below are the main problems that even a user who is far from repairing electrical equipment can independently solve:
- “Protection against unauthorized access” mode. You may have accidentally activated the so-called “child lock”, which prevents you from controlling the TV from the panel built into it. In such a situation, use a remote control whose signal is not blocked by this function. After successfully starting the television, do not forget to disable the protection mode.
- Broken remote control. If the remote control is not working, you can use a special application for smartphones and tablets, which turns the smartphone into a full-fledged remote control. Here, as an example, we can mention the free TV-Remote utility from the AppStore and Google Play. It would also be a good idea to try to simply replace the batteries or accumulators in the faulty “remote control”.
- Socket. A dark TV indicator means that the device is not connected to the power supply. We strongly do not recommend repairing the outlet yourself, but any user can handle connecting the TV to another energy source.
- Weak signal/external interference. If there is no picture on the display, although the television itself is in an active state, the problem lies in bad weather conditions or problems with the cable provider. In this case, you need to call your communication provider to find out about any interruptions on the line, just wait a while.
- Connecting external devices. The television monitor is configured to display information from devices such as a smartphone, computer, tablet. Go to settings and make sure that the signal is not coming through HDMI or AV channel.
The power indicator is no longer lit
It happens that the device cannot turn on at all, the light does not light, the TV does not respond to the remote control and the buttons located on the front panel of the device. It is likely that the electricity has disappeared.
Important! It may happen that the indicator burns out, but then the TV should still turn on.
Based on the facts that the light does not light and the TV does not turn on, we conclude that there is a problem with the electricity supply.
Power failure occurs in several situations:
- there is no electricity anywhere in the house;
- the machine gun in the dashboard was knocked out;
- the socket where the cord plug from the television device is plugged in is broken;
- the extension cord is damaged if the TV device is connected to the outlet through it;
- There were problems with the electrical wiring.
The first thing to do first is to check if the outlet and extension cord are working properly. It is also necessary to look at the shield and change the position of the toggle switches.
If the previous action did not help, you should then look for the cause of the problem in a broken socket. To do this, it is recommended to simply plug the plug from the TV into another outlet.
When it doesn’t work, there is no electricity. To fix a wiring problem, you will need to call an electrician.
When the model of the TV device is a picture tube, the cause of its breakdown is a blown fuse. A blown fuse can be replaced with a new one.
Most often, the reason for the inability to turn on a TV device is a breakdown of the TV device of more modern models (for example, a breakdown of the microcircuit, power adapter or capacitor).
All equipment as a whole should be diagnosed. Once you have identified a part that is not working correctly, you should simply replace it. After replacing the broken part, the TV device should, in theory, turn on.
