There is a small light on the front of every LG TV that will occasionally blink. This blinking is usually temporary as the TV turns on or even when you use the remote. However, when your TV light starts blinking on its own and won’t stop, you know it is trying to tell you something. This guide explains why your LG TV light is blinking so that you can choose the best solution for you.
A consistent blinking light on an LG TV indicates an internal malfunction. The color of this light varies with different models. A factory reset or hard reset can eliminate software errors caused by a power surge/outage. Otherwise, damaged circuit boards will need to be repaired or replaced.
I will explain these different circuit boards and how they may be damaged below. I have also included the most common issue with LG TVs and included all the models that are eligible for a free replacement part.
LG TV Light Blinking/Flashing
A blinking light means that your LG TV has detected a serious fault with the internal hardware. Usually the TV will not turn on, but will alert you with the blinking red light. Below are the key components within your TV.
· Power Board
· T-Con Board
· Inverter Board
· WiFi chip
Of all of these components, it is the power board that usually causes this issue. However, sometimes the other components may be broken, which can also be detected by the TV. I will explain each of these components further down.
However, before you go down the path of spending money on servicing or replacing any of the hardware, you should try a hard reset or a factory reset. Sometimes a power surge or a power outage can create an error within the TV that makes it think there is hardware damage, when there is not. You can find these processes below.
Performing a Hard Reset
A hard reset will only clear small errors from the TVs memory, but is one of the only options if you cannot see the screen. This will also keep all of your downloaded content and saved preferences. You can perform this reset with the steps below.
Step 1: Turn of the TV and unplug all connected devices.
Step 2: Unplug the TV from its power source.
Step 3: Press and hold the power button on the TV (not the remote) for 30 seconds.
Step 4: Wait another 10 minutes before turning the TV back on.
Step 5: Check to see if the TV is working and reconnect all devices.
If you can see the screen, you can also try a factory reset, detailed below.
Performing a Factory Reset
Performing a factory reset will erase all downloaded content and your saved preferences, so it is not recommended unless you absolutely have to. However, if you suspect a hardware issue, it is a much easier option than opening the back of the TV.
Step 1: Press the ‘Home’ button on your remote.
Step 2: Navigate to ‘Settings (gear icon) > General > Reset to Initial Settings’.
Step 3: If you are prompted to enter a code, the default code will be either ‘0000’ or ‘1234’.
Step 4: Confirm the factory reset.
Step 5: Wait for the TV to fully reboot to see if it is working again.
Step 6: Follow the on-screen instructions to finalise the setup.
If your TV has overheated, it will act the same as if there were an internal failure of one of the circuit boards. The TV will shut down with a flashing light to indicate that something is wrong, but this is a protective mechanism to prevent damage from the excess heat.
The best thing to do in this situation is perform a hard reset, mentioned above, so that the error can be cleared from the TVs memory. The 10 minute period of waiting may be enough to cool the TV down. However, if it is still overheating, try leaving it unplugged overnight instead.
Once your LG TV is running normally again, you will need to determine why the TV overheated in the first place. Make sure the vents at the back of the TV are uncovered and clear of dust. You can also consider moving your TV away from direct sunlight, or moving other devices away from the TV.
Circuit Board Issues
Power boards are the biggest cause for internal damage within an LG TV. The power board is a circuit board that converts the higher voltage going into the TV into smaller voltages that are distributed to the other internal components of the TV.
The most common issue with the power board is a worn capacitor. These usually block dangerous currents from damaging the rest of the components in the TV. These are cheap and relatively easy to replace.
The main sign to look for in a worn capacitor is that it will change shape. It will change from its normal flat/cylindrical appearance to looking bulbous, with a rounded top. It is easy to identify a worn capacitor because there are many capacitors to compare to on the power board.
LG have acknowledged that there is a fault in the power boards of many of their TVs. For this reason, any of the models listed below that were manufactured between 2016 and 2019 are eligible to receive a free replacement power board.
· 2016: OLED65E6, OLED65G6, OLED77G6
· 2017: OLED65B7, OLED65C7, OLED65E7, OLED65G7, OLED65W7, OLED77G7, OLED77W7
· 2018: OLED65G8, OLED65W8, OLED77C8, OLED77W8
· Up to Sept 2019: OLED65W9, OLED77B9, OLED77C9, OLED77W9
There may also be issues with the motherboard, T-Con board or inverter board. The issues with these components usually related back to a malfunctioning power board. If there is a surge of power from the power board to any of the other components in the TV, the delicate circuits can be damaged.
The motherboard is the main board within the TV that allows all components to work together. Damage to this board will likely cause your TV to shut down and you won’t be able to turn it back on.
The T-Con and inverter boards are directly related to the TV screen. The T-Con board stands for ‘timing control board’, which orchestrates the timing of when the pixels turn on and off.
The inverter board powers the backlight behind the screen. Malfunctions of these two circuit boards will cause issues with the screen, but the TV will likely still turn on.
Unfortunately once a circuit board is broken, you will need a replacement to fix your TV. However, if it is a removable part of the circuit board, such as the capacitors mentioned above, you might be able to replace that small part.
Keep in mind that opening the back of your TV will void your TVs warrant. TVs also tend to hold residual charge within the circuits, so touching the boards can potentially be dangerous. You are always safer contacting LG or hiring a qualified technician to take a look.
LG TV Blinking Red Light
A red blinking light is the most common light used for the errors listed above. Most TVs will display a solid red light when the TV is turned off but receiving power.
LG TV Blinking Green Light
A solid green light is normally used to indicate that the TV is on. However, some models will use a green flashing light instead of a red flashing light to indicate there is a serious issue with your TV.
LG TV Blinking Blue Light
Some LG TVs have a blue light that will flash normally when the TV is powering on. If the TV does not turn on and the blue light continues to flash, this means that the TV is still attempting to turn on, but is unable to.
In this instance, you may have an issue with the power supply. You should try plugging the TV directly into the wall or into a different power outlet. Often this blue light will turn into a flashing red light to indicate there is an internal issue with the TV.
LG TV Blinking White Light
The white light on LG TVs is more common with newer models to indicate that the TV is switched on. This is interchangeable with the green light used on other models. For any flashing light on your TV, whether it is red, green, blue or white, you should refer to the solutions detailed above.