Do you have an LG TV that works normally except that the screen is black and you only have sound? This is a fairly common problem that can have several causes and solutions. In this article, we will explain how to diagnose and repair your LG TV that has a black screen, but no sound.
Check the connections of your LG TV
The first thing to do is to check the connections of your LG TV . A cable may be incorrectly connected, defective or incompatible with your TV . Here are the steps to follow:
- Unplug all peripherals connected to your LG TV , such as the DVD player , internet box , game console , etc.
- Unplug the power supply cord from your LG TV and wait a few minutes.
- Reconnect the power supply cord and turn on your LG TV.
- If the screen remains black, try changing the source by pressing the Source or Input button on your remote control. Select the TV or Antenna option and see if the image appears.
- If the screen turns on, reconnect the peripherals you unplugged one by one and check each time if the image remains stable.
- If the screen goes black again, the device you just plugged in is the cause of the problem. It will then need to be replaced or repaired.
Reset your LG TV
If checking the connections did not resolve the problem, you can try resetting your LG TV. This will restore factory settings and fix any software bugs. Here's how to do it:
- Turn off your LG TV and power supply cord .
- Press and hold Power or On/Off button on your LG TV
- Reconnect the power supply cord and turn your LG TV back on.
- Follow the on-screen instructions to set up your LG TV as you did when you first used it.
Replace the motherboard or LCD panel of your LG TV
If the two previous solutions did not work, it is possible that the problem comes from the motherboard or the LCD panel of your LG TV. These are essential components that allow the image to be displayed on the screen . If one of them is damaged , it will need to be replaced.
To find out if it is the motherboard or the LCD panel that is the cause, you can do a simple test:
- Turn on your LG TV and put it in standby mode by pressing the Power or On/Off button the remote control.
- Take a flashlight and illuminate the screen of your LG TV with it.
- Look carefully if you see any images or menus appear on the screen.
- If you see something, it is because the LCD panel is functional and it is the motherboard which is defective. You will then have to have it changed by a professional.
- If you don't see anything, the LCD panel is broken and needs to be replaced. You can also call a professional or buy a new LG TV .
Turn off eye comfort mode or power saving mode
Your LG TV may display a black screen due to eye comfort mode or power saving mode . These modes can reduce the screen brightness or contrast to protect your eyes or save power, but they can also make the image invisible in certain conditions. To fix the issue, you can turn off these modes by going to Settings → All settings → Picture → Eye comfort mode or Settings → All settings → General → Power saving mode .
Check the resolution of your external device
If you use an external device such as a DVD player, internet box or game console, the resolution of this device may not be compatible with that of your LG TV. For example, if your external device sends a signal in Ultra HD ( 3840 x 2160 pixels ) but your LG TV only supports Full HD ( 1920 x 1080 pixels ), you risk not having an image. To resolve the issue, you need to adjust the resolution of your external device using its option menu or consulting its user manual. You must choose a resolution that matches that of your LG TV or lower.
Replace the capacitor on your LG TV
In rarer cases, your LG TV may display a black screen due to a capacitor failure . Capacitors are components that store and redistribute electrical energy to avoid voltage variations. If one of them is defective , it may prevent the power supply to the display . To fix the problem, you need to replace the faulty capacitor. This requires disassembling the LG TV and soldering a new capacitor in place of the old one. This is a delicate operation that requires technical skills and safety precautions. If you are unsure, it is best to call a professional.
FAQs
Here are some frequently asked questions on the subject:
How do I know if my warranty covers the black screen issue?
To find out if your warranty covers the black screen problem or the bluish image problem on an LG TV , you must consult the warranty contract that you received when purchasing your LG TV. It indicates the conditions and exclusions of the guarantee, as well as the period of validity . If you lost the contract, you can contact the seller or manufacturer for a copy.
How to prevent black screen problem from happening again?
To prevent the black screen problem from recurring , you must take care of your LG TV and follow a few rules:
- Do not expose your LG TV to sources of heat, humidity or dust.
- Do not leave your LG TV on for long periods of time without interruption.
- Do not use cables or devices that are incompatible with your LG TV.
- Do not force or knock your LG TV.
What are the advantages of an LG TV compared to another brand?
The advantages of an LG TV compared to another brand are :
- Image quality, thanks to OLED technology which offers vivid colors, high contrasts and wide viewing angles.
- Connectivity , thanks to the webOS system which allows access to numerous applications and online services, such as Netflix, YouTube or Amazon Prime Video .
- Design , thanks to elegant, thin and light models that fit easily into your interior.
What are the disadvantages of an LG TV compared to another brand?
The disadvantages of an LG TV compared to another brand are:
- The price , which can be higher than that of competitors, especially for OLED models.
- The lifespan , which may be shorter than that of other technologies, due to the risk of marking or burning of the OLED screen .
- The sound , which may be less efficient than that of other brands, due to the lack of power or bass from the integrated speakers .
How do I choose the ideal size for my LG TV?
To choose the ideal size for your LG TV , you must take into account two criteria:
- The distance between your LG TV and your sofa or armchair . The greater the distance, the larger the screen size should be. The general rule is to multiply the distance by 0.2 to get the size in inches. For example, if you are 3 meters from your LG TV, you should choose a size of 60 inches ( 3 x 0.2 = 0.6 x 100 = 60 ).
- The resolution of your LG TV. The higher the resolution, the sharper and more detailed the image. The standard resolution is Full HD (1920 x 1080 pixels), but you can opt for Ultra HD ( 3840 x 2160 pixels ) or 8K ( 7680 x 4320 pixels ) if you want to make the most of high definition content .
How do I clean the screen of my LG TV?
To clean the screen of your LG TV , you must follow these steps:
- Turn off your LG TV and unplug it from the mains.
- Use a soft, dry cloth to gently wipe the dust off the screen.
- If the screen is stained or dirty, use a slightly damp cloth with a little water or a specific product for LCD or OLED . Do not use alcohol, acetone or ammonia which may damage the screen.
- Dry the screen with a soft, dry cloth without rubbing or pressing.
Conclusion
An LG TV that has a black screen, but no sound, can be repaired by following these tips. You must first check the connections , then reset the LG TV , and finally test the motherboard or the LCD panel . If none of these solutions work, you will need to contact LG after-sales service or purchase a new TV .
