Do you have an LG TV that works normally except the screen is black and you only get sound? This is a fairly common problem that can have several causes and solutions. In this article, we'll explain how to diagnose and repair your LG TV that has a black screen but still has sound.
Check the connections on your LG TV
The first thing to do is check the connections on your LG TV . A cable may be improperly connected, faulty, or incompatible with your TV . Here are the steps to follow:
- Disconnect all devices 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 input source by pressing the Source or Input button on your remote control. Select the TV or Antenna option and see if the picture appears.
- If the screen turns on, reconnect each of the devices 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 didn't solve the problem, you can try resetting your LG TV. This will restore the factory settings and correct any software bugs. Here's how:
- Turn off your LG TV and unplug the power supply .
- and hold the 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 if it were the first time you used it.
Replace the motherboard or LCD panel of your LG TV
If the two previous solutions didn't work, the problem might be with the motherboard or the LCD panel of your LG TV. These are essential components that display the image on the screen . If one of them is damaged , it will need to be replaced.
To determine whether the motherboard or the LCD panel is the problem, you can perform a simple test:
- Turn on your LG TV and put it into standby mode by pressing the Power or On/Off button on the remote control.
- Take a flashlight and shine it on your LG TV screen.
- Look carefully to see if you see any images or menus appear on the screen.
- If you can see anything, it means the LCD panel is working and the motherboard is faulty. You will then need to have it replaced by a professional.
- If you can't see anything, the LCD panel is broken and needs replacing. 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 be displaying a black screen due to Eye Comfort Mode or Power Saving Mode . These modes can reduce screen brightness or contrast to protect your eyes or conserve energy, but they can also make the image invisible under certain conditions. To resolve this issue, you can disable 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 are using an external device such as a DVD player, internet box, or game console, its resolution may not be compatible with that of your LG TV. For example, if your external device outputs an Ultra HD signal ( 3840 x 2160 pixels ) but your LG TV only supports Full HD ( 1920 x 1080 pixels ), you may not see a picture. To resolve this, you need to adjust the resolution of your external device using its settings menu or by consulting its user manual. You must choose a resolution that matches or is lower than that of your LG TV.
Replace the capacitor in your LG TV
In rarer cases, your LG TV might display a black screen due to a faulty capacitor . Capacitors are components that store and redistribute electrical energy to prevent voltage fluctuations. If one is defective , it can the screen from receiving the power supply . To resolve the issue, 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 of yourself, it is best to call a professional.
FAQ
Here are some frequently asked questions on the subject:
How can I tell if my warranty covers the black screen issue?
To find out if your warranty covers the black screen or bluish image issue on your LG TV , you should consult the warranty agreement you received when you purchased your LG TV. It outlines the warranty terms and exclusions, as well as the validity period . If you have lost the agreement, you can contact the retailer or manufacturer to obtain a copy.
How can I prevent the 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 without interruption.
- Do not use cables or devices that are incompatible with your LG TV.
- Do not force or bump your LG TV.
What are the advantages of an LG TV compared to another brand?
The advantages of an LG TV compared to other brands are :
- Image quality, thanks to OLED technology which offers vivid colours, high contrasts and wide viewing angles.
- Connectivity , thanks to the webOS system which allows access to many online applications and services, such as Netflix, YouTube or Amazon Prime Video .
- The design , thanks to elegant , slim and lightweight models that easily integrate 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 OLED screen .
- The sound , which may be less powerful than that of other brands, due to the lack of power or bass of the integrated speakers .
How do I choose the ideal size for my LG TV?
To choose the ideal size for your LG TV , you need to consider 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 60-inch screen ( 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 fully enjoy high-definition content .
How do I clean the screen of my LG TV?
To clean your LG TV screen , 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 product specifically designed for LCD or OLED . Do not use alcohol, acetone, or ammonia, as these can damage the screen.
- Dry the screen with a soft, dry cloth without rubbing or pressing.
Conclusion
An LG TV with a black screen but sound can be repaired by following these tips. First, check the connections , then reset the LG TV , and finally test the motherboard or LCD panel . If none of these solutions work, you will need to contact LG customer service or buy a new TV .
