You have one LG TV which works normally except that the the screen is black and you only have sound? This is a fairly common problem that can have many 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 your LG TV connections
The first thing you need to do is to check your LG TV connections . A cable can incorrectly connected, defective or incompatible with your TV . Here are the steps to follow:
- Disconnect all peripherals connected to your LG TV Such as DVD player , internet box , game console etc.
- Disconnect it power supply cord from your LG TV and wait a few minutes.
- Reconnect the power cord and turn on the LG TV.
- If the screen remains black, try changing the source by pressing the Source or Input button on your remote. Select the TV or Antenna option and see if the picture appears.
- If the screen turns on, reconnect the disconnected peripherals one by one and check each time if the image remains stable.
- If the screen goes black again, the device you just connected is the cause of the problem. It should then be replaced or repaired.
Reset your LG TV
If checking connections the problem is not solved, you can try to reset your LG TV. This will restore factory settings and fix any software bugs. Here’s how to do it:
- Turn off the LG TV and power supply cord .
- press and hold Power the On/Off button on your LG TV
- Reconnect it 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 screen of your LG TV
If the previous two solutions didn’t work, it’s possible that the problem is coming from your LG TV’s motherboard or LCD panel. These are essential enabling ingredients the image that will appear on the screen . If one of them is rubbish should be replaced.
To find out if it is the motherboard or the LCD screen this is the reason, you can do a simple test:
- Turn on the LG TV and put it on standby pressing it Power button or On/Off the remote control.
- take one lens and light up your LG TV screen with it.
- Look carefully if you see images or menus appearing on the screen.
- If you see something, it’s because it LCD screen is functional and the motherboard is faulty. Then you should have it changed by a professional.
- If you don’t see anything, the LCD screen it is damaged 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 can black screen display due to eye comfort mode or power saving mode . These functions can decrease the brightness or contrast of the screen to protect your eyes or save energy, but they can also make the image invisible under certain conditions. To fix the problem, you can disable these features by going to Settings → All settings → Image → Eye comfort mode or Settings → All settings → General → Energy saving function .
Check the resolution of your external device
If you use one external device such as 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 having no image. To solve the problem, you need to adjust the resolution of your external device using the options menu or by consulting its user manual. You must select a resolution that matches that of your LG TV or lower.
Replace the capacitor in your LG TV
In rarer cases, your LG TV may black screen display due to a capacitor failure . Capacitors are components that store and redistribute electrical energy to prevent voltage fluctuations. If one of them is defective it can prevent it power supply on the screen . 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 one delicate operation that requires technical skills and safety precautions. If you are not sure, it is best to call a professional.
Frequent questions
Here are some frequently asked questions on the topic:
How do I know if my warranty covers the black screen issue?
To find out if you the warranty covers the black screen problem or the bluish picture problem on an LG TV, you need to consult it warranty contract that you received when you purchased your LG TV. It indicates the terms and exclusions of the warranty, as well as the validity period . If you lose the contract, you can contact the seller or manufacturer for a copy.
How to prevent black screen problem from reoccurring?
To prevent black screen problem from happening again you need to take care of your LG TV and follow some rules:
- Do not expose your LG TV to sources of heat, moisture or dust.
- Do not leave your LG TV on for long periods of time without interruption.
- Do not use cables or devices that are not compatible with your LG TV.
- Do not push or hit your LG TV.
What are the advantages of an LG TV compared to another brand?
The 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 webOS system which allows access to many applications and online services, such as Netflix, YouTube or Amazon Prime Video .
- Design, thanks to elegant, thin and light models that fits 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 is:
- The price which can be higher than that of competitors, especially for OLED models.
- The lifetime which may be less than that of other technologies, due to the risk of marking or burning the OLED screen.
- The sound which may be less efficient than that of other brands due to lack of strength or bass from the built-in 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 size ( 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 choose Ultra HD ( 3840 x 2160 pixels ) or 8K ( 7680 x 4320 pixels ) if you want to get the most out of HD content .
How do I clean my LG TV screen?
To clean your LG TV screen you need to follow these steps:
- Turn off the LG TV and unplug it from the outlet.
- Use one soft, dry cloth to gently wipe the dust from the screen.
- If the screen is dirty or dirty, use a slightly damp cloth with a little water or a specific product for liquid crystal display the 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
One LG TV that has black screen but no sound, can be repaired by following these tips. I have to first check the connections afterward reset the LG TV and finally test the motherboard or the LCD screen . If none of these solutions work, you will need to contact LG after sales service or buy a new TV .
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