Do you have a dark spot on your LED TV screen? Rest assured, this problem is common and can occur on Samsung, LG, Sony, Philips, Vizio, and other TVs. But what causes this dark spot on the LED TV screen? Is it possible to repair your screen in this case? Discover in this article the different options that will allow you to correct this problem of black spots on an LED TV screen.
Why is there a black spot on an LED TV screen?
LED (and LCD) screens can become smudged for a variety of reasons. It's important to know that this problem can occur on TVs made by Samsung, LG, Philips, and others.
The primary cause of a black spot on an LED TV screen is called "burn-in." This occurs when an image is displayed for an extended period of time. Burn-in is a traditional defect of older tube and plasma TVs. When an image remains on the screen for a long time, it is burned into the glass.
This is a common sight at ATMs, which display the same image all day long. This type of shadow isn't necessarily a defect, but a consequence of screen use. In fact, the phosphor particles in plasma TVs can lose their ability to reproduce light and become static. Depending on the severity of this type of stain, it may be possible to remove it from the screens. To do this, follow these steps:
- Brightness settings: Reduce the TV's brightness and contrast and watch a variety of content; it may disappear on its own.
- Pixel Shift: Most modern TVs have a built-in pixel shift or screen shift feature, which constantly shifts images by slightly altering pixel usage. If this feature isn't automatically enabled, you can enable it in the settings. Some settings offer "refresh" functions that you can run manually to try to clean up image retention issues.
- Play a colorful video: If the above options don't work, play a fast-moving video with multiple color changes lasting a few minutes to 30 minutes.
The second reason is more serious, and it is a defect. We will see below.
Black spot on an LED TV screen: backlight failure
When you have a large black spot on an LED TV screen, the problem is likely due to a backlight failure. Backlighting, as its name suggests, is a collection of small light points located on the screen that is part of the image generation process.
When one or more of these LED lights go out, what you'll see is a dark spot on the screen. Actually, as we now know, it's not a spot. It's a part of the screen that isn't backlit. And therefore, it's dark.
Furthermore, there is a simple test to determine whether the dark shadow on the screen is a backlight defect or not. To do this, look closely at the area where the spot is located and see if you can see the image. It may be necessary to turn off the lights in the room for this. If you experience difficulties, contact a competent service .
You can also read: What to do if your laptop motherboard is damaged?
Is a black spot on an LED TV screen corrected?
The good news is that you can fix a black spot on an LED TV screen. This is possible thanks to the tips mentioned below. However, there is also bad news: not all TVs can be repaired, or the cost can become prohibitive.
Another solution is just as simple: simply turn all the LEDs back on. The repair can be done by gluing the detached LED lens back on or replacing the component if it is burnt out.
There are many videos online showing how to repair LED TV backlights. While it may seem simple, it's not advisable to do it at home, even if you're an expert in the art of electronics repair . Instead, contact a qualified repair service .
However, on some LED screens, the backlights are part of the display assembly. In other words, they cannot be replaced, and in this case, only a new screen will do the trick.
If this is the case, we're sorry. So, it's best to buy another TV. But why do dark spots appear on the LED TV screen? It's easy to understand when you see how an LED screen works.
Understanding how LED screens work
To understand how a backlight fault causes a black spot on an LED TV screen, let's look at a very simplified explanation of how an LED screen works.
The LCD/LED screen is made up of several layers. That's why it needs additional light. It's this extra glow that accentuates its colors and highlights the differences between light and dark. This set of lights that allows us to see images in pixels is called a backlight.
There are two types of backlighting used by Samsung , LG , Sony , Philips and other LED TVs. Each has its specific application, depending on the type of TV, the number of inches, etc. The edge is illuminated when the LEDs are placed on the sides of the screen. This allows the creation of thinner TVs with less power consumption.
Locally dimmable screens are equipped with LED lamps throughout, which can be individually controlled. This arrangement of lights makes the image on this type of screen better than that of edge-lit screens. It's now easier to understand why a black spot appears on an LED TV screen. A black spot means that these small points of light are burned out or losing their brightness.
Edge-lit screens are also easier to repair because the LED strip is replaceable on some models. However, on TVs with local dimming, the backlight often cannot be replaced. This is because it is part of the screen's structure. In other words, the screen (with all its layers) is a single unit and cannot be disassembled. Therefore, in most cases, the solution to a black spot on an LED TV screen is to replace the entire screen.
Conclusion
This black spot on an LED TV screen can occur on Samsung, LG, Sony, Philips, Vizio, and other TVs. Also, dark spots on the TV screen can be caused by "burn-in." Especially when an image is displayed for an extended period of time.
In the case of LCD and LED TVs, the problem is likely due to a backlight failure. Depending on the type of TV, it may be possible to repair it, but in others, the entire screen is a single unit and cannot be disassembled for repair.
Furthermore, to benefit from any assistance related to the repair of your TV, Le Dépôt Electronique is available . We are located at 3335 rue jean talon est. Montreal QC, H2A 1W6 Canada. Our premises are open Monday to Friday from 10:00 a.m. to 7:00 p.m., Saturday from 10:00 a.m. to 5:00 p.m. and Sunday from 10:00 a.m. to 5:00 p.m.
