How to Fix a Backlight on a TV

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Updated June 27, 2022

Have you ever experienced your LED or LCD TV showing a black screen when turned on, even when there’s audio in the background? Well, this is a common problem with low-end LED/LCD TVs in the market but you are unlikely to find it in the best TVs . What you might not know is a cheap replaceable component often causes this frustrating problem.

KEY TAKEAWAYS:

  • Backlight issues can occur due to several reasons, including water and drop damage.
  • TVs function by letting a filtered light system at the back of the display develop images that are displayed on a screen.
  • Before replacing the bad LED, ensure the replacement LED has the same values as the bad one.

Fortunately, TV owners don’t need any technical knowledge on how to fix a backlight on a TV. As a result, we’ve outlined a simple process on how to repair a faulty backlight on a TV at home.

What causes TV Backlight Issues?

Backlight issues can occur due to several reasons, including water and drop damage. Sometimes, it can be the result of a defective component. You may also experience it when you are fixing plasma tv burn.

Your Television functions by letting a filtered light system at the back of the display develop images that are displayed on a screen. Unfortunately, when the backlight is faulty or gets damaged, filtered light will not be projected on display, and the user won’t be able to view images on the screen.

Before replacing the faulty backlight, it is essential to diagnose the root cause of the problem. Backlight failure is widespread. The easiest way to check is to power the screen and put a flashlight as close as possible to find out if you can view the image.

The image needs to be dark, like when your screen’s brightness is set to the lowest point. Once you are sure the image is fine, you can proceed to replace the TV backlight.

Fixing Faulty Backlight on a TV

Replacing a faulty TV backlight is pretty straightforward. All you need is a screwdriver, LED flexible strips, wires, and soldering iron. There are two ways you could fix a faulty TV backlight:

  • Replacing the entire LED strip.
  • Changing a single LED.

STEP 1

First, unscrew all the screws from the back of your TV. Depending on your TV model, it should have between 15 and 20 screws. You can look at some of the common television repair parts if you do not know how to do this. Next, carefully lift the TV back panel. Finally, unscrew any metal sheeting to reveal its internals.

STEP 2

Turn the TV around and remove the frontal housing and the LED panel. When disassembling the LED panel, be extremely careful. This component is fragile.

STEP 3

Now that the panel is removed take out the bezel that holds the backlight diffuser to get access to the backlight.

STEP 4

Check all the LEDs and identify the faulty ones. After identifying the bad LED remove it from the LED strip and replace it with a new one.

STEP 5

It is essential to note that before you replace the bad LED with a new one, ensure the replacement LED has the same values as the bad one. If the replacement LED has different values, it might not work or fail to work after some time. Check the replacement LED voltage and amperage before swapping them out.

STEP 6

Once you have replaced the faulty LED, fasten the LED strip on display and reassemble the TV by screwing it back to place. Congratulations! You have successfully repaired your TV’s backlight problem.

F.A.Q.S

What is a TV backlight problem?

This is a common problem with low-end LED/LCD TVs in the market. The LED or LCD TV will show a black screen when turned on, even when there’s audio in the background.


Is it possible to fix a TV backlight issue at home?

Yes. Replacing a faulty TV backlight is pretty straightforward. All you need is a screwdriver, LED flexible strips, wires, and soldering iron.


How do you check for a faulty backlight problem on a TV?

Backlight failure is widespread. The easiest way to check is to power the screen and put a flashlight as close as possible to check if you can see the image through.


Are TV backlights replaceable?

Yes. However, it is essential to note that before replacing the bad LED, ensure the replacement LED has the same values as the bad one.

What causes a TV backlight issue?

Backlight issues can occur due to several reasons, including water and drop damage. Sometimes, it can be the result of a defective component.



STAT: Despite the growing popularity of alternative consumer electronics in the U.S like the Smartphone, the Television market has continued to grow. It is estimated that the global number of household TVs will reach the 1.8 billion mark by 2025 (source)

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