The reasons for bright spots on LED TV screen
Loose reflector
The reflector is able to distribute the concentrated light evenly on the screen. Therefore, when the reflector of the LED TV screen is loose, the light will be concentrated at a certain point of the screen, forming bright spots.
Usually, there are two factors that can cause the reflector to loosen, one is internal: the quality of the LED TV screen or the heat generated internally; the other is external: the LED TV screen is hit by people or objects.
Bleeding color of backlight
The phenomenon that the edges of the LED TV screen appear fuzzy gray or white areas with several small white dots distributed on the screen is known as backlight bleed. There are three reasons for this phenomenon: improper assembly, production defects or physical damage to the LED TV screen.
Bad Dots
Usually on LED TV screen, the bright dots appear as small circles and are white, black or gray, which is known as bad dots. It occurs when the cables inside the LED TV screen are loosely connected.
No Input or Viewing Very Dark Scenes
When there is no input or watching a very dark scene, LED TV screen appears uneven distribution of bright spots. This is a normal phenomenon and can be adjusted by the system to reduce the brightness of the screen.
How can I fix the bright spots on my LED TV screen?
Repair the loose reflector
Gather the necessary items
Before repairing the reflector, collect the necessary items to be used in the repair, the following are the tools you need to prepare in advance:
- A set of screwdriver tools
- Safety gloves
- Magnetizer or demagnetizer
- Prying tool
- Cotton swabs
- Strong adhesive
Repair Steps
Foremost, we have to turn off the LED TV screen and cut off the power supply, cool it down for half an hour so that its capacitor can consume the remaining power to prevent electrocution when repairing.
Then place the LED TV screen face down on a soft fabric that can hold it, such as a bed sheet, thick comforter, etc. The purpose is to protect the LED TV screen. The purpose is to protect the LED TV screen from collision damage.
Next, use a suitable screwdriver to turn down all the screws on the back of the LED TV screen. In this process, we can use a magnetizer or demagnetizer to make the disassembly process easier. And in order to facilitate the subsequent installation, we need to mark the different screws and screw holes.
After unscrewing all the screws, remove the back cover of the LED TV screen. This process will be a bit tough, we can use a pry bar to slightly lift the edge of the back cover of the LED TV screen, and then use our fingers to gradually widen the gap between the body and the back cover, so that the two can be perfectly separated.
Next, we flip the LED TV screen over so that the screen faces the ceiling, remove and mark the screws around the edge of the screen, pry up the frame with a pry bar, disconnect the cables connected to the screen, and place the complete screen on a clean and flat surface.
After removing the screen, we can see the white surface inside the LED TV screen, that is the diffuser plate, the component that is mounted in front of the reflector. For this reason, we have to remove the diffuser plate and label both sides of the soft cover in case we place the diffuser plate incorrectly during the installation, which will prevent the LED TV screen from displaying properly.
Underneath the diffuser plate is the reflector, which has a square-like object that is the object we need to deal with: the reflector. We will dip a cotton swab in glue and apply it to the place where the reflector is loose or falling off, it should be noted that it is not advisable to apply too much glue, too much glue will affect the reflector.
After making sure that the reflector is stable, put all the components back in place and fix them in a specific order, which is diffuser, screen, and cover. When installing the screen, the cables should be connected first, and then the screws should be screwed in, this process needs to be careful to prevent damage to the screen.
Finally, after all the components are installed, plug in the power supply, turn on and test the LED TV screen.
Ways to fix backlight color bleeding
Use full-screen dark image: Watching some scenes with dim image screen or black screen can bring out the light spots and better take the following fixes to the LED TV screen’s display screen.
Adjust image settings: In the settings of LED TV screen, find the setting options about brightness and contrast, turn down the brightness and contrast, you can minimize the effect of backlight bleed on the display effect.
Enable local dimming: In modern times, there are a lot of LED TV screen with local dimming function, which can adjust the brightness of a specific area, can enhance the black level of the display image and reduce the backlight bleed.
Adjusting the position of the TV set: when the placement of the LED TV screen is not correct, it will make the light uneven, which will increase the backlight bleed. The placement of the LED TV screen should be constantly adjusted to reduce the bright spots on the screen.
Solution for bad dots
Turn the LED TV screen off and unplug the power cord from the socket, wait 30 seconds, then plug it back in and turn on the LED TV screen.
If the white dot problem cannot be solved, then the problem it creates is the internal connection of the LED TV screen, whose repair process is very complex and flexible, and you need to seek the help of a professional repair person.
No input or watching very dark scenes of the solution
The bright spots on the screen can be eliminated through software system adjustments. First, in the menu bar of the image settings, lower the backlight level and set the image mode to standard.
Then on the Settings menu bar, turn the light sensor on. Finally, turn the power saving mode on and adjust it to your needs. If some settings are not presented on the LED TV screen, then consult its instruction manual and follow the instructions.
Frequently Asked Questions
Does LED screen have bright spot problem like LED TV screen? How can I fix it?
Yes, LED screen will have bright spot problem, but its solution is not as complicated as LED TV screen, just need to replace the LED module in the bright spot area with the same batch of LED module, then you will be able to solve the bright spot problem.
What should I do if there are marks on my LED TV screen?
We can clean the LED TV screen. Prepare the cleaning cloth and cleaner, spray the cleaner on the cleaning cloth, wipe in the form of drawing circle, and then dry the screen with a dry cloth, then you can eliminate the LED TV screen traces.
What to do if the LED TV screen bright spot problem is generated by burn-in or panel damage?
Whether it is screen burn-in or panel damage, they both require in-depth repair of the LED TV screen, whose repair process is very complicated and requires a certain level of technical experience and expertise to repair. Therefore, it is recommended that you seek the help of a professional repairer directly.
Conclusion
In conclusion, the bright spots of LED TV screen can be generated by various factors, if you want to eliminate or reduce the effects of the bright spots by yourself, then you can refer to the above mentioned actions.
