Tivi LG43UK6540 bị sáng trắng màn hình, xử lý bằng hai cách

PHƯỚC TÀI TV

4 Jan 202317:53

Summary

TLDRThis video tutorial showcases the repair process of an LG 43UK6540 TV with a screen display issue. The host begins by examining the TV's internal components, focusing on the power board and the mainboard. After identifying the problem, they demonstrate two methods to fix the screen's white display issue: using tape to cover specific areas on the board and desoldering certain components. The video concludes with a successful repair, restoring the TV's normal display, and encouraging viewers to subscribe and like for support.

Takeaways

📺 The video is about repairing an LG TV model 43UK6540 with a screen issue.
🔍 The TV's problem is a white screen with white edges instead of the usual black screen when turned on.
👨‍🔧 The repair process involves opening the TV to check if it can still be processed.
🔌 The internal structure of the TV is introduced, including the power board and the mainboard.
🎚️ The TV is a 4K model, and the issue might be related to the screen's high processing capabilities.
🔩 The repairer checks the connections and cables, focusing on the white and red cables.
🖥️ After disconnecting certain cables, the screen shows different colors, indicating a possible fault in the connections.
🛠️ The repair involves using tape to cover a specific area on the mainboard, near 'V GL2'.
🔄 A second method of repair is introduced, which involves disconnecting a row of resistors.
📈 The video concludes with a demonstration of the TV working properly after the repairs, with clear images and no screen distortion.

Q & A

What is the model of the LG TV mentioned in the video?
-The model of the LG TV is 43UK6540.
What is the issue the LG TV is facing?
-The LG TV is experiencing a white screen issue upon startup.
How does the technician identify that the TV screen has a problem?
-The technician observes that the screen turns completely white instead of black, which is unusual for faulty TVs.
What kind of display technology is the TV using?
-The TV uses a 4K display panel.
What steps does the technician take to diagnose the TV’s issue?
-The technician opens the TV, checks the cables, and starts by disconnecting and reconnecting different cables to see if the issue resolves.
What happens when the technician disconnects one of the cables?
-When the technician disconnects one of the cables, half of the screen turns black, indicating a possible issue with the cable or its connection.
What solution does the technician propose after diagnosing the problem?
-The technician uses adhesive tape to cover specific sections of the cable connections, which prevents the white screen from appearing.
Why is it important for the technician to ensure the cable does not touch the chassis?
-If the cable touches the chassis, it could damage the screen or the TV's mainboard, which is dangerous.
What alternative solution does the technician offer if the issue persists?
-The technician suggests cutting a row of resistors on the board as another method to fix the problem.
What is the final result after the technician applies the fixes?
-After applying the fixes, the TV displays clear and stable images without flickering, lines, or white screens.

Outlines

00:00

📺 Repairing an LG TV with Screen Issues

The script describes the process of repairing an LG television model 43UK6540 with a screen display issue. The TV exhibits a white screen with white edges instead of the usual black screen when turned on. The repairer introduces the internal components, focusing on the power board and the main board. They proceed to disconnect cables to check if the TV can still process signals. After disconnecting the cables, they test the TV with power to see if there's any change. The screen remains white, indicating a screen error. They then discuss the process of opening the TV and checking the connections, discovering that half the screen turns black when certain cables are disconnected, suggesting a problem with the cable or connection rather than the screen itself.

05:01

🔍 Diagnosing and Fixing the TV Screen

The script continues with the repair process, where the technician removes a red cable and successfully restores the TV's image display. They note that the image is stable without any flickering or distortion. The repairer then explains the importance of handling the cables carefully to avoid damaging the screen or the board. They proceed to cover a specific area on the main board with tape, which seems to resolve the screen issue. The repairer emphasizes the need to be cautious when testing and handling the cables and components, as improper handling can lead to further damage.

10:10

🛠️ Advanced Troubleshooting of the TV

In this part of the script, the repairer addresses a more complex issue with the TV by cutting a row of resistors on the main board. They carefully remove the tape covering a specific area and directly work on the board. The repairer demonstrates that after removing six resistors and leaving the seventh one intact, the TV functions normally. They also caution viewers not to mishandle the white cable tabs, as this could cause damage. The repairer concludes by testing the TV and confirming that the image is clear, without any distortion or flickering, and the screen issue is resolved.

15:10

🎥 Conclusion of the TV Repair Video

The script concludes with the repairer sharing the final results of their work. They have successfully resolved the screen issue, and the TV now displays a clear and crisp image without any flickering, distortion, or ghosting. The repairer thanks the viewers for watching the video and encourages them to subscribe to the channel and like the video if they found it helpful. They also remind viewers of the importance of their shared enthusiasm and passion for electronics, and they express gratitude for the viewers' support.

Mindmap

Keywords

💡TV

TV refers to 'television,' which is an electronic device that receives and displays visual and audio signals. In the video, the TV is the subject of the repair process. The script mentions a specific TV model from the LG brand, indicating the focus is on a particular type of TV set.

💡LG

LG is a well-known electronics brand. The script mentions an LG TV model, suggesting that the video is about troubleshooting and repairing a TV from this manufacturer.

💡Model

In the context of the video, 'model' refers to the specific type or design of the TV, which is '43UK6540'. This is important as it helps identify the exact device being discussed and repaired.

💡Screen

The 'screen' is the display surface of the TV where images and videos are shown. The script describes a problem with the screen displaying a white color instead of the usual black, indicating a malfunction.

💡Fault

A 'fault' in the video refers to the malfunction or error in the TV's operation. The script describes a fault where the screen appears white instead of displaying a proper image.

💡4K

4K refers to a resolution of 3840 x 2160 pixels, which is a high-definition display standard. The video mentions that the TV is a 4K model, emphasizing the high resolution and quality expected from the device.

💡Tab

In the script, 'Tab' likely refers to a component or part of the TV that needs to be accessed for repair. The mention of 'Tab' suggests that the repair process involves opening the TV and working with its internal components.

💡Cable

Cables are used to connect different parts of the TV for power and data transmission. The script describes disconnecting and reconnecting cables as part of the troubleshooting process to identify and fix the issue.

💡White Screen

A 'white screen' is a common issue where the TV's display only shows a white color without any image. The video's theme revolves around fixing this issue, making it a central concept.

💡Repair

Repair in this context refers to the process of fixing the TV's fault. The video provides a step-by-step guide on how to repair the TV, making 'repair' a key action and concept.

💡Test

Testing in the video involves checking the TV's functionality at various stages of the repair process. The script mentions testing after disconnecting cables to see if the TV can still process signals, which is a diagnostic method.

💡Tape

Tape in this context could refer to a method used in the repair process, possibly to fix a connection or cover a part. The script mentions using tape as part of the troubleshooting steps.

Highlights

Introduction to repairing an LG TV model 43UK6540 with a screen issue.

The TV has a white screen with a white border instead of the usual black screen.

The TV model is a high-definition 4K model.

Upon turning on the TV, it displays a bright white screen.

The TV does not show any image when the screen is bright white.

The repair process involves opening the TV to check if it can still process signals.

Introduction to the internal structure of the TV, including the power board.

The TV's mainboard is located at the back, connected to the screen.

The TV uses a 4K panel with 38 tabs on one side.

The repair will focus on the cables rather than the power board or mainboard.

The repairer connects the TV to electricity to test if it can still process signals.

After removing certain cables, the screen displays a white image.

The repairer tests the TV by removing and reconnecting cables to identify the issue.

The screen shows a different image when certain cables are disconnected.

The repairer discovers that one half of the screen is white and the other half is black when specific cables are removed.

The repair process involves reattaching cables and testing the TV.

After reattaching the cables, the TV screen displays a normal image without flickering or jumping.

The repairer shares a simple test method to identify the issue with the TV.

A damaged tab is covered with adhesive tape as a temporary fix.

The repairer demonstrates how to avoid damaging the screen by handling the cables carefully.

The repairer shows the correct way to reattach the cables to avoid damaging the TV.

After the repair, the TV screen looks beautiful and clear without any lines or distortion.

The repairer shares the exact location where the adhesive tape was applied as part of the repair.

The repairer demonstrates a second method of repair by removing a row of resistors.

After the second method of repair, the TV image looks clear and detailed.

The repairer emphasizes the importance of not mixing up the white cable tabs during reassembly.

The final result of the repair is a TV with a clear and undistorted image.

The video concludes with a call to action for viewers to subscribe and like the video if they found it helpful.