To Next PageTo Next PageWhat to do if my LG 55UM7450PVA LED TV picture is broken or freezing?
If your LG LED TV shows a broken or freezing picture, there are several things you can check. First, check the RF signal level and the RF cable connection. Also, verify if other equipment might be causing the problem. You can also try a software upgrade. If the issue persists, consider replacing the Main Board or contacting your signal distributor or broadcaster.
How to fix an LG LED TV with no video but normal audio?
If your LG LED TV has no video but normal audio, make sure all cables between boards are properly inserted. Check the backlight and the Power Board 13.2V output. If the issue continues, you may need to repair the Power Board or its parts, or replace the T-con/Main Board.
What to do if LG 55UM7450PVA has no video and no audio?
If your LG LED TV has no video and no audio, check and replace the Power Board.
Why does my LG LED TV have a color error?
If your LG LED TV displays a color error, start by checking the color by input. If the problem persists, you may need to replace the Main Board or the module. It's also advisable to request a repair for any external device or cable that might be causing the issue.
Essential safety parts must be replaced with recommended components to prevent hazards.
General advice for servicing, including using isolation transformers and handling components.
Procedures for performing cold and hot AC leakage current checks.
General advice for safe servicing procedures, including unplugging power and using test equipment.
Precautions to prevent damage to ES devices from static electricity.
Guidelines for proper soldering techniques and equipment.
Steps for replacing various components like ICs, transistors, diodes, and fuses.
Methods to repair damaged copper traces on circuit boards using jumper wires.
Defines the TV models and chassis this specification applies to.
Conditions and methods for testing parts and the receiver.
Details general specifications for market, broadcasting, inputs, and outputs.
Lists supported resolutions, frequencies, and pixel clocks for various inputs.
Step-by-step guide to update TV software using a USB drive.
Guide to updating TV software via network connection (NSU).
Illustrates the main System-on-Chip and its interconnections with other components.
Shows the EPI/CDES interface between the Main SoC and display panels.
Details the Vx1 interface for display connection, including signals and pinouts.
Illustrates the tuner module's connection to the Main SoC and associated signals.
Shows connections for video and audio signals, including AV, component, and headphone outputs.
Depicts the HDMI 2.0 interface, including connections for multiple HDMI ports.
Illustrates connections for USB, Wi-Fi, M-Remote, and UART debug interfaces.
Shows the I2C communication map between the Main SoC and various peripherals.
Details the General Purpose Input/Output pins of the Main SoC and their connections.
Illustrates the General Purpose Input/Output pins of the MICOM and their connections.
Visual breakdown of the TV set's main components and their assembly.
Visual breakdown of the TV module components and their arrangement.
Step-by-step instructions for disassembling and assembling the back cover of the TV.
Guide for disassembling module parts including case top, guide panel, and LED array.
Guides for diagnosing and resolving video-related issues.
Guides for diagnosing and resolving power-related issues.
Guides for diagnosing and resolving audio-related issues.
Guides for diagnosing and resolving function-related issues.
Guides for diagnosing and resolving noise and exterior defect issues.
Procedure to check the LCD backlight by visual inspection.
Steps to check and adjust the white balance settings for color accuracy.
Method for checking tuner input signal strength for video lag or stop issues.
Procedure to check the TV's software version for video error diagnosis.
Guide for checking the tuner component for video errors.
Steps to check and reconnect the EPI link cable for color errors.
Procedure to check the TV's front power indicator status.
Steps to check power input voltage and ST-BY voltage on the power board.
Method for checking power off modes and status entries.
Guide to checking audio settings within the TV menu.
Procedure to check voltages and speaker connections for audio issues.
Steps to check IR & EYE sensor and remote control operation.
Guide for checking Wi-Fi and Bluetooth module operation.
Instructions on how to access service menus using the remote control.
Details functions accessed via specific remote control buttons like B-TOOTH, IN-START, ADJ.
Procedures after main board replacement, including model number and white balance checks.
Examples of image-related symptoms and their causes, focusing on cable issues.
Examples of symptoms related to the main board, like noise or picture issues.
Examples of symptoms related to the TV module, like bars or internal matter.
Examples of symptoms specifically related to the T-CON board.
Overview of the Smart JIG for power diagnosis.
Diagram showing connections for various power board models to the Smart JIG.
List of supported OLED and LED models for the Power Board JIG.
Instructions on how to connect the Power Board JIG to the Smart JIG.
Guide for setting the correct voltage on the Smart Jig for power diagnosis.
First part of the diagnostic method for 15Y OLED power boards.
Diagnostic procedure for 16Y OLED(B6) power boards.
Diagnostic procedure for 16Y OLED(C6) power boards.
Diagnostic procedure for 16Y OLED(E6) power boards.
Diagnostic procedure for 16Y OLED(G6) power boards.
Diagnostic procedure for 17Y OLED(B7/C7/E7/G7) power boards.
Diagnostic procedure for 17Y OLED(W7) power boards.
Diagnostic procedure for 16Y/17Y LED 18Pin power boards.
Diagnostic procedure for 16Y LED(UH95/UH96) power boards.
Diagnostic procedure for 16Y/17Y LED(UH85/UH93) power boards.
Diagnostic procedure for 16Y/17Y LED 12Pin power boards.
Diagnostic procedure for 16Y LED 12Pin power boards.
Diagnostic procedure for 17Y LED 28Pin power boards.
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