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LG Cloud Device
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71804621 (2203-REV00)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2022 LG Electronics Inc. All rights reserved. Only training and service purposes.
LM22G
24CQ650N
24CQ651N
24CQ650W
24CQ651W
24CQ650N-6N
24CQ651N-6N
24CQ650W-AC/ AP
24CQ651W-BP/ BR
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Table of Contents
Related Manuals for LG 24CQ651W-BP
Summarization of Contents
Safety Precautions
Important Safety Notice
Essential safety parts must be replaced with specified components to prevent shock, fire, or other hazards.
General Guidance for Servicing
Use isolation transformer, replace fuses correctly, and keep wires away from high-voltage or hot parts.
AC Leakage Current Checks
Perform cold and hot checks on exposed metallic parts to ensure safety from electrical shock before returning to customer.
Specifications
General Specifications
Details on brand, model name, region, features, chassis, inputs, sound, power, and accessories.
Engineering Specifications
Technical details including operating frequency, resolution, and power input voltage for engineering purposes.
Signal Timing and Video Input
Detailed signal timing parameters for HDMI and lists supported video input modes and resolutions.
Troubleshooting Guide
No Power On Troubleshooting
Steps to diagnose and resolve no power issues, including checking cold-boot power sequence and voltage levels.
No Screen On Troubleshooting
Troubleshooting steps for when the screen remains blank or does not turn on, checking backlight and driver output.
No Video - HDMI Troubleshooting
Steps to diagnose and fix issues related to no video signal via HDMI, checking connection, cable, and I2C signal.
Disassemble Guide
Stand and Back Cover Disassembly
Procedures for removing the stand and back cover to access internal components safely.
Internal Component Removal
Steps for removing specific internal modules like webcam, speaker, and RF shield.
Board and Module Replacement
Guidance on removing and replacing main boards, memory modules, and SSDs.
Software Update Procedures
BIOS Version Check and Upgrade
How to check the current BIOS version and perform an upgrade using provided flash files.
DMI String Update
Instructions for updating the DMI string, including serial number, product name, and UUID.
Windows Image Installation
Detailed steps to install the Windows OS image onto the device via USB boot.
Firmware Update
Procedure for checking the firmware version and updating it using HDMI JIG and USB connection.
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