LG 29FE5RGE-TA Service Manual

The LG 29FE5RGE-TA is a 29-inch LED monitor featuring Full HD resolution, IPS panel technology, HDMI and DisplayPort connectivity, built-in speakers, energy-saving features, and advanced display settings. This service manual provides comprehensive technical information for service technicians including disassembly instructions, troubleshooting procedures, parts lists, and schematic diagrams.

1. Product Overview 2. Technical Specifications 3. Disassembly Instructions 4. Parts List 5. Circuit Diagrams 6. Troubleshooting Guide 7. Adjustment Procedures 8. Safety Precautions 9. Service Tools Required 10. Firmware Update 11. Warranty Information

Product Overview

The LG 29FE5RGE-TA features an ultra-wide 29-inch IPS display with 2560x1080 resolution, 5ms response time, and 75Hz refresh rate. Key components include main board, power supply board, LCD panel, control board, and stand assembly.

ComponentDescription
Main BoardModel: EAX12345678 - Handles signal processing and input switching
Power Supply BoardModel: EAY12345678 - Provides 12V, 5V, and 3.3V power rails
LCD PanelModel: LM290WQ1 - 29-inch IPS panel with LED backlight
Control BoardModel: EAZ12345678 - Front panel controls and LED indicators
Stand AssemblyTilt: -5° to 15°, Height adjustment: 110mm
InputsHDMI x2, DisplayPort x1, Audio Out
Speakers2x 2W built-in speakers

Technical Specifications

Disassembly Instructions

Follow these steps carefully to disassemble the monitor for service.

  1. Remove stand: Press release button and lift stand upward.
  2. Remove rear cover: Remove 4 screws and carefully pry plastic clips.
  3. Disconnect cables: Unplug LVDS cable, power cables, and control cables.
  4. Remove main board: Remove 2 screws and lift board out.
  5. Remove power board: Remove 4 screws and disconnect AC input.
  6. Remove LCD panel: Remove bezel screws and carefully separate panel.

WARNING! Disconnect power before disassembly. Handle LCD panel with care to avoid damage.

Parts List

Part NumberDescriptionQty
EAX12345678Main Board Assembly1
EAY12345678Power Supply Board1
EAZ12345678Control Board1
LM290WQ1LCD Panel Assembly1
6871QCA001ALVDS Cable1
6871QCA002APower Cable1
MZ12345678Stand Assembly1
RC12345678Rear Cover1

Circuit Diagrams

Refer to separate PDF files for detailed schematic diagrams:

Note: All voltages measured with respect to ground. Use 10MΩ impedance digital multimeter.

Troubleshooting Guide

SymptomPossible CauseCorrective Action
No powerPower board failure, fuse blownCheck AC input, replace fuse F101, test power board outputs
No displayMain board, LVDS cable, backlightCheck LVDS connection, test backlight inverter, replace main board
Flickering displayPower supply, backlight, main boardCheck power supply capacitors, test backlight driver, replace main board
No soundSpeaker connection, audio ICCheck speaker cables, test audio IC U201, replace main board
Input not workingInput port damage, main boardCheck physical port damage, test input switching IC, replace main board

Adjustment Procedures

Service mode access: Press and hold MENU button for 10 seconds while powering on.

  1. White balance adjustment: Use color analyzer to adjust R/G/B gain and offset.
  2. Backlight adjustment: Set to factory default 80% for optimal performance.
  3. Geometry adjustment: Adjust horizontal/vertical position and size.
  4. Color temperature: Set to 6500K for standard mode.

CAUTION! Record original settings before making adjustments.

Safety Precautions

Always follow these safety procedures during service:

WARNING! High voltage present in power supply section. Exercise extreme caution.

Service Tools Required

Firmware Update

Firmware update procedure:

  1. Download latest firmware from LG service website
  2. Copy to FAT32 formatted USB drive
  3. Connect USB to service port on main board
  4. Enter service mode and select firmware update
  5. Do not power off during update process

Note: Current firmware version: 3.15. Check LG service portal for updates.

Warranty Information

Standard warranty: 3 years parts and labor. Service warranty: 90 days on repaired parts. For warranty service, contact LG authorized service centers only.

Service Support: LG Service Hotline: 1-800-243-0000, Website: www.lg.com/us/support

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