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LG 34UC87 - User Manual

LG 34UC87
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www.lg.com
IPS LED MONITOR
LED MONITOR
OWNER'S MANUAL
Please read the safety information carefully
before using the product.
34UC87

Table of Contents

Questions and Answers

  • S
    Sarah Guerrero PhDJul 27, 2025
    What to do if nothing is displayed on my LG 34UC87 screen?
    • C
      Craig BenderJul 27, 2025
      If nothing is displayed on your LG Monitor screen, try the following: - Ensure the power cord is correctly plugged into the power outlet. - Verify the power cable connection and press the power button. - Check that the connected input is enabled via Menu - Input. - If the monitor is in power-saving mode, move the mouse or press any key on the keyboard. - Confirm that the computer is turned on. - If the signals from the PC are out of the monitor's frequency range, check the Product Specification section of this manual to set the appropriate frequency. - Check the signal cable between the PC and monitor, reconnecting if necessary. - If you are using a Mac product, DisplayPort 1.2 may not be supported, please contact the manufacturer.
  • C
    Christopher BeckJul 31, 2025
    How to fix no sound from the headphone port on LG Monitor?
    • T
      Trevor GloverJul 31, 2025
      If there is no sound from the headphone port on your LG Monitor, ensure the headphone port connections are properly made. Also, try increasing the volume using the joystick. Lastly, set the audio output of the PC to the monitor you are using by going to Control Panel > Hardware and Sound > Sound and setting the monitor as the default device.
  • V
    valenciafrankAug 6, 2025
    What to do if LG 34UC87 screen display is unstable and shaky?
    • E
      Emma MendozaAug 6, 2025
      If your LG Monitor's screen display is unstable and shaky, and images leave shadow trails, it might be due to the resolution being set to HDMI 1080i 60/50 Hz (interlaced). Try changing the resolution to 1080P or the recommended resolution.
  • C
    Christine SnyderAug 11, 2025
    Why is the display color abnormal on my LG 34UC87 Monitor?
    • Y
      youngkarenAug 11, 2025
      If the display color is abnormal on your LG Monitor, you can try the following solutions: - Set the color to 24 bit (true color) or higher via Control Panel > Display > Settings > Color Quality. - Check if the signal cable is properly connected; reconnect the cable or reinsert the PC's video card. - Note that pixilated spots (red, green, blue, white, or black) may appear, which is normal for an LCD screen and not related to performance.
  • B
    bowmandebraAug 16, 2025
    Why does my LG Monitor screen retain an image?
    • M
      Mrs. Stephanie Williams DVMAug 16, 2025
      Displaying a still image for a prolonged time may cause damage to the screen of your LG Monitor, resulting in image retention. To extend the monitor's lifespan, use a screensaver.
  • J
    Jared MillerAug 20, 2025
    How to turn off OSD Lock message on LG Monitor?
    • J
      Jason SmithAug 20, 2025
      To turn off the OSD Lock message on your LG Monitor, navigate to Menu > Settings and set OSD Lock to Off.

Summary

ASSEMBLING AND PREPARING

Product Composition

Check whether all the components are included in the box before using the product. Contact the retailer if any components are missing.

Product and Button Description

How to Use the Joystick Button

Instructions on how to operate the monitor's joystick button for basic functions like power and volume.

Input Connector

Moving and Lifting the Monitor

Installing the Monitor

Assembling the Stand

Step-by-step guide to assemble the monitor stand base and body.

Installing on a Table

Adjusting the Stand Height

Adjusting the Angle

Installing on the Wall

USING THE MONITOR

Connecting to a PC

General information about connecting the monitor to a PC and Plug and Play feature.

HDMI Connection

Details on connecting the monitor to a PC via HDMI for video and audio signals.

DisplayPort Connection

Thunderbolt (4) Connection

USER SETTINGS

Activating the Main Menu

Main Menu Features

OSD Menu Navigation and Settings

Ratio

Function Details

PBP Details

Picture Settings

Color Settings

System Settings

Reset Settings

TROUBLESHOOTING

No Screen Display Issues

Troubleshooting steps for issues where the screen displays no image.

OSD Lock and Screen Retention

Unstable Display and Shadow Trails

Abnormal Color Display and Sound Issues

PRODUCT SPECIFICATION

Display and Signal Specifications

PROPER POSTURE

Proper Posture for Using the Monitor

LG 34UC87 Specifications

General IconGeneral
3DNo
HD type-
Aspect ratio21:9
Display surfaceMatt
Display diagonal34 \
Display technologyLED
Contrast ratio (typical)1000:1
Display number of colors1.073 billion colors
Display brightness (typical)300 cd/m²
Supported graphics resolutions3440 x 1440
On/off switchYes
USB hub version3.2 Gen 1 (3.1 Gen 1)
VGA (D-Sub) ports quantity0
RMS rated power14 W
Product colorBlack
LED indicatorsPower
Panel mounting interface100 x 100 mm
Power consumption (off)0.3 W
Annual energy consumption79 kWh
Power consumption (standby)- W
Power consumption (typical)54 W
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)225.6 mm
Height (with stand)472.9 mm
Depth (without stand)99 mm
Width (without stand)830.5 mm
Height (without stand)370.3 mm
Weight (without stand)- g

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