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LG 34UM88 - User Manual

LG 34UM88
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OWNER’S MANUAL
IPS LED
MONITOR
(LED Monitor*)
www.lg.com
* LG LED Monitor applies LCD screen with LED backlights.
Please read this manual carefully before operating your set and retain it for future
reference.
34UM88
34UM88C

Table of Contents

Questions and Answers

  • R
    Ricky CollinsJul 27, 2025
    What to do if nothing is displayed on my LG 34UM88 Monitor screen?
    • S
      Suzanne PerryJul 27, 2025
      If nothing is displayed on your LG Monitor screen, start by checking if the power cord is correctly plugged into the power outlet. Ensure the power cable is connected securely and press the power button. Verify that the connected input source is enabled by navigating to Menu > Quick Settings > Input. If the monitor is in sleep mode, try moving the mouse or pressing any key on the keyboard. Also, confirm that your computer is turned on. Check the cable and reconnect it. If the signals transferred from the PC (Graphics card) are out of the horizontal or vertical frequency range of the monitor, please see the Product Specification section of this manual to set the appropriate frequency.
  • T
    Timothy LopezJul 30, 2025
    Why is there no sound from the headphone port on my LG 34UM88?
    • C
      Carla GarciaJul 31, 2025
      If there's no sound from the headphone port on your LG Monitor, ensure that the headphone port connections are properly made. Try increasing the volume using the joystick. Also, set the audio output of the PC to the monitor you are using. On Microsoft Windows, go to Control Panel > Hardware and Sound > Sound > set the Monitor as default device.
  • S
    Steven SmithAug 4, 2025
    Why is the display color abnormal on my LG 34UM88 Monitor?
    • C
      Christine EdwardsAug 4, 2025
      If the display color is abnormal on your LG Monitor, first set the color to 24 bit (true color) or higher by navigating to Control Panel > Display > Settings > Color Quality in Windows. Also, check if the signal cable is properly connected; try reconnecting the cable or reinserting the PC's Graphics card. Note that sometimes, this is not an error, nor is it related to the monitor's performance.
  • V
    Veronica GriffithAug 8, 2025
    How to fix unstable and shaky screen display on LG 34UM88?
    • C
      Christopher AllenAug 8, 2025
      If your LG Monitor's screen display is unstable and shaky, and/or images displayed on the monitor leave shadow trails, it might be due to the selected resolution. If the resolution is HDMI 1080i 60/50 Hz (interlaced), the screen may be flickering. Change the resolution to 1080p or the recommended resolution.
  • T
    Thomas MclaughlinAug 12, 2025
    What to do if I see an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message on my LG 34UM88 Monitor?
    • H
      Hannah HallAug 12, 2025
      If you see an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message, be sure to install the display driver from the display driver CD (or diskette) that comes with your display. Also, make sure to check if the video card supports Plug and Play function.
  • N
    Nicholas RichardsAug 17, 2025
    How to turn off OSD Lock on LG Monitor?
    • V
      vmcdowellAug 17, 2025
      To turn off the OSD Lock on your LG Monitor, go to Menu > General and set OSD Lock to Off.
  • C
    Catherine PayneAug 21, 2025
    Why does the screen of my LG 34UM88 Monitor retains an image?
    • E
      Elizabeth RosarioAug 21, 2025
      Displaying a still image for a prolonged time may cause damage to the screen, resulting in the retention of the image. To extend the lifetime of your LG monitor, use a screensaver.

Summary

LICENSE

ASSEMBLING AND PREPARING

Product Composition

Lists all included accessories and components in the product package.

Supported Drivers and Software

Details the drivers and software compatible with the monitor models.

Product and Button Description

Identifies the physical buttons and indicators on the monitor.

How to Use the Joystick Button

Explains the functions and operations of the monitor's joystick button.

Input Connector

Illustrates and identifies the various input ports on the monitor.

Moving and Lifting the Monitor

Provides instructions for safely moving and lifting the monitor to prevent damage.

Assembling the Stand

Step-by-step instructions for attaching the monitor stand.

Installing on a Table

Details how to place and connect the monitor on a flat surface.

Adjusting the Stand Height

Explains how to change the monitor's vertical position.

Adjusting the Angle

Instructions for tilting the monitor screen for optimal viewing.

Tidying up Cables

Shows how to manage and organize connecting cables using the cable holder.

Using the Kensington Lock

Explains how to attach and use a security cable for the monitor.

Installing the Wall Mount Plate

Guides on preparing the monitor for wall mounting.

Installing on the Wall

Provides instructions for securely mounting the monitor onto a wall.

USING THE MONITOR

Connecting to a PC

Details how to connect a computer to the monitor for display output.

Connecting AV Devices

Explains how to connect external audio/video devices using HDMI.

Connecting Peripherals

Describes how to connect USB devices and headphones to the monitor.

USER SETTINGS

Activating the Main Menu

Steps to access and navigate the monitor's main on-screen display menu.

Main Menu Features

Overview of the main menu options available for monitor configuration.

Menu Settings

Detailed descriptions of various menu options and their functions.

Quick Settings

PBP

Picture

Picture Mode

Options for selecting pre-defined picture settings for different content types.

Picture Adjust

Settings for fine-tuning image parameters like sharpness and black level.

Game Adjust

Adjustments specific to gaming, such as response time and FreeSync.

Color Adjust

Settings for customizing color temperature, gamma, and hue.

Sound

MaxxAudio

Enables or disables the MaxxAudio sound enhancement feature.

MaxxAudio Settings

Allows manual adjustment of sound quality parameters.

Midnight Mode

Optimizes sound for low-volume listening.

General

Language

Sets the display language for the on-screen menu.

SMART ENERGY SAVING

Configures power saving modes for reduced energy consumption.

Power LED

Controls the on/off status of the monitor's power indicator light.

Automatic Standby

Sets the monitor to turn off automatically after a period of inactivity.

DisplayPort 1.2

Enables or disables the DisplayPort 1.2 feature for enhanced video output.

Quick Charge

Feature to rapidly charge connected USB devices.

Buzzer

Controls the audible alert sound when the monitor powers on.

OSD Lock

Prevents unauthorized changes to menu settings.

Reset

Do you want to reset your settings?

Option to restore all monitor settings to their factory defaults.

TROUBLESHOOTING

PRODUCT SPECIFICATION

Factory Support Mode

Lists supported preset modes and their signal timing specifications.

HDMI Timing (Video)

Details the timing specifications for various video resolutions over HDMI.

Power LED

Describes the LED color and behavior for different power states.

LG 34UM88 Specifications

General IconGeneral
BrandLG
Model34UM88
CategoryMonitor
LanguageEnglish

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