LG UltraFine 34GL750 User Manual

LG UltraFine 34GL750

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* LG LED Monitor applies LCD screen with LED

backlights.

Please read this manual carefully before operating

your set and retain it for future reference.

34GL750

34GN73A

www.lg.com

Copyright © 2019 LG Electronics Inc. All Rights Reserved.

OWNER’S MANUAL

(LED Monitor*)

Questions and Answers:

A
Ann BellJul 28, 2025
What to do if nothing is displayed on my LG UltraFine 34GL750 Monitor screen?
- K
  Keith Cooper DDSJul 28, 2025
  If your LG Monitor screen is blank, ensure the power cord is securely plugged into the outlet and the power cable is properly connected. Press the power button. Also, verify that the correct input is enabled in the monitor's settings under the Input menu. If the monitor is in sleep mode, try moving the mouse or pressing a key on the keyboard. Make sure your computer is turned on. If the signal cable between the PC and monitor is missing or disconnected, check the cable and reconnect it. Finally, ensure you've installed the latest display driver from the LG website and confirm that your graphics card supports Plug and Play.
A
Andrea BlairAug 3, 2025
What to do if there is no sound from the headphone port on my LG Monitor?
- C
  conniecainAug 3, 2025
  If you're not getting any sound from the headphone port on your LG Monitor, first, check that the headphone connections are properly made. Next, try increasing the volume using the joystick on the monitor. Lastly, ensure that the PC's audio output is set to the monitor. On Microsoft Windows, go to Control Panel > Hardware and Sound > Sound and set the Monitor as the default device.
W
wphillipsAug 7, 2025
Why is my LG UltraFine 34GL750 Monitor screen display unstable and shaky?
- T
  Tony WeissAug 7, 2025
  If your LG Monitor's screen display is unstable or shaky, or if images leave shadow trails, it might be due to the selected resolution. If you're using HDMI 1080i 60/50 Hz (interlaced), the screen may flicker. Try changing the resolution to 1080p or the recommended resolution.
N
Natalie StewartAug 12, 2025
Why is the display color abnormal on my LG UltraFine 34GL750?
- C
  Chad KentAug 12, 2025
  If the display color on your LG Monitor appears abnormal, first, ensure that the color is set to 24-bit (true color) or higher. In Windows, navigate to Control Panel > Display > Settings > Color Quality to adjust this setting. Next, check the signal cable connection; try reconnecting the cable or reinserting the PC's graphics card. Note that small, colored spots (red, green, blue, white, or black) may appear, which is normal for LCD screens.
J
Jeffrey DiazAug 17, 2025
How to prevent image retention on my LG UltraFine 34GL750 Monitor?
- A
  Amber HudsonAug 18, 2025
  Displaying a still image for a long time can damage the screen of your LG Monitor, causing image retention. To extend the monitor's life, use a screensaver.
M
Mark RandolphAug 22, 2025
How to enable disabled features on my LG Monitor?
- A
  againesAug 22, 2025
  If some features are disabled on your LG Monitor, the OSD might be locked. To unlock it, go to Settings > General and set OSD Lock to Off.

LG UltraFine 34GL750 Specifications

General

Screen Size	34 inches
Resolution	2560 x 1080
Panel Type	IPS
Refresh Rate	144Hz
Aspect Ratio	21:9
Brightness	300 cd/m²
Contrast Ratio	1000:1
Adaptive Sync	AMD FreeSync
Color Gamut	sRGB 99%
HDR	HDR10
VESA Mount	100 x 100 mm
Ports	2x HDMI, 1x DisplayPort
Viewing Angle	178° (H) / 178° (V)

Summary

LICENSE

OPEN SOURCE SOFTWARE NOTICE INFORMATION

ASSEMBLING AND PREPARING

Supported Drivers and Software

Information on downloading and installing necessary drivers and software for the monitor.

Product and Button Overview

Description of the monitor's physical features and the function of its joystick button.

Joystick Operation

Instructions on how to use the monitor's joystick button for navigation and control.

Moving and Lifting Safely

Guidance on safely moving and lifting the monitor to prevent damage or injury.

Table Installation

Instructions for placing and installing the monitor on a table, ensuring proper ventilation.

Stand Adjustments

How to adjust the monitor's stand height and screen angle for optimal viewing.

Cable Management and Security

Tips for tidying cables and using the Kensington lock for security.

Wall Mounting

Instructions for installing the wall mount plate and mounting the monitor on a wall.

USING THE MONITOR

PC Connectivity

Connect your computer to the monitor using HDMI or DisplayPort for video and audio.

AV and Peripheral Connectivity

Connect external AV devices via HDMI and USB peripherals like keyboards and mice.

Headphone Audio Connection

Connect headphones to the monitor's audio jack for sound output.

USER SETTINGS

Activating the Main Menu

Explains how to access and navigate the monitor's On-Screen Display (OSD) menu.

Main Menu Features

Details the functions and options available within the monitor's main menu.

Menu Settings

Describes specific settings within the OSD menu, such as Game Mode, Picture Adjust, and Input.

TROUBLESHOOTING

Display and Signal Issues

Solutions for no display, no signal, or screen flickering problems.

Feature and Audio Problems

Addresses unavailable features like OSD lock and issues with headphone audio output.

Screen Image Quality

Troubleshoots unstable display, image trails, and color abnormalities.

PRODUCT SPECIFICATION

General Specifications

Covers LCD screen details, resolution, power requirements, and environmental conditions.

Dimensions and Weight

Provides the physical dimensions and weight of the monitor with and without the stand.

Factory Support Mode Timings

Lists horizontal and vertical frequency timings for factory support mode via HDMI/DisplayPort.

HDMI Video Timing and Power LED

Details HDMI video timings and explains the Power LED status indicators.

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