LG 34WN750-B User Manual (English)

Questions and Answers:

L
Lori KellyJul 29, 2025
Why is nothing displayed on my LG Monitor screen?
- W
  Wesley OlsonJul 29, 2025
  There could be several reasons why nothing is displayed on your LG monitor's screen. First, ensure the power cord is correctly plugged into the power outlet and that the power cable connection is secure, then press the power button. Also, verify that the connected input is enabled in the monitor's settings under the Input section. This issue can also occur if the signal cable between your PC and the monitor is either missing or disconnected, so check the cable and reconnect it securely. Finally, the signals transferred from the PC (graphics card) might be out of the monitor's horizontal or vertical frequency range. Refer to the Product Specification section of the manual to set the appropriate frequency.
W
William RiveraAug 3, 2025
Why is there no sound from the headphone port on my LG Monitor?
- C
  Cassidy MataAug 4, 2025
  If there is no sound from the headphone port on your LG monitor, first ensure that the headphone port connections are made properly. If the connections are correct, try increasing the volume using the joystick. Also, make sure to set the audio output of the PC to the monitor you are using. Note that the settings may differ depending on the operating system you use.
K
Karen MccarthyAug 10, 2025
How to enable disabled features on LG 34WN750-B?
- J
  Joshua WallaceAug 10, 2025
  If some features are disabled on your LG monitor, the OSD might be locked. To enable the features, disable OSD Lock in the General settings.
B
barry39Aug 16, 2025
What to do if my LG Monitor screen display is unstable and shaky?
- K
  kimberlylloydAug 16, 2025
  If your LG monitor's screen display is unstable or shaky, or if images displayed on the monitor leave shadow trails, and the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the screen may be flickering. Try changing the resolution to 1080p or the recommended resolution. Also, not setting the graphics card to the recommended (optimal) resolution may result in blurred text, a dimmed screen, a truncated display area or misalignment of the display.
M
Mary EvansAug 22, 2025
How to fix an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message on my LG monitor?
- H
  hbirdAug 22, 2025
  If you see an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message, be sure to install the display driver from the LG website. Also, make sure to check if the graphics card supports Plug and Play function.

LG 34WN750-B Specifications

General

Color	black
Screen Type	led
Tiltable	yes
Wall Mount	100mm x 100mm
Touch Screen	no
Webcam	no
OS Compatibility	not applicable
Screen Size	34 inches
Panel Type	ips
Aspect Ratio	21:9
Resolution	3440 x 1440
Native Resolution	3440 x 1440
Refresh Rate	75hz
Horizontal Viewing Angle	178 degrees
Vertical Viewing Angle	178 degrees
Response Time	5 milliseconds
Brightness	300 candela per square meter
Contrast Ratio	2500:1
Synchronization	freesync (amd adaptive sync)
HDR	yes
HDR Format	hdr 10
Built-In Speakers	no
HDMI Ports	2
Display Port Inputs	1
VGA Ports	0
DVI	0
Thunderbolt Ports	0
Headphones Output	yes
Power Saving Mode	0.5 watts
Power Consumption	45 watts
Depth with Stand	8.9 inches
Height with Stand	22.3 inches
Width with Stand	32.2 inches
Depth without Stand	1.8 inches
Height without Stand	14.4 inches
Net Weight without Stand	18.9 pounds

Summary

OPEN SOURCE SOFTWARE NOTICE INFORMATION

ASSEMBLING AND PREPARING

Product and Button Description

How to Use the Joystick Button

Instructions for operating the monitor using the joystick button.

Moving and Lifting the Monitor

Guidelines for safely moving and transporting the monitor to prevent damage.

Installing on a Table

Adjusting the Stand Height

Adjusting the Angle

Using the Kensington Lock

Installing the Wall Mount Plate

Installing on the Wall

USING THE MONITOR

Connecting to a PC

How to connect the monitor to a computer using various cable types like HDMI and DisplayPort.

HDMI Connection (PC)

Details on transmitting digital video and audio signals via HDMI for PC connection.

DisplayPort Connection

Details on transmitting digital video and audio signals via DisplayPort for PC connection.

Connecting AV Devices

HDMI Connection (AV Devices)

Details on using HDMI for connecting AV devices and recommended cable types.

Connecting Peripherals

USB Device Connection

How to use the monitor's USB ports as a hub for connecting various devices.

Headphones Connection

USER SETTINGS

Activating the Main Menu

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

Main Menu Features

Menu Settings Navigation

Quick Settings

Screen Brightness

Adjusting the screen's contrast and brightness levels for optimal viewing.

Screen Contrast

Adjusting screen contrast for optimal viewing.

Volume Level

Adjusting the monitor's audio volume level.

Color Temperature

Customizing the screen color temperature by selecting preset or manual modes.

MaxxAudio Feature

Enabling or disabling the MaxxAudio sound enhancement feature.

Input Selection

Input List

Choosing the active input source from a list of available connection types.

Aspect Ratio Adjustment

Adjusting the screen's aspect ratio for different video signal inputs.

Picture Settings

Picture Mode on SDR Signal

Custom, Vivid, HDR Effect, Reader, FPS, RTS, and Color Weakness modes for SDR content.

Picture Mode on HDR Signal

Custom, Vivid, Cinema, FPS, and RTS modes for HDR content.

Picture Adjustments

Brightness, Contrast, Sharpness, SUPER RESOLUTION+, Black Level, and DFC settings.

Game Adjustments

Response Time, FreeSync, and Black Stabilizer settings for gaming.

Color Adjustments

Gamma, Color Temperature, RGB, Six Color (Hue, Saturation) settings.

Picture Reset

Resets all picture settings to their default values.

Sound Settings

Volume Control

Adjusts the volume level for headphones or speakers.

MaxxAudio Feature

Enables or disables the MaxxAudio sound enhancement feature.

General Settings

Language Settings

Sets the monitor's On-Screen Display (OSD) menu language.

SMART ENERGY SAVING

Conserves energy by optimizing screen luminance and power usage.

Power LED Control

Controls the operation and display of the monitor's power indicator light.

Automatic Standby Feature

Automatically turns off the monitor after a set period of inactivity.

DisplayPort Version Settings

Sets the DisplayPort version to match the connected device for optimal compatibility.

HDMI Compatibility Mode

Enables compatibility with legacy equipment that may not support HDMI 2.0.

Buzzer Settings

Enables or disables the audible buzzer sound when the monitor powers on.

OSD Lock

Disables the monitor's On-Screen Display (OSD) menu adjustments.

Information Display

Displays information such as total power-on time and screen resolution.

Reset to Initial Settings

Resets all monitor settings to their factory default configuration.

TROUBLESHOOTING

No Display on Screen

Troubleshooting steps for when the monitor screen remains blank or shows no image.

Screen Instability and Image Trails

Solutions for screen instability, flickering, or image ghosting issues.

Image Sticking Issues

Addresses potential image retention issues, often caused by static images.

Screen Spots Explanation

Explains the normal appearance of pixel spots on LCD screens and differentiates from errors.

Disabled Features Troubleshooting

Identifies reasons why certain monitor functions might be unavailable or locked.

Menu Button Functionality Issues

Troubleshooting for unavailable menu functions, often related to OSD Lock.

Unrecognized Monitor Message

Headphone Port Audio Issues

No Sound with Images

Diagnosing and fixing problems where audio is not produced through the monitor's headphone jack.

PRODUCT SPECIFICATION (34WN750)

Color Depth Support (34WN750)

Specifies the color depth support for the monitor.

Display Resolution (34WN750)

Lists the maximum and recommended display resolutions for the monitor.

Power Source Details (34WN750)

Details the power rating and input voltage requirements for the monitor.

AC/DC Adapter Information (34WN750)

Information on the AC/DC adapter specifications and manufacturers.

Environmental Conditions (34WN750)

Specifies the operating and storing temperature and humidity ranges.

Monitor Dimensions (34WN750)

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

Size with Stand (mm) (34WN750)

Physical dimensions of the monitor including the stand.

Size without Stand (mm) (34WN750)

Physical dimensions of the monitor without the stand.

Product Weight (34WN750)

Weight with Stand (kg) (34WN750)

The weight of the monitor when it includes the stand.

Weight without Stand (kg) (34WN750)

The weight of the monitor when the stand is removed.

PRODUCT SPECIFICATION (34BN770)

Color Depth Support (34BN770)

Specifies the color depth support for the monitor.

Display Resolution (34BN770)

Lists the maximum and recommended display resolutions for the monitor.

Power Source Details (34BN770)

Details the power rating and input voltage requirements for the monitor.

AC/DC Adapter Information (34BN770)

Information on the AC/DC adapter specifications and manufacturers.

Environmental Conditions (34BN770)

Specifies the operating and storing temperature and humidity ranges.

Monitor Dimensions (34BN770)

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

Size with Stand (mm) (34BN770)

Physical dimensions of the monitor including the stand.

Size without Stand (mm) (34BN770)

Physical dimensions of the monitor without the stand.

Product Weight (34BN770)

Weight with Stand (kg) (34BN770)

The weight of the monitor when it includes the stand.

Weight without Stand (kg) (34BN770)

The weight of the monitor when the stand is removed.

Factory Support Mode (Preset Mode, PC)

DisplayPort/HDMI Support

Lists supported preset modes for DisplayPort and HDMI connections.

Preset Mode Details

Details various preset modes available for PC input signals.

Horizontal Frequency (kHz)

Displays the horizontal scanning frequencies for each preset mode.

Vertical Frequency (Hz)

Displays the vertical scanning frequencies for each preset mode.

Polarity (H/V)

Indicates the horizontal and vertical polarity for each preset mode.

Remarks for Preset Modes

Additional notes or conditions for specific preset modes.

HDMI Timing (Video)

HDMI Preset Mode

Lists preset modes for video signals over HDMI.

HDMI Horizontal Frequency (kHz)

Displays horizontal frequencies for HDMI video timings.

HDMI Vertical Frequency (Hz)

Displays vertical frequencies for HDMI video timings.

Power LED Status

Information about the monitor's Power LED status and colors.

Related product manuals

LG 34WN750-B User Manual

Table of Contents

Questions and Answers:

LG 34WN750-B Specifications

Summary

OPEN SOURCE SOFTWARE NOTICE INFORMATION

ASSEMBLING AND PREPARING

Product and Button Description

How to Use the Joystick Button

Moving and Lifting the Monitor

Installing on a Table

Adjusting the Stand Height

Adjusting the Angle

Using the Kensington Lock

Installing the Wall Mount Plate

Installing on the Wall

USING THE MONITOR

Connecting to a PC

HDMI Connection (PC)

DisplayPort Connection

Connecting AV Devices

HDMI Connection (AV Devices)

Connecting Peripherals

USB Device Connection

Headphones Connection

USER SETTINGS

Activating the Main Menu

Main Menu Features

Menu Settings Navigation

Quick Settings

Screen Brightness

Screen Contrast

Volume Level

Color Temperature

MaxxAudio Feature

Input Selection

Input List

Aspect Ratio Adjustment

Picture Settings

Picture Mode on SDR Signal

Picture Mode on HDR Signal

Picture Adjustments

Game Adjustments

Color Adjustments

Picture Reset

Sound Settings

Volume Control

MaxxAudio Feature

General Settings

Language Settings

SMART ENERGY SAVING

Power LED Control

Automatic Standby Feature

DisplayPort Version Settings

HDMI Compatibility Mode

Buzzer Settings

OSD Lock

Information Display

Reset to Initial Settings

TROUBLESHOOTING

No Display on Screen

Screen Instability and Image Trails

Image Sticking Issues

Screen Spots Explanation

Disabled Features Troubleshooting

Menu Button Functionality Issues

Unrecognized Monitor Message

Headphone Port Audio Issues

No Sound with Images

PRODUCT SPECIFICATION (34WN750)

Color Depth Support (34WN750)

Display Resolution (34WN750)

Power Source Details (34WN750)

AC/DC Adapter Information (34WN750)

Environmental Conditions (34WN750)

Monitor Dimensions (34WN750)

Size with Stand (mm) (34WN750)

Size without Stand (mm) (34WN750)

Product Weight (34WN750)

Weight with Stand (kg) (34WN750)