LG 43UD79-B User Manual (English)

Questions and Answers:

J
jennifer20Jul 27, 2025
Why is nothing displayed on my LG Monitor screen?
- M
  Margaret MorrisonJul 27, 2025
  There are several reasons why your LG Monitor screen might be blank. First, ensure the power cord is securely plugged into the power outlet and that the power cable is properly connected. Press the power button. Also, verify that the correct input is enabled by navigating to Menu > Input > Input List. If the signal from your PC is outside the monitor's frequency range, consult the Product Specification section of the manual to adjust the frequency. Finally, check the signal cable between the PC and monitor to ensure it is properly connected.
J
Jennifer MedinaJul 31, 2025
How to fix no sound from LG 43UD79-B headphone port or speaker?
- A
  Ashley AlexanderAug 1, 2025
  If there is no sound from the headphone port or speaker of your LG Monitor, first try increasing the volume using the button on the monitor. If that doesn't work, set the audio output of your PC to the monitor you are using. In Microsoft Windows, go to Control Panel > Hardware and Sound > Sound and set the monitor as the default device.
S
Sarah WrightAug 5, 2025
What to do if the display color is abnormal on my LG 43UD79-B Monitor?
- A
  Alexander LewisAug 5, 2025
  If the display color on your LG Monitor appears abnormal, try the following steps: First, set the color to 24 bit (true color) or higher by navigating to Control Panel > Display > Settings > Color Quality in Windows. Next, check the signal cable connection, reconnect it, or reinsert the PC's graphics card. If you notice pixilated spots (red, green, blue, white, or black), this is normal for an LCD screen and not related to the monitor's performance.
E
Edward KiddAug 9, 2025
How to fix unstable and shaky screen display on LG 43UD79-B?
- A
  Andrea MccoyAug 9, 2025
  If your LG Monitor's screen display is unstable, shaky, or images leave shadow trails, and if 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.
S
Scott RobertsAug 13, 2025
What to do if the screen retains an image on my LG Monitor?
- B
  belljeremyAug 13, 2025
  If your LG Monitor screen retains an image, it may be due to displaying a still image for a prolonged time, which can cause damage. To extend the monitor's lifetime, use a screensaver.
S
Susan HensonAug 17, 2025
What to do if I see an "Unrecognized monitor, Plug&Play (VESA DDC) monitor found" message on my LG Monitor?
- D
  Donald CooperAug 17, 2025
  If you see an "Unrecognized monitor, Plug&Play (VESA DDC) monitor found" message, install the display driver from the CD or diskette that came with your LG Monitor, or download it from the LG website at http://www.lg.com. Also, ensure that your video card supports the Plug&Play function.
T
turnerkristinAug 22, 2025
Why is the OSD lock message being displayed on my LG 43UD79-B Monitor?
- J
  Jennifer RossAug 22, 2025
  The OSD lock message on your LG Monitor indicates that the OSD is locked. To unlock it, go to Menu > General and set OSD Lock to Off.

LG 43UD79-B Specifications

General

DDC/CI	Yes
Pixel pitch	0.2451 x 0.2451 mm
Screen shape	Flat
Response time	8 ms
Backlight type	W-LED
Display diagonal	42.5 \
Display technology	LED
Native aspect ratio	16:9
Maximum refresh rate	60 Hz
NTSC coverage (typical)	72 %
Contrast ratio (typical)	1000:1
Display number of colors	-
Digital vertical frequency	56 - 61 Hz
Digital horizontal frequency	30 - 135 kHz
Display brightness (typical)	350 cd/m²
Supported graphics resolutions	3840 x 2160
Dynamic contrast ratio marketing name	Mega Contrast
USB hub version	3.2 Gen 1 (3.1 Gen 1)
HDMI ports quantity	4
USB upstream port type	USB Type-C
Number of upstream ports	1
VGA (D-Sub) ports quantity	0
USB Type-A downstream ports quantity	2
RMS rated power	20 W
Exterior finish type	Matt
Certification	UL (cUL), TUV, CB, FCC-B, CE, CCC, BSMI, KC, ErP, ROHS, REACH, Windows 10, DisplayPort
Product color	Black
Tilt angle range	-5 - 10 °
Number of OSD languages	17
Panel mounting interface	200 x 200 mm
On Screen Display (OSD) languages	CHI (SIMPL), CHI (TR), DEU, ENG, ESP, FIN, FRE, GRE, ITA, JPN, KOR, POL, POR, RUS, SWE, UKR
Sustainability certificates	EPEAT Gold
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (off)	0.3 W
Power consumption (standby)	- W
Power consumption (typical)	70 W
Power consumption (PowerSave)	0.5 W
Cables included	DC, DisplayPort, HDMI, RS-232, USB
Package type	Box
Package depth	285 mm
Package width	1065 mm
Package height	658 mm
Package weight	20000 g
Harmonized System (HS) code	85285210

Weight and Dimensions

Depth (with stand)	275 mm
Height (with stand)	647.6 mm
Weight (with stand)	15900 g
Depth (without stand)	70.6 mm
Width (without stand)	967 mm
Height (without stand)	575.2 mm
Weight (without stand)	12300 g

Summary

LICENSE

ASSEMBLING AND PREPARING

Product Components

Lists all included items in the monitor box for setup.

Supported Drivers and Software

Details drivers and software needed for the monitor's functionality.

Component and Button Description

Explains the physical components and buttons on the monitor.

How to Use the Joystick Button

Provides instructions on operating the monitor using the joystick button.

Input Connector

Details the various input ports available on the monitor for connectivity.

Moving and Lifting the Monitor

Safety guidelines and instructions for safely handling and moving the monitor.

Installing the Monitor

Step-by-step guide for setting up the monitor.

Assembling the Stand Base

Instructions on how to assemble the monitor's stand base.

Using the Cable Holder

Instructions on how to organize cables using the provided cable holder.

Installing onto a Table

Guide for placing and connecting the monitor on a table.

Adjusting the Angle

Instructions for adjusting the monitor's screen tilt for better viewing.

Using the Kensington Lock

Information on how to use the Kensington security lock for theft prevention.

Installing the Wall Mount Plate

Steps for attaching a wall mount plate to the monitor.

Installing to a Wall

Guidelines for securely mounting the monitor onto a wall.

REMOTE CONTROL

USING THE MONITOR

Connecting to a PC

How to connect a computer to the monitor for display output.

HDMI Connection

Instructions for connecting the monitor using an HDMI cable.

DisplayPort Connection

Instructions for connecting the monitor using a DisplayPort cable.

USB-C Connection

Guide for connecting the monitor via USB Type-C for video and data.

Connecting to AV Devices

How to connect audio/video devices to the monitor using HDMI.

Connecting Peripherals

Details on connecting USB devices like keyboards and mice to the monitor hub.

Connecting to External Devices

Instructions for connecting headphones to the monitor's audio output.

USER SETTINGS

Activating the Main Menu

Steps to access and navigate the monitor's main menu using the joystick.

Main Menu Features

Overview of the primary functions and options available in the monitor's main menu.

Input and Connectivity Settings

Configure input sources, aspect ratio, and connection modes like PBP/PIP.

Picture and Display Settings

Adjust picture modes, color, brightness, contrast, and sharpness for optimal viewing.

General and System Settings

Configure language, sound, energy saving, OSD lock, and other system-wide options.

TROUBLESHOOTING

No Display Issues

Troubleshooting steps for when the monitor screen remains blank.

OSD Lock Resolution

How to resolve issues when monitor settings are locked.

Image Retention Problems

Addressing problems like image sticking or screen burn-in.

Display Instability and Shaking

Resolving issues with flickering, shaking, or ghosting on the display.

Display Color Issues

Solutions for discolored, unstable, or pixelated display colors.

Driver and Recognition Problems

Troubleshooting unrecognized monitor messages and driver installation.

Audio Output Problems

Resolving issues with no sound from speakers or headphones.

SPECIFICATIONS

LCD Screen Specifications

Details about the screen type, pixel pitch, and resolution.

Video Signal and Input Connectors

Information on supported video signals and physical input ports.

Power and Environmental Details

Power consumption, operating temperatures, and humidity levels.

Dimensions and Weight

Physical size and weight of the monitor with and without the stand.

Factory Support Mode

Lists supported display modes and their frequency parameters for PC input.

DisplayPort and USB-C Specifications

Supported display modes and frequency parameters for DisplayPort and USB-C inputs.

HDMI Timing Specifications

Timing specifications for video signals received via HDMI.

Power LED Indicator

Explains the function and color of the monitor's power LED indicator.

EXTERNAL CONTROL DEVICE SETUP

Communication Parameters

Technical parameters for serial communication with external control devices.

Transmission Command Format

Details on the format and structure of commands for external control.

OK Acknowledgement Format

Format of the acknowledgment message for successful commands.

Error Acknowledgement Format

Format of the error message for failed commands or communication issues.

Command Reference List

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