LG 34UM88C-P - User Manual

Questions and Answers

J
Jeremy KingJul 27, 2025
What to do if nothing is displayed on my LG Monitor screen?
- A
  ahernandezJul 28, 2025
  If nothing is displayed on your LG Monitor screen, first, ensure the power cord is correctly plugged into the power outlet. Next, check the power cable connection and press the power button. Verify that the connected input is enabled by going to Menu > Quick Settings > Input. Also, if the monitor is in sleep mode, move the mouse or press any key on the keyboard. Make sure your computer is turned on. If the signals from the PC are out of the monitor's frequency range, see the Product Specification section of this manual to set the appropriate frequency. Finally, check the cable and reconnect it.
B
byrdwilliamAug 1, 2025
What to do if there is no sound from the headphone port on my LG 34UM88C-P Monitor?
- W
  wilsonlarryAug 1, 2025
  If there is no sound from the headphone port on your LG Monitor, ensure that the headphone port connections are properly made. Also, try increasing the volume using the joystick. Finally, set the audio output of the PC to the monitor you are using by going to Control Panel > Hardware and Sound > Sound in Microsoft Windows, and set the Monitor as the default device.
J
jsmithAug 5, 2025
Why is the display color abnormal on my LG Monitor?
- L
  Lisa GarciaAug 5, 2025
  If the display color is abnormal on your LG Monitor, set the color to 24 bit (true color) or higher by going to Control Panel > Display > Settings > Color Quality in Windows. Also, check if the signal cable is connected properly; reconnect the cable or reinsert the PC's Graphics card. Note that sometimes this is not an error and is not related to the monitor's performance.
P
pellisAug 9, 2025
How to fix unstable and shaky screen display on LG Monitor?
- C
  Christopher HamiltonAug 10, 2025
  If your LG Monitor's screen display is unstable and shaky, or if images 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.
M
Michael HunterAug 14, 2025
Why does my LG Monitor screen retain an image?
- K
  Kristina CurryAug 14, 2025
  Displaying a still image for a prolonged time may cause damage to the screen of your LG Monitor, resulting in the retention of the image. To extend the lifetime of the monitor, use a screensaver.
K
karengreeneAug 18, 2025
How to resolve 'Unrecognized monitor, Plug and Play (VESA DDC) monitor found' message on LG 34UM88C-P?
- D
  David SmithAug 18, 2025
  To resolve the 'Unrecognized monitor, Plug and Play (VESA DDC) monitor found' message on your LG Monitor, install the display driver from the display driver CD (or diskette) that came with your display. You can also download the driver from the LG website. Ensure that the graphics card supports the Plug and Play function.
C
Christian WhitakerAug 22, 2025
How to turn off OSD Lock message on LG 34UM88C-P?
- K
  Kyle MclaughlinAug 22, 2025
  To turn off the OSD Lock message on your LG Monitor, go to Menu > General and set OSD Lock to Off.

Summary

License Information

Assembling and Preparing the Monitor

Product Composition

Details the included components in the product package.

Supported Drivers and Software

Lists drivers and software compatible with the monitor models.

Product and Button Description

Identifies the monitor's physical components and buttons.

How to Use the Joystick Button

Explains the basic functions controlled by the monitor's joystick button.

Input Connector

Illustrates the various input ports available on the monitor.

Moving and Lifting the Monitor

Provides essential safety instructions for handling and transporting the monitor.

Installing the Monitor

Guides on setting up the monitor, including stand assembly and wall mounting.

Assembling the Stand

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

Installing on a Table

Procedure for placing and connecting the monitor on a desk or table.

Adjusting the Stand Height

Instructions on how to modify the monitor's vertical screen position.

Adjusting the Angle

Guide for tilting the monitor screen forward or backward for optimal viewing.

Tidying up Cables

Methods for organizing and managing connected cables for a neat setup.

Using the Kensington Lock

Information on securing the monitor using a Kensington lock system.

Installing the Wall Mount Plate

Steps for attaching a wall mount plate to the monitor.

Installing on the Wall

Guidelines for safely mounting the monitor onto a wall.

Using the Monitor

Connecting to a PC

Instructions for connecting a computer to the monitor for display.

HDMI Connection

Details on establishing a video and audio connection via HDMI.

DisplayPort Connection

Guide for connecting the monitor using a DisplayPort cable.

Thunderbolt Connection

Instructions for connecting devices via the monitor's Thunderbolt port.

Connecting AV Devices

How to connect audio-visual equipment to the monitor.

HDMI Connection

Connects AV devices to the monitor using an HDMI cable.

Connecting Peripherals

Information on connecting external devices like keyboards and mice.

USB Cable connection - PC

Steps to connect the monitor to a PC using a USB cable for hub functionality.

Connecting Headphones

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

User Settings and Configuration

Activating the Main Menu

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

Main Menu Features

Overview of the different options available within the main menu.

Menu Settings

Detailed explanation of various monitor settings like picture, sound, and general.

Troubleshooting Common Issues

Display and Signal Issues

Solutions for no display, out of range, no signal, and unstable screen problems.

Color and Recognition Problems

Addresses abnormal color display and unrecognized monitor messages.

Audio Output Issues

Troubleshooting steps for problems with sound from the headphone port.

Product Specifications

Factory Support Mode

Lists supported preset modes, horizontal, and vertical frequencies for different connections.

HDMI Timing (Video)

Details the horizontal and vertical frequencies for various HDMI video preset modes.

Power LED

Describes the LED indicator's color and behavior in different operating modes.

LG 34UM88C-P Specifications

General

3D	No
DDC/CI	Yes
Pixel pitch	0.2325 x 0.2325 mm
Screen shape	Flat
Display diagonal	34 \
Display technology	LED
Native aspect ratio	21:9
Peak luminance ratio	66 %
sRGB coverage (typical)	99 %
Contrast ratio (typical)	1000:1
Display number of colors	1.073 billion colors
Display brightness (peak)	- cd/m²
Digital vertical frequency	56 - 61 Hz
Digital horizontal frequency	30 - 90 kHz
Display brightness (typical)	300 cd/m²
Supported graphics resolutions	3440 x 1440
Dynamic contrast ratio marketing name	Mega Contrast
USB hub version	3.2 Gen 1 (3.1 Gen 1)
Headphone connectivity	3.5 mm
USB upstream port type	USB Type-B
Number of upstream ports	1
VGA (D-Sub) ports quantity	0
USB Type-A downstream ports quantity	2
Tilt angle range	-5 - 20 °
Panel mounting interface	100 x 100 mm
Audio system	Maxx
On/off switch	-
Mercury content	0 mg
AC input voltage	100 - 240 V
Power consumption (off)	0.3 W
Annual energy consumption	79 kWh
Power consumption (standby)	1.2 W
Power consumption (typical)	65 W
RMS rated power	14 W
Certification	UL (cUL), TUV, FCC-B, CE, ErP, Windows, DisplayPort
Product color	Black
Package depth	207 mm
Package width	978 mm
Package height	522 mm
Package weight	11300 g
Package material	Expanded polystyrene (EPS)
Cables included	AC, DisplayPort, HDMI

Weight and Dimensions

Depth (with stand)	252.4 mm
Height (with stand)	428.9 mm
Weight (with stand)	8400 g
Depth (without stand)	49.2 mm
Width (without stand)	829.9 mm
Height (without stand)	379.8 mm
Weight (without stand)	6300 g