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LG 27UN850 - User Manual

LG 27UN850
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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.
27UL850
27BL85U
27UN83A
27UN850
OWNER’S MANUAL
LED LCD MONITOR
(LED Monitor*)
www.lg.com
Copyright © 2018 LG Electronics Inc. All Rights Reserved.

Questions and Answers

  • J
    Jennifer SmithJul 29, 2025
    How to fix LG Monitor when nothing is displayed on the screen?
    • J
      Joshua OrtizJul 29, 2025
      If nothing is displayed on your LG Monitor screen, first, ensure the power cord is correctly plugged into the power outlet. Next, verify the power cable connection and press the power button. Then, check that the connected input is enabled in the monitor settings (Settings > Input). If the issue persists, inspect the signal cable between your PC and the monitor, ensuring it's properly connected. Lastly, confirm that the signals transferred from your PC (graphics card) are within the horizontal or vertical frequency range supported by the monitor. Refer to the Product Specification section of the manual to set the appropriate frequency.
  • J
    Jason RomeroAug 2, 2025
    Why is there no sound on my LG Monitor?
    • S
      Susan MillerAug 3, 2025
      If images are displayed without sound on your LG Monitor, ensure that the headphone port connections are correctly made. You can also try increasing the volume using the joystick on the monitor. Finally, set the audio output of your PC to the monitor you are using. Note that the exact settings may vary depending on your operating system.
  • H
    Heather MasonAug 7, 2025
    What to do if LG 27UN850 Monitor screen display is unstable and shaky?
    • A
      Anne PottsAug 7, 2025
      If the screen display on your LG Monitor is unstable and shaky, or if images leave shadow trails, and the resolution is set to HDMI 1080i 60/50 Hz (interlaced), the screen may be flickering. Try changing the resolution to 1080p or the recommended resolution. In addition, 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. The setting methods may be different depending on the computer or operating system, and some resolutions may not be available depending on the performance of the graphics card. If this is the case, contact the manufacturer of the computer or graphics card for assistance.
  • H
    Heather WebbAug 13, 2025
    What to do if my LG Monitor says "Unrecognized monitor, Plug and Play (VESA DDC) monitor found"?
    • B
      Brandon BakerAug 13, 2025
      If you see an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message on your LG Monitor, be sure to install the display driver from the LG website: http://www.lg.com. Also, make sure to check if the graphics card supports the Plug and Play function.
  • S
    Scott HudsonAug 18, 2025
    Why are some functions not available when I press the Menu button on my LG Monitor?
    • C
      coxshellyAug 18, 2025
      If some functions are not available when you press the Menu button on your LG Monitor, it might be because the OSD is locked. To resolve this, disable OSD Lock in the General settings.
  • T
    Tanya BeckAug 22, 2025
    Why does image sticking occur on my LG 27UN850 even when it's off?
    • P
      Paula NelsonAug 22, 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.

Summary

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

Installing the Wall Mount Plate

Installing on the Wall

Guide for mounting the monitor on a wall with specific spacing.

USING THE MONITOR

Connecting to a PC

How to connect the monitor to a computer for display.

HDMI Connection

DisplayPort Connection

USB-C connection

Connecting Peripherals

USER SETTINGS

Activating the Main Menu

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

Main Menu Features

Quick Settings

Adjustments for brightness, contrast, volume, and color temperature.

Input Settings

Picture Settings

Options to customize display modes like Vivid, Cinema, FPS, and color settings.

Picture Adjust

Color Adjust

Sound Settings

TROUBLESHOOTING

Nothing is displayed on the screen

Checks power and cable connections for display issues.

Is the No Signal message being displayed?

Troubleshooting steps for missing or disconnected signal cables.

Is the Out of Range message being displayed?

Addresses issues with PC signal frequencies outside monitor range.

Screen display is unstable and shaky.; Images displayed on the monitor leave shadow trails.

Resolves flickering or image trail issues related to resolution or graphics card.

Does image sticking occur even when the monitor is turned off?

Unrecognized Monitor Message

Resolves "Unrecognized monitor" messages by checking display drivers.

No Sound from Headphone Port

PRODUCT SPECIFICATION

LG 27UN850 Specifications

General IconGeneral
Screen Size27 inches
Resolution3840 x 2160 (4K UHD)
Panel TypeIPS
Aspect Ratio16:9
Refresh Rate60 Hz
Response Time5 ms (GtG)
Color Support1.07 billion colors
HDRHDR10
Ports2 x HDMI, 1 x DisplayPort
USB Ports2 x USB 3.0
VESA Mount100 x 100 mm
Contrast Ratio1000:1
Color GamutDCI-P3 95%
SpeakersYes, 2 x 5W
Viewing Angle178° (H) / 178° (V)
Brightness350 cd/m²
USB-C1 x USB-C
Stand AdjustmentsTilt, Pivot, Height

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