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LG 27MP400 - User Manual

LG 27MP400
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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.
OWNER’S MANUAL
LED LCD MONITOR
(LED Monitor*)
www.lg.com
Copyright © 2022 LG Electronics Inc. All Rights Reserved.
22MP400
24MP400
27MP400
24MP40B
24MP44B
22MP410
22MP41W
27MP40W
27MP41D
24MP40A
27MP40A
22BP410
22MP410P
22MP400P
24MP400P
27MP400P

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Questions and Answers

  • P
    patrick62Aug 15, 2025
    How to fix LG 27MP400 Monitor when no image appears?
    • K
      Katie SchneiderAug 15, 2025
      If no image appears on your LG Monitor, first, ensure the power cord is correctly connected to the power outlet. Also, check the signal cable between your PC and the monitor to make sure it's properly connected. If the signal from the PC is out of the display's frequency range, consult the 'Specifications' section of the manual to reconfigure your display. You can unlock the OSD controls by entering the OSD lock menu and changing items to off. Verify the frequency or resolution settings in Control Panel - Display - Settings and readjust the video card to the recommended resolution, if necessary. Selecting the recommended resolution is crucial; otherwise, the screen may appear blurred, dimmed, truncated, or biased. If problems persist, consult the computer or video card manufacturer.
  • T
    Tyler WilliamsAug 18, 2025
    What to do if no image appears on my LG 27MP400 Monitor?
    • M
      Michele HopkinsAug 18, 2025
      First, verify that the power cord is properly connected to the power outlet. Also, check the signal cable between your PC and the monitor, ensuring it's securely connected. If the signal from your PC is out of the display's frequency range, consult the 'Specifications' section of the manual to configure your display accordingly.
  • R
    Roberta WillisAug 21, 2025
    How to fix an LG Monitor when no image appears?
    • T
      Tabitha HolmesAug 21, 2025
      First, ensure the power cord is correctly connected to the power outlet. If that's not the issue, check the signal cable between your PC and the monitor to make sure it's properly connected. If the signal from the PC is out of the display's frequency range, consult the 'Specifications' section of the manual and configure your display. Also, you can unlock the OSD controls by going to the OSD lock menu and setting the items to 'off'.
  • V
    vpriceAug 25, 2025
    Why does my LG 27MP400 show 'No image appears'?
    • S
      Steven ThomasAug 26, 2025
      The 'No image appears' message on your LG Monitor might be due to a few reasons. It could be that the power cord isn't properly connected to the outlet. Another reason might be a missing or disconnected signal cable between the PC and the monitor; in this case, check the cable and reconnect it. The signal from your PC might be out of the horizontal or vertical frequency range of the display. You can unlock the OSD controls at any time by entering the OSD lock menu and changing items to off.
  • R
    Ruben JohnsonAug 28, 2025
    Why does my LG 27MP400 display 'No Image'?
    • M
      Mr. Charles MendezAug 28, 2025
      There are several reasons why your LG Monitor might not be displaying an image: * Ensure the power cord is properly connected to the power outlet. * The signal cable between your PC and the monitor may be missing or disconnected; check the cable and reconnect it. * The signal from the PC (video card) might be out of the horizontal or vertical frequency range of the display. Refer to the 'Specifications' section of this manual and configure your display again. * The OSD controls may be locked. You can unlock them by entering the OSD lock menu and changing items to 'off'.
  • B
    Brandon LeeAug 31, 2025
    What to do if display image is incorrect on LG 27MP400 Monitor?
    • S
      sarah81Aug 31, 2025
      If the display image on your LG Monitor is incorrect, ensure the signal cable is properly connected, tightening it with a screwdriver if needed. Also, make sure the video card is correctly inserted in its slot. Set the color setting higher than 24 bits (true color) via Control Panel - Settings. If the screen is set to interlace mode, change it to the recommended resolution. It's recommended to install the display driver from the LG website. Verify that your video card supports Plug&Play. If the selected resolution is HDMI 1080i 60/50 Hz, change it to the recommended resolution of 1080P.
  • P
    Patrick ParksSep 3, 2025
    How to fix no image on my LG 27MP400?
    • R
      Richard RogersSep 3, 2025
      If no image appears on your LG Monitor, first ensure the power cord is properly connected to the power outlet. Also, check the signal cable between the PC and the monitor to make sure it is securely connected. If the OSD controls are locked, you can unlock them by entering the OSD lock menu and changing the settings to 'off'. Finally, if the signal from your PC is out of the display's frequency range, consult the 'Specifications' section of the manual to configure your display.
  • P
    Phillip LeblancSep 7, 2025
    Why is the display image incorrect on my LG 27MP400?
    • P
      Paul SimmonsSep 7, 2025
      An incorrect display image on your LG Monitor can stem from several factors. Ensure the signal cable is properly connected, fastening it with a screwdriver if needed. Confirm the video card is correctly inserted. Adjust the color setting to higher than 24 bits (true color) in Control Panel settings. If the screen is in interlace mode, switch to the recommended resolution. If the selected resolution is HDMI 1080i 60/50 Hz, change the resolution to the recommended 1080P.
  • L
    lisasmithSep 12, 2025
    What to do if the LG 27MP400 Monitor display image is incorrect?
    • D
      Devin FordSep 12, 2025
      If your LG Monitor's display image is incorrect, start by checking the signal cable for a secure connection, tightening it with a screwdriver if needed. Also, ensure your video card is properly inserted in its slot. Then, set the color setting higher than 24 bits (true color) via Control Panel settings. If the screen is in interlace mode, switch to the recommended resolution. Change the resolution to the recommended resolution 1080P.

Summary

ASSEMBLING AND PREPARING

Supported Drivers and Software

Download and install the latest drivers and software from the LG website.

Product and Button Description

Moving and Lifting the Monitor

Instructions for safely moving and lifting the monitor to prevent damage.

Joystick Button Operation

How to use the joystick button to control monitor functions and navigate menus.

Installing on a Table

Adjusting the Angle

Guide on how to adjust the monitor screen angle for comfortable viewing.

Using the Kensington Lock

Installing the Wall Mount Plate

Specifications and steps for mounting the monitor to a wall using a plate.

Installing on the Wall

Guidelines for securely installing the monitor on a wall for ventilation and safety.

USING THE MONITOR

Connecting to a PC

How to connect the monitor to a computer using various input methods.

HDMI Connection for PC

Connecting AV Devices

HDMI Connection for AV

USER SETTINGS

Activating the Main Menu

Menu Settings Overview

Customizing Settings

Picture Mode Settings

Picture Mode Options

Picture Adjustments

Brightness, Contrast, and Sharpness

SUPER RESOLUTION+ and Black Level

Game Adjustments

Response Time and FreeSync

Optimizing response time and enabling FreeSync for gaming.

Black Stabilizer and Crosshair

Enhancing dark scene visibility and adding in-game crosshairs.

Color and Configuration Adjustments

Gamma, Color Temp, and RGB

General Settings

TROUBLESHOOTING

No Image or Signal Issues

Solutions for no image, "Out of Range", or "NO SIGNAL" messages.

OSD Control Problems

Troubleshooting difficulties in accessing or controlling OSD menu functions.

Display Image Anomalies

Resolving issues with abnormal colors, blinking, or incorrect resolution.

Monitor Recognition and Flickering

Addressing recognition issues and screen flickering problems.

LG 27MP400 Specifications

General IconGeneral
Pixel pitch0.3114 x 0.3114 mm
Screen shapeFlat
Display diagonal27 \
Anti-glare screenYes
Display technologyLED
Native aspect ratio16:9
Maximum refresh rate75 Hz
Contrast ratio (typical)1000:1
Display number of colors16.7 million colors
Display diagonal (metric)68.6 cm
Display brightness (typical)250 cd/m²
Headphone outNo
Panel mounting interface75 x 75 mm
Energy efficiency scaleA to G
Power consumption (max)26 W
Power consumption (standby)0.3 W
Power consumption (typical)22 W
AMD FreeSync typeFreeSync
Product colorBlack
Market positioningHome
Bundled softwareOnScreen Control (LG Screen Manager)
Package typeBox
Package depth450 mm
Package width678 mm
Package height158 mm
Package weight5200 g
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)190 mm
Width (with stand)612 mm
Height (with stand)454.9 mm
Weight (with stand)3400 g
Depth (without stand)56.2 mm
Height (without stand)362.5 mm
Weight (without stand)3100 g

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