LG 27MP55HQ - User Manual

Questions and Answers

G
Gregory ZimmermanSep 23, 2025
How to unlock the OSD on my LG 27MP55HQ?
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  Brittney MartinezSep 23, 2025
  You can unlock the OSD controls on your LG Monitor at any time by pushing the MENU button for several seconds until the message “OSD UNLOCKED” appears.
M
Molly NicholsAug 25, 2025
How to stop my LG 27MP55HQ screen from blinking?
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  Colleen HansonAug 25, 2025
  To stop your LG Monitor screen from blinking, check if the screen is set to interlace mode. If it is, change it to the recommended resolution.
S
Suzanne WilliamsAug 25, 2025
What to do if my LG 27MP55HQ screen is flickering?
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  Brandon DelgadoAug 26, 2025
  If your LG Monitor screen is flickering, check if the screen is set to interlace mode. If it is, change it to the recommended resolution.
B
Brittney MuellerAug 27, 2025
What to do if no image appears on my LG 27MP55HQ?
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  Jerry CrawfordAug 27, 2025
  If no image appears on your LG Monitor, try these steps: Ensure the power cord is properly connected to the outlet, press the Power button, adjust the brightness and contrast settings. If the display is in power saving mode, move the mouse or press a key. Also, verify that your PC is turned on. If a message appears indicating the signal from the PC is out of range, consult the 'Specifications' section of the manual to configure your display. Note that the monitor enters DPM mode if it's on "No-Signal" for 5 minutes.
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ojonesAug 27, 2025
What to do if display image is incorrect on LG 27MP55HQ Monitor?
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  Robert HerreraAug 27, 2025
  If your LG monitor's display image is incorrect, press the AUTO button to automatically adjust the image to the ideal setting. Also, check Control Panel ? Display ? Settings and adjust the display to the recommended resolution, ensuring the color setting is higher than 24 bits (true color).
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James MartinSep 15, 2025
How to unlock OSD on LG 27MP55HQ if it is locked?
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  owhiteSep 15, 2025
  If you see an "OSD LOCKED" message on the screen of your LG Monitor, you can unlock the OSD controls by pushing the MENU button for several seconds until the message “OSD UNLOCKED” appears.
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mknightSep 12, 2025
What to do if my LG 27MP55HQ Monitor shows "Unrecognized monitor, Plug&Play (VESA DDC) monitor found"?
- S
  Sarah BrightSep 12, 2025
  If your LG Monitor displays the message "Unrecognized monitor, Plug&Play (VESA DDC) monitor found", install the display driver from the CD (or diskette) that came with your display. Also, verify that your video card supports the Plug&Play function.
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Nicole ClarkSep 14, 2025
How to fix the screen color if it is mono or abnormal on my LG 27MP55HQ?
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  David RobertsonSep 14, 2025
  If the screen color on your LG Monitor appears mono or abnormal, check that the signal cable is properly connected, tightening it with a screwdriver if necessary. Also, ensure that the video card is correctly inserted in its slot. Finally, verify that the color setting is set higher than 24 bits (true color) in the Control Panel settings.
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jacobwhiteSep 5, 2025
Why does my LG 27MP55HQ Monitor screen blink?
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  carlamooreSep 5, 2025
  If the screen of your LG Monitor blinks, check if the screen is set to interlace mode. If it is, change it to the recommended resolution.
T
Timothy BruceSep 2, 2025
How to fix horizontal noise on LG Monitor?
- Z
  Zachary GlennSep 3, 2025
  If any horizontal noise appears in any image or characters are not clearly portrayed on your LG Monitor, first, press the AUTO button to automatically adjust your display image to the ideal setting. If the issue persists, go to Control Panel ? Display ? Settings and adjust the display to the recommended resolution or adjust the display image to the ideal setting. Also, ensure that the color setting is higher than 24 bits (true color).

Summary

Owners Manual and Model Information

Assembling and Preparing

Attaching and Detaching Stand Base

Step-by-step guide on attaching and removing the stand base from the monitor.

Wall Mounting Specifications

Instructions and specifications for wall-mounting the monitor using VESA standards.

Using the Monitor Set

Connecting to a PC

Explains how to connect the monitor to a PC using D-SUB and HDMI connections.

Connecting to AV Devices

Customizing Settings

General Menu Settings

Overview of general menu settings like Brightness, Contrast, Response Time, and Wide/Original modes.

Picture Settings

Color Settings

Super Energy Saving Function

Picture Mode Presets

Troubleshooting

Common Image and OSD Issues

Provides solutions for common problems like no image, OSD lock, and incorrect display.

Advanced Display and Connectivity Issues

Specifications

22 MP55 HQ Specifications

Detailed technical specifications for the 22MP55HQ model.

23 MP55 HQ Specifications

Detailed technical specifications for the 23MP55HQ model.

24 MP55 HQ Specifications

Detailed technical specifications for the 24MP55HQ model.

27 MP55 HQ Specifications

Detailed technical specifications for the 27MP55HQ model.

LG 27MP55HQ Specifications

General

Screen Size	27 inches
Resolution	1920 x 1080
Panel Type	IPS
Aspect Ratio	16:9
Brightness	250 cd/m²
Response Time	5 ms
Refresh Rate	60 Hz
Ports	HDMI, D-Sub
Contrast Ratio	1000:1
Dynamic Contrast Ratio	5, 000, 000:1
Viewing Angle (H/V)	178°/178°
Color Depth	8 bits
Color Gamut	72% NTSC