Table of Contents

  1. Display not turning on
  2. No signal
  3. Flickering screen
  4. Color issues
  5. Distorted image
  6. Frequently Asked Questions (FAQs)

1. Display not turning on

If your LG 38-Inch UltraWide monitor is not turning on, try the following troubleshooting steps:

Check the power source and cables

  • Ensure the power cable is securely connected to both the monitor and a functioning power outlet.
  • Double-check that the power switch on the monitor is turned on.
  • If using an external power adapter, make sure it is also plugged in correctly.

Test with a different power cable and outlet

  • Try using a different power cable to rule out cable issues.
  • Plug the monitor into a different power outlet to verify if the outlet is causing the problem.

Reset the monitor

  • Press and hold the power button on the monitor for about 10 seconds to perform a hard reset.
  • Release the power button and wait a few moments before pressing it again to turn on the monitor.

2. No signal

If your LG 38-Inch UltraWide monitor is not receiving any signal, follow these steps:

Check the video input source

  • Ensure that the correct video input source is selected on the monitor.
  • Press the "Input" or "Source" button on the monitor or use the monitor's menu to select the appropriate input source.

Inspect the video cable connections

  • Ensure the video cable is securely connected to both the monitor and the computer or other video source.
  • Try using a different video cable to rule out cable issues.

Update graphics drivers

  • Visit the manufacturer's website of your graphics card and download the latest drivers.
  • Install the updated drivers and restart the computer.

3. Flickering screen

If your LG 38-Inch UltraWide monitor has a flickering screen, try the following solutions:

Adjust the refresh rate

  • Right-click on the desktop and select "Display settings" (Windows) or "System Preferences" (Mac).
  • Under the display settings, adjust the refresh rate to a lower value and check if the flickering stops.

Check for electromagnetic interference

  • Move any electronic devices that may be causing interference away from the monitor.
  • Ensure there are no power cables or other wires lying near the monitor that could be inducing interference.

Update firmware

  • Visit the LG website and search for your monitor model.
  • Download the latest firmware update for your monitor and follow the provided instructions to update it.

4. Color issues

If your LG 38-Inch UltraWide monitor has color-related problems, try the following fixes:

Adjust color settings

  • Access the monitor's menu and navigate to the color settings.
  • Experiment with different color presets or manually adjust the RGB values to achieve the desired colors.

Calibrate the monitor

  • Use built-in calibration tools on your operating system or consider using third-party calibration software to fine-tune color accuracy.
  • Follow the step-by-step instructions provided by the calibration tools to ensure accurate color representation.

Check the cable integrity

  • Ensure the video cable is not damaged or frayed.
  • Try using a different video cable to rule out cable-related color issues.

5. Distorted image

If your LG 38-Inch UltraWide monitor is displaying a distorted image, try these troubleshooting steps:

Change screen resolution

  • Right-click on the desktop and select "Display settings" (Windows) or "System Preferences" (Mac).
  • Adjust the screen resolution to match the recommended resolution for your monitor.
  • Apply the changes and check if the distorted image is resolved.

Check cable connections

  • Ensure the video cable is securely connected to both the monitor and the computer.
  • Inspect the cable for any visible damage or loose connections, and replace if necessary.

Update graphics drivers

  • Visit the manufacturer's website of your graphics card and download the latest drivers.
  • Install the updated drivers and restart the computer.

Frequently Asked Questions (FAQs)

  1. How do I reset my LG 38-Inch UltraWide monitor to factory settings?

    To reset your LG monitor to factory settings, go to the monitor's menu, navigate to the "Reset" or "Factory Reset" option, and select it. Confirm the reset when prompted, and the monitor will revert to its original settings.

  2. Why does my LG UltraWide monitor have black bars on the sides?

    Black bars on the sides of the screen typically occur when the screen aspect ratio does not match the content being displayed. Adjust the display settings on your computer or in the application to match the aspect ratio of the monitor (21:9 for LG UltraWide), and the black bars should disappear.

  3. Can I connect multiple devices to my LG 38-Inch UltraWide monitor?

    Yes, you can connect multiple devices to your LG UltraWide monitor. It usually has multiple video input ports (such as HDMI and DisplayPort) that allow you to connect multiple devices simultaneously. Use the monitor's input selection menu to switch between the connected devices.


This guide should help you troubleshoot and resolve common display issues with your LG 38-Inch UltraWide monitor. If you continue to experience problems, we recommend contacting LG customer support for further assistance.

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