LG OLED Monitor Owner's Manual

Getting Started: Assembly and Preparation

Important Safety Information

• Always use genuine LG components for safety and performance.
• Do not apply foreign substances to screw parts.
• Avoid excessive force when tightening screws to prevent damage.
• Do not carry the monitor upside down by the base to avoid falls.
• Do not touch the screen when lifting or moving to prevent damage.

Moving and Lifting the Monitor

• Use original packaging or packing material.
• Disconnect the power cord and all other cables before moving.
• Hold the bottom and side of the monitor frame firmly; do not hold the panel itself.
• Keep the screen facing away from you to prevent scratches.
• Avoid shock and excessive vibration during transport.
• Keep the monitor upright; never turn it on its side or tilt it.
• Avoid touching the monitor screen to prevent damage to the screen or pixels.

Installing on a Table

• Place the monitor upright on a table.
• Ensure at least 100 mm (3.9 inches) of clearance from the wall for ventilation.
• Use the provided power cord and connect to a grounded power outlet.

Using the Kensington Lock

• An optional security system to connect the monitor to a table.
• Refer to the Kensington lock owner's manual or http://www.kensington.com for installation and usage details.

Installing on the Wall

• The monitor supports VESA-compatible wall mounts.
• Install at least 100 mm (3.9 inches) from the wall and with 100 mm (3.9 inches) side clearance for ventilation.
• Use VESA standard screws (e.g., M4 x L10 for 100x100mm mount).
• The maximum screw length from the back of the monitor must be 8 mm (0.3 inches).
• The wall mount bracket is optional.
• Ensure the bracket is securely fixed to the monitor and the wall.
• Remove the stand before wall mounting by reversing the stand attachment process.
• Caution: Unplug the power cord before installation to avoid electric shock.

Product and Button Description

Joystick Button

Located on the back of the monitor, the joystick button allows for easy control of monitor functions.

• Power On: Press the joystick button once.
• Power Off: Press and hold the joystick button for more than 5 seconds.
• Volume Control: Move the joystick button left or right.
• Accessibility Menu: Press to enter the [Accessibility] menu.

Using the Monitor

Connecting to a PC

• HDMI: Transmits digital video and audio signals. Recommended: Ultra High Speed HDMI cable.
• DisplayPort: Transmits digital video and audio signals. Use a Mini DP to DP cable if your graphics card has a Mini DisplayPort output.
• USB-C: Transmits digital video and audio signals. Supports PD (Power Delivery) and DP Alternate Mode. Note: The USB-C port is for PC power, not monitor power; use an adapter for monitor power.

Connecting AV Devices

• HDMI: Transmits digital video and audio signals from AV devices.

Connecting Peripherals

• USB Device Connection: The USB port functions as a hub. Connect peripherals like keyboards, mice, or USB drives to the USB IN port. To use the monitor's downstream USB ports, connect the monitor's upstream port to your PC using a USB-C-C or USB-C-A cable.
• Headset Connection: Connect headphones or headsets to the headset port. The microphone function requires the USB port on the monitor to be connected to the PC's USB port.

User Settings

Activating the Main Menu

Press the joystick button on the back of the monitor. Navigate options using the joystick.

Main Menu Features

• Power Off: Turns off the monitor.
• Input: Selects the input mode. Can be customized to joystick buttons for quick access.
• Game Mode: Optimizes settings for gaming. Can be customized.
• Exit: Closes the main menu.
• Settings: Accesses detailed screen configuration options.

Menu Settings Overview

Access the OSD menu by pressing the joystick button and selecting [Settings]. Navigate with the joystick.

• [Game Adjust]:
  • Game Mode: Selects picture modes optimized for games (e.g., Personalized Picture, Gamer 1/2, FPS, RTS, Vivid, Reader, HDR Effect, sRGB, DCI-P3, Color Weakness, Calibration 1/2).
  • Adaptive-Sync/VRR: Reduces screen tearing and stuttering in games. Supported via DisplayPort, USB-C, and HDMI. Requires a compatible graphics card (NVIDIA G-SYNC or AMD FreeSync) and updated drivers.
  • Black Stabilizer: Adjusts black contrast for better visibility in dark scenes.
  • Crosshair: Displays an on-screen aiming aid for FPS games.
  • FPS Counter: Shows the current frame rate. Cannot be used simultaneously with Crosshair.
  • Game Reset: Resets game-specific settings to default.
• [Picture Adjust]:
  • Adjust Brightness, Peak Brightness, Contrast, Sharpness, and Gamma (Modes 1-4).
  • Configure Color Temperature (Custom, Warm, Medium, Cool, Manual) and R/G/B color values.
  • Six Color adjustments for Hue and Saturation of Red, Green, Blue, Cyan, Magenta, and Yellow.
  • Set Black Level (High/Low) for HDMI input.
  • Picture Reset restores default picture and color settings.
• [Sound]:
  • Select Sound Out (Headphone/Internal Speaker).
  • Configure DTS Headphone:X for immersive 3D sound (Game, Entertainment, Sports, Off).
  • Enable DepthSound for enhanced low-frequency audio.
  • Adjust Volume level.
• [Input]:
  • Select Input List (HDMI 1/2, DisplayPort, USB-C).
  • Adjust Aspect Ratio (Full Wide, Original, Just Scan).
  • Enable Auto Input Switch to automatically change to a new input source.
  • Configure PBP/PIP (Picture-by-Picture/Picture-in-Picture) settings: Size, Position, Screen Switch, and Sound Switch.
• [General]:
  • Set Menu Language.
  • Utilize OLED protection features: OLED Screen Move, OLED Screen Saver, OLED Image Cleaning to prevent image retention.
  • Configure USB-C Option for High Resolution or High Data Speed.
  • Set Hexagon Lighting effects (Static colors, Cycling, Off).
  • Customize User-defined Keys for quick access to preferred menus.
  • Enable SMART ENERGY SAVING for power conservation.
  • Configure Deep Sleep Mode and Automatic Standby.
  • Set Input Compatibility Version.
  • Enable/Disable Buzzer sound.
  • Activate OSD Lock to prevent menu adjustments (except Brightness, Contrast, Volume, Input).
  • Run Screen Self-diagnosis and Sound Self-diagnosis.
  • View Information (Total Power On Time, Resolution).
  • Access Open Source Software License details.
  • Reset to Initial Settings.

Important Information for Preventing Image Retention

OLED pixels emit their own light, offering perfect blacks and clear images. While image retention is uncommon in normal use, it can occur if static images are displayed for extended periods. Features like OLED Screen Move, OLED Screen Saver, and OLED Image Cleaning are built-in to protect the screen. Examples of static images include desktop icons, fixed menus, or broadcast logos. It is recommended to use the OLED protection features found in the [General] settings.

Safety Precautions for Prolonged Use

Due to the nature of OLED panels, brightness may permanently decrease with prolonged use. Avoid operating the monitor in high temperatures, high humidity, or with prolonged static images or high luminance, as this may lead to afterimages, image blurring, or screen malfunction.

Product Specifications

General

• Color Depth: 8-bit / 10-bit supported.
• Operating Conditions: 0°C to 40°C (32°F to 104°F), less than 80% humidity.
• Storing Conditions: -20°C to 60°C (-4°F to 140°F), less than 85% humidity.
• AC/DC Adapters: Models AD10660LF, ADS-270RLD-20-1 200270E.

Model 39GX900A

• Dimensions (W x H x D): With Stand: 887.8 x 605.7 x 322.8 mm (34.9 x 23.8 x 12.7 in); Without Stand: 887.8 x 404.4 x 198.0 mm (34.9 x 15.9 x 7.7 in).
• Weight: With Stand: 11.4 kg (25.1 lbs); Without Stand: 7.3 kg (16.0 lbs).

Model 34GX900A

• Dimensions (W x H x D): With Stand: 784.1 x 580.4 x 291.8 mm (30.8 x 22.8 x 11.4 in); Without Stand: 784.1 x 358.3 x 167.1 mm (30.8 x 14.1 x 6.5 in).
• Weight: With Stand: 10.4 kg (22.9 lbs); Without Stand: 6.2 kg (13.6 lbs).

Supported Timings

The manual lists supported resolutions and refresh rates for HDMI, DisplayPort, and USB-C connections, including standard video timings.

• Max Resolution: 3440 x 1440 @ 240 Hz
• Recommended Resolution: 3440 x 1440 @ 240 Hz

Troubleshooting

Common issues and solutions:

• No display: Check power cord, ensure monitor is on, verify correct input selection, and check computer status.
• Unstable/shaky display or shadow trails: Ensure the recommended resolution and frequency are selected. Not using optimal settings may cause blurred text or display misalignment.
• [No Signal] message: Verify the signal cable is properly connected between the PC and monitor.
• [Out of Range] message: The PC signal is outside the monitor's supported frequency range. Adjust PC graphics card settings to a supported frequency.
• Unrecognized monitor message: Install the correct display driver from the LG website (www.lg.com).
• Disabled features: Check if OSD Lock is enabled in the [General] settings.
• No sound from headset port: Ensure headset connections are secure, volume is up, and PC audio output is set to the monitor. Microphone requires USB connection to the PC.

License and Warranty Information

Licenses

• Trademarks include HDMI, SuperSpeed USB Trident, DTS, VESA, and USB Type-C.
• Open Source Software: Source code information is available at https://opensource.lge.com.

Limited Warranty (USA & Canada)

Full warranty terms are available at https://www.lg.com/us and https://www.lg.com/ca_en/. This warranty includes a binding arbitration clause for dispute resolution, meaning disputes are settled through arbitration rather than court, and class actions/jury trials are not permitted (unless prohibited by law or you opt out). Consumers in Ontario and Quebec, Canada, have specific protections under provincial law.

Opt-Out Procedure: To opt out of the arbitration clause, send notice to LG within 30 calendar days of purchase via email to optout@lge.com (subject: "Arbitration Opt Out") or by calling 1-800-980-2973. Provide your name, address, purchase date, model number, and serial number. Opting out does not affect warranty coverage.