LG OLED Monitor Owner's Manual

Introduction

This manual provides essential information for operating your LG OLED Monitor. Please read it carefully before use and keep it for future reference.

You can download the full manual, including installation, usage, troubleshooting, specifications, and license information, from the LG website. The USER GUIDE is also embedded within the product.

Important Precautions

Please read these safety precautions carefully before using the product. Failure to follow these warnings may result in death, serious injury, or damage to the product or other property.

Precautions for AC Adapter and Electrical Power

• Disconnect the power cord immediately if water or foreign substances enter the product, power cord, or AC adapter to prevent fire or electric shock.
• Do not touch the power plug or AC adapter with wet hands. Ensure pins are dry before use.
• Ensure the power cord is fully inserted into the AC adapter to prevent fire or electric shock from poor connection.
• Use only LG Electronics-provided or approved power cords and AC adapters to avoid fire or electric shock.
• Pull the power cord by the plug when unplugging; do not bend it excessively to prevent damage and potential shock or fire.
• Avoid placing heavy objects or sharp objects on the power cord or AC adapter to prevent damage, which could cause fire or electric shock.
• Never disassemble, repair, or modify the power cord or AC adapter.
• Use only the supplied power cord or an authorized alternative to prevent fire, electrical shock, or product damage.
• Use a properly grounded plug and receptacle to avoid electrocution, injury, or product damage.
• Do not use a damaged or loose plug, as it may cause electrical shock or fire.
• Operate the display only from the indicated power source voltage to prevent damage, fire, or electrocution. Consult a certified electrician if unsure.
• Never touch the power cord or signal cable during thunder and lightning to avoid electric shock.
• Do not connect multiple extension cords, appliances, or heaters to a single outlet. Use a power bar with a grounding terminal for computers to prevent overheating and fire.
• If the product will not be used for a long time, unplug the power cable to prevent dust accumulation causing fire or insulation deterioration leading to leakage, shock, or fire.
• Ensure the power plug is firm to prevent fire from loose connections.
• Do not insert metal or conductive materials into product openings, and avoid touching the power cable immediately after plugging it in.
• The AC Plug serves as the disconnecting device and should be easily accessible.
• Ensure the device is installed near an easily accessible wall outlet.
• Keep the outlet, AC adapter, and plug pins clean from dust to prevent fire.
• Do not unplug the power cord while the product is in use, as electrical shock can damage the product.
• The unit remains connected to AC power even when turned off, as long as it is plugged into the wall outlet.

Precautions in Installing the Product

• Keep away from heat sources like heaters or open flames to prevent electrical shock, fire, malfunction, or deformation.
• Keep packing materials (anti-moisture, vinyl) out of reach of children. Anti-moisture material is harmful if swallowed; vinyl packing can cause suffocation.
• Do not place heavy objects on the product or sit on it to avoid injury from collapse or drops. Children require particular attention.
• Do not leave power or signal cables where someone can trip over them, as this can cause electrical shock, fire, product breakdown, or injury.
• Install the product in a neat, dry place, away from water, as dust or moisture can cause electrical shock, fire, or product damage.
• Do not add accessories not designed for this display.
• If you smell smoke, other odors, or hear strange sounds, unplug the power cord and contact LG Customer Service to prevent electrical shock or fire.
• If the product is dropped or the case is broken, turn it off and unplug the power cord. Contact LG Customer Service to prevent electrical shock or fire.
• Do not drop objects on or impact the product, and do not throw toys at it, as this can cause injury, product problems, or display damage.
• Keep out of reach of children and do not place toys near the product.
• Ensure ventilation holes are not blocked. Install the product more than 10 cm (3.9 inches) from the wall to prevent deformation or fire due to internal heat buildup.
• Do not cover the product with cloth or other material while plugged in to prevent deformation or fire due to overheating.
• Place the product on a flat, stable surface large enough to support it to prevent injury or breakage if dropped.
• Install the product where no Electromagnetic Interference occurs.
• Keep the product away from direct sunlight to prevent damage.
• Do not place the product on the floor where small children or others may trip over it.
• Do not install on a wall exposed to oil or oil mist, as this may damage the product and cause it to fall.
• For glossy bezels, consider placement to avoid disturbing reflections from surrounding light and surfaces.

Precautions in Moving the Product

• Turn off the product before moving to prevent electrocution or damage.
• Remove all cables before moving to prevent electrocution or damage.
• Do not hold the product by the stand only when lifting or moving; hold it by the frame to prevent it from falling and causing damage or injury.
• Do not shock the product when moving it to prevent electrocution or damage.
• Move the product with both hands, ensuring the panel faces forward, to prevent damage or injury from dropping.
• Do not place the product face down to avoid damaging the TFT-LCD screen.

Precautions in Using/Cleaning the Product

• Do not attempt to disassemble, repair, or modify the product yourself; fire or electric shock may occur. Contact LG Customer Service for repairs.
• When cleaning, unplug the power cord and gently scrub with a soft cloth. Do not use wet cloths or spray liquids directly onto the product, as this may cause electric shock. Avoid chemicals like benzene, paint thinners, or alcohol.
• Keep the product away from water to prevent fire or electric shock accidents.
• Avoid high temperatures and humidity.
• Do not place or store flammable substances near the product due to explosion or fire danger.
• Keep the product clean at all times.
• Maintain a comfortable and natural working position.
• Take regular breaks when working with the product for extended periods.
• Do not press the panel with a hand or sharp object (nail, pencil, pen) to avoid scratches.
• Maintain a proper distance from the product and rest periodically to prevent vision impairment.
• Set the appropriate resolution as per the User's Guide.
• Keep small accessories out of children's reach.
• Displaying a still image for a long time may cause persistent image or stain on the screen. Use a screen saver and power off when not in use. Persistent image or stain from long usage is not covered by warranty.
• Do not use high-voltage products (e.g., Electrical Swatter) near the monitor, as it may cause malfunction due to electrical shock.
• Spray water onto a soft cloth 2-4 times and wipe the front frame in one direction. Excessive moisture may cause staining.

Installation

Lifting and Moving the Monitor

• It is recommended to move the monitor in its original packaging.
• Disconnect the power cord and all cables before moving or lifting.
• Hold the monitor with the screen facing away from you to avoid damage.
• Grip the side and bottom of the monitor frame firmly. Avoid holding the transparent part, speaker, or speaker grill area.
• At least two people are recommended for transporting large monitors.
• Avoid jolts or excessive vibration during transport.
• Keep the monitor upright; never turn it on its side or tilt it.
• Do not apply excessive pressure that could flex or bend the frame chassis, as this may damage the screen.
• Be careful not to damage protruding buttons when handling.
• Avoid touching the screen at all times.
• When attaching the stand, place the screen face down on a cushioned surface to protect it from scratches.

Installing on a Table

• Lift the monitor and place it upright on the table.
• Position the monitor at least 100 mm (3.9 inches) away from the wall for sufficient ventilation.
• Unplug the power cord before moving or installing to avoid electric shock.
• Use the provided power cord and connect it to a grounded outlet.
• Contact your dealer for a replacement power cord.

Adjusting the Angle

The screen angle can be adjusted forward/backward (-8° to 15°) and left/right (30°). Do not hold the lower part of the frame or press the screen while adjusting to avoid injury or damage.

Adjusting the Stand Height

Hold the monitor with both hands. The height can be adjusted up to 110.0 mm (4.3 inches). Do not place hands on the stand while adjusting height to avoid injury.

Using the Kensington Lock

Connect the monitor to a table using a Kensington security system cable (optional). Refer to the Kensington lock owner's manual or visit http://www.kensington.com for details.

Installing on the Wall

The monitor supports VESA wall mount plates or compatible devices. Install at least 100 mm (3.9 inches) from the wall and allow 100 mm (3.9 inches) clearance on each side for ventilation.

Installing the Wall Mount Plate

Attach a wall mounting bracket (optional) securely to the back of the monitor and the wall. Use VESA standard screws (e.g., M4 x L10 for 100x100mm mounting). Consult the wall mount kit's installation guide for specifics. Ensure screws are not longer than 8 mm (0.3 inches) from the back of the monitor to prevent internal damage. Unplug the power cord before installation. Use authorized LG wall mounts and qualified personnel for ceiling or slanted wall installations. Excessive force when tightening screws may cause damage not covered by warranty.

Connections

Connect various external devices to your monitor. Change the input mode to select the desired device.

This monitor supports Plug and Play: the PC recognizes attached devices without manual configuration.

If the monitor is turned on in a cold environment, the screen may flicker; this is normal.

Avoid pressing the screen with your finger for extended periods, as this may cause temporary distortion.

To prevent image retention, avoid displaying static images for long periods. Use a screensaver.

Wireless communication devices near the monitor can affect the image.

For optimal connection, HDMI cables and USB devices should have bezels less than 10 mm (0.39 inches) thick and 18 mm (0.7 inches) width.

HDMI Connection

Transmits digital video and audio signals. Ensure the product and external devices are off and unplugged before connecting HDMI cables. Supported audio formats include Dolby Digital/Plus and PCM. Use certified Ultra High Speed HDMI cables (shorter than 3m) with the HDMI logo. If no sound is heard, check PC audio settings. If the connected device supports HDMI Deep Color, the picture may be clearer; otherwise, disable the monitor's [HDMI Deep Color] setting via [General] > [External Devices] > [HDMI Settings].

DisplayPort Connection

Transmits digital video and audio signals. Ensure PC's DP version compatibility. For Mini DisplayPort outputs, use a Mini DP to DP cable or gender supporting DisplayPort 1.4.

USB-C (UPSTREAM) Connection

Transmits digital video and audio signals. USB-C does not support fast charging. PD and DP Alternate Mode are supported. Features may vary based on device specifications. The USB-C port is for PC connection, not monitor power; connect the adapter for monitor power.

USB (USB-IN) Device Connection

The USB-IN port connects USB devices to the PC when using USB-C upstream, or to the monitor otherwise. It is recommended to update Windows before use. Peripheral devices are sold separately. USB-IN supports USB 2.0. Cautions: Devices with automatic recognition programs or custom drivers may not be recognized. Some USB devices may not be supported. Use USB hubs or HDDs with external power. Some USB hubs may not work; connect directly if issues arise. USB-C Dockingstations or Hubs may not work with smart monitors.

Headphones Connection

Connect peripherals via the headphone port. Peripheral devices are sold separately. Audio functions may be limited by PC/external device settings. Angled earphones may interfere with other connections; straight earphones are recommended.

Starting Monitor

Parts and Buttons

The physical buttons on the monitor typically include:

• Power: Press to turn the monitor on.
• Quick Menu: Press once to access the quick menu.
• Menu Selection: Press to control menus.
• Power Off: Press and hold to turn the monitor off.

Using Remote Control

The remote control allows operation of the monitor. Key buttons include:

• Power: Turns the monitor on or off.
• Input Select: Selects the input mode.
• Volume buttons: Adjusts volume.
• Mute: Mutes all sounds.
• Channel buttons: Scrolls through saved channels.
• Back: Returns to the previous menu.
• Home: Displays the Home menu (time, weather, apps, inputs).
• More Actions: Press and hold to view item details.
• Settings: Opens or closes the main menu.
• Color key: Press and hold to use the 4 color buttons.
• Direction buttons and OK: Navigate and select menus.
• Streaming Service buttons: Connects to video streaming services.
• Home Dashboard: Accesses the [Home Dashboard].
• User Guide: Accesses the [User Guide].
• Favorite Channels: Accesses your favorite channels list.

Some buttons and services may vary by model or region.

Point the remote control toward the monitor's sensor. Do not expose the product to excessive heat.

Replacing the Remote Control Battery

Use a 3V, CR2025 button cell battery. Pull the battery tray from the back of the remote, align the new battery, and insert the tray until it clicks.

Product Information

Environment Condition

• Operating Temperature: 0 °C to 40 °C (32 °F to 104 °F)
• Operating Humidity: Less than 80 %
• Storage Temperature: -20 °C to 60 °C (-4 °F to 140 °F)
• Storage Humidity: Less than 85 %

Wireless module (LGSBWAC23) Specifications

Wireless LAN (IEEE 802.11a/b/g/n/ac)

• Frequency range: 2,400 to 2,483.5 MHz (Output Power: 17 dBm), 5,150 to 5,725 MHz (16 dBm), 5,725 to 5,850 MHz (16 dBm)

Bluetooth

• Frequency range: 2,400 to 2,483.5 MHz (Output Power: 8 dBm)

Operating frequency is configured for the region and cannot be changed by the user. Install and operate with a minimum distance of 20 cm (7.8 inches) between the device and the body.

FCC ID: BEJLGSBWAC23 / IC: 2703H-LGSBWAC23

Type Approved Module by Jamaica: SMA - LGSBWAC23

Dimensions and Weight

34GX90SA

• With Stand (W x D x H): 784.1 mm x 291.8 mm x 580.4 mm (30.8 in x 11.4 in x 22.8 in)
• Without Stand (W x D x H): 784.1 mm x 167.1 mm x 358.3 mm (30.8 in x 6.5 in x 14.1 in)
• Weight (Without Packaging): With Stand: 10.40 kg (22.9 lbs); Without Stand: 6.20 kg (13.6 lbs)

39GX90SA

• With Stand (W x D x H): 887.8 mm x 322.8 mm x 605.7 mm (34.9 in x 12.7 in x 23.8 in)
• Without Stand (W x D x H): 887.8 mm x 198.0 mm x 404.4 mm (34.9 in x 7.7 in x 15.9 in)
• Weight (Without Packaging): With Stand: 11.45 kg (25.2 lbs); Without Stand: 7.30 kg (16.0 lbs)

Power Sources

• 34GX90SA Power Rating: 20 V 11.5 A
• 39GX90SA Power Rating: 20 V 13.5 A
• AC/DC Adaptor: Model: AD10660LF; Manufacturer: PI ELECTRONICS (H.K.) Ltd.; Input: 100-240 V~ 50/60 Hz 3.3 A; Output: 20 V 13.5 A
• Power Delivery: 65 W

Support Mode

(HDMI)

(DisplayPort/USB-C)

If input timing is outside supported frequencies, response speed or image quality may degrade. Use a graphics card supporting DSC (Display Stream Compression) for preferred timing & frequency.

HDMI Timing (Video)

Open Source Software Notice Information

To obtain source code under GPL, LGPL, MPL, and other open source licenses, visit https://opensource.lge.com. You can also request source code on CD-ROM by emailing opensource@lge.com. This offer is valid for three years after the last product shipment.

Licenses

Trademarks mentioned include VESA, DisplayPort, Dolby, Bluetooth®, and USB Type-C®. Refer to www.lg.com for model-specific license details.

Troubleshooting

Nothing is displayed on the screen.

• Check if the monitor's power cord is plugged in correctly.
• If a [No Signal] message is displayed, ensure the signal cable is properly connected between the PC and monitor.

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

• Ensure the correct resolution is selected. 1080i 60/50 Hz (interlaced) may cause flickering; switch to 1080p or the recommended resolution.
• If the graphics card is not set to the recommended resolution, text may be blurred, the screen dimmed, or the display misaligned. Contact the graphics card manufacturer if issues persist.

The screen retains an image.

• Displaying a still image for a prolonged time can damage the screen, causing image retention. Use a screensaver to extend monitor life.
• Pixilated spots (red, green, blue, white, or black) may appear on the screen; this is normal for LCD screens and not an error.

"Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message.

• Verify that the graphics card supports the Plug and Play function.

Cannot control the Monitor with the remote control.

• Check for obstacles between the product and remote.
• Ensure batteries are working and installed correctly. Replace with new batteries if necessary.

The Monitor turns off suddenly.

• Check the [Sleep Timer] setting under [General] > [System] > [Time & Timer].
• Ensure external devices are functioning correctly.
• The monitor may automatically turn off after 15 minutes of inactivity if no signal is detected.

4K resolution is unavailable.

• Confirm the cable is properly connected, preferably using supplied accessories.
• Set the proper resolution and refresh rate in PC settings or player options.
• Ensure the connected external device supports 4K resolution.
• Enable the [HDMI Deep Color] function via [General] > [External Devices] > [HDMI Settings].

Limited Warranty

Full Limited Warranty terms are available at https://www.lg.com/us and/or your warranty card.

Arbitration Notice (USA)

This Limited Warranty contains an arbitration provision requiring disputes to be resolved by binding arbitration instead of court, unless you opt out. Class actions and jury trials are not permitted in arbitration. Disputes must be resolved on an individual basis. To opt out, send notice to LG within 30 days of purchase via email to optout@lge.com (subject: "Arbitration Opt Out") or by calling 1-800-980-2973, providing your name, address, purchase date, model, and serial number.

Arbitration Notice (Canada)

This Limited Warranty contains an arbitration provision requiring disputes to be resolved by binding arbitration instead of court, unless provincial laws prohibit it or you opt out. This provision does not apply to consumers in Ontario and Quebec. Disputes must be resolved on an individual basis. To opt out, send notice to LG within 30 days of purchase via email to optout@lge.com (subject: "Arbitration Opt Out") or by calling 1-800-980-2973, providing your name, address, purchase date, model, and serial number.

If you keep this product and do not opt out, you accept the terms and conditions of the arbitration provision.