LG 34UM88-P Manual

The LG 34UM88-P is a 34-inch UltraWide QHD IPS LED Monitor with 3440x1440 resolution, sRGB 99% color gamut, AMD FreeSync technology, OnScreen Control, Screen Split, Reader Mode, Black Stabilizer, Dynamic Action Sync, and multiple connectivity options including HDMI, DisplayPort, and USB ports. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Display Modes 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 34-inch UltraWide IPS display, OnScreen Control software, AMD FreeSync, multiple input ports, ergonomic stand with height/tilt adjustment.

Feature	Description
Screen Size	34-inch UltraWide QHD (3440x1440)
Panel Type	IPS LED
Color Gamut	sRGB 99%
Refresh Rate	60Hz
Response Time	5ms (GTG)
AMD FreeSync	Reduces screen tearing and stuttering
Connectivity	HDMI, DisplayPort, USB 3.0
OnScreen Control	Software for easy monitor settings
Screen Split	Multiple window configurations
Ergonomic Stand	Height, tilt, and swivel adjustment

Installation

Unpack and inspect contents. Assemble monitor on stable surface.

Attach stand: Align stand with monitor base and secure with provided screws.
Connect power: Plug power cord into monitor and wall outlet.
Connect video sources: Use HDMI or DisplayPort cables for video input.
Connect USB devices: Use USB 3.0 ports for peripheral connections.

WARNING! Monitor is heavy; lift with care to avoid injury. Ensure all connections are secure.

First-Time Setup

Power on monitor; adjust settings as needed.

Input selection: Press INPUT button to select HDMI or DisplayPort.
Display settings: Use OSD menu to adjust brightness, contrast, and color.
Screen Split: Configure multi-window layout using OnScreen Control.
AMD FreeSync: Enable in OSD menu for gaming optimization.

CAUTION! Ensure stable surface; adjust stand carefully to prevent tipping.

Specifications

Screen Size: 34 inches UltraWide.
Resolution: 3440 x 1440 QHD.
Aspect Ratio: 21:9.
Panel Technology: IPS.
Brightness: 300 cd/m².
Contrast Ratio: 1000:1.
Viewing Angles: 178°/178°.
Connectivity: 2x HDMI, DisplayPort, 2x USB 3.0.
Power Consumption: 45W typical.
VESA Mount: 100x100mm compatible.

Controls and Settings

Access OSD via joystick button on bottom bezel. Power button located on rear.

OSD Menu: Brightness, Contrast, Sharpness, Color Temperature, Input Selection, Game Mode, Screen Split, Reader Mode.

Picture: Brightness, Contrast, Sharpness, Gamma, Color Temperature. Game: Black Stabilizer, Response Time, FreeSync. Display: Input List, Screen Split, Aspect Ratio. General: Language, Reset.

Connecting Devices

HDMI: For computers, gaming consoles. DisplayPort: For high-resolution PC connections. USB: For peripherals and charging.

Turn off monitor and devices before connecting.
Match cables to ports (HDMI to HDMI, DisplayPort to DisplayPort).
Select input via INPUT button or OSD menu.
Install OnScreen Control software for enhanced settings management.

Tip: Use high-quality cables for best performance at 3440x1440 resolution.

Display Modes

Supports various preset modes for different usage scenarios.

Reader Mode: Reduces blue light for comfortable reading.
Game Mode: Optimizes settings for gaming with Black Stabilizer.
Photo Mode: Enhances color accuracy for image editing.
Cinema Mode: Improves contrast for video content.
Screen Split: Picture-by-Picture and Picture-in-Picture modes.

WARNING! Avoid static images for extended periods to prevent image retention.

Accessibility Features

Reader Mode: Blue light reduction for eye comfort. Black Stabilizer: Enhances visibility in dark scenes. OnScreen Control: Easy software-based settings management.

Care & Cleaning

Unplug before cleaning. Use soft, dry cloth for screen; slightly damp cloth for casing. Avoid liquids and abrasive cleaners.

CAUTION! Do not spray liquids directly on screen; never use alcohol or ammonia-based cleaners.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2025 LG Electronics; all trademarks property of LG Electronics. Energy Star compliant. For support, visit www.lg.com or contact 1-800-243-0000.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection	Check power cord connection; ensure outlet is working.
No display	Input selection/cables	Select correct input; check cable connections; try different cable.
Flickering screen	Refresh rate/cable	Adjust refresh rate in graphics settings; use high-quality cable.
Color issues	Settings/cable	Reset color settings; check cable for damage.
USB not working	Driver/connection	Install OnScreen Control; check USB cable connection.

Reset: OSD Menu > General > Reset All.

Service: 1-800-243-0000; www.lg.com