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User Manual for LG 14T90R Series Notebook

Quick guide for the LG 14T90R Series Notebook. Learn about setup, stylus pen usage, tablet mode, power connection, safety precautions, and troubleshooting common issues.

Table of contents

Manual images

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Quick guide from the manual

This manual provides essential information for the safe and convenient use of your LG 14T90R Series Notebook. Before using the product, ensure you charge the battery completely. Always back up critical data to an external storage device, as SSD malfunctions can lead to data loss. If the system does not shut down properly, wait until it is fully loaded before attempting to power off.

Product Overview

The notebook features a variety of ports and components:

Left, Right, and Back port layout.
Left, Right, and Back port layout.
  • Front: Built-in microphone, webcam, IR camera, IR LED, webcam status lamp, keyboard, touchpad, and power button.
  • Left/Right/Back: Headphone port (4-pole), USB-C ports (supporting USB 4.0, Thunderbolt, LAN/HDMI adapters, and Power Delivery), microSD card slot, sleep button, USB 3.2 Gen 2x1 port, and ventilation.

Using the Stylus Pen

The stylus pen buttons function similarly to a mouse. To use the pen:

Stylus pen battery installation.
Stylus pen battery installation.
  • Remove the battery anti-discharge insulator before first use.
  • The pen uses a 1.5 V AAAA battery.
  • If the pen is not used for 10 minutes, it enters sleep mode. Touch the screen or click a button to wake it.
  • Do not apply excessive force to the pen tip.

Tablet PC Mode

You can use the notebook as a tablet by unfolding it and rotating the LCD panel. Be careful not to pinch your fingers between the main body and the LCD panel. Do not rotate the panel with excessive force to avoid damaging the hinge. In tablet mode, the keyboard faces the bottom; ensure the area is clean to prevent damage.

Rotating the notebook into tablet mode.
Rotating the notebook into tablet mode.

Power Connection

Use only the provided AC adapter. The adapter is compatible with 100 V to 240 V power outlets. Connect the adapter to the USB-C port on the PC. The power lamp indicates the status: white means connected and charging/charged, orange means charging, and off means not connected.

Connecting the AC adapter.
Connecting the AC adapter.

Safety Precautions

  • Battery Safety: Use only certified batteries. Keep the battery away from heat and metallic objects. Do not use the product on soft surfaces like carpets or blankets, as this may cause overheating.
  • Environment: Avoid high humidity and temperatures above 60 °C.
  • Maintenance: Use a dedicated PC cleaning agent. Do not use thinner, benzene, or alcohol.

Troubleshooting

If you encounter issues, check the following:

  • Screen Color: If colors look wrong, turn off 'Reader Mode' in the LG Smart Assistant display settings.
  • System Hangs: If the system stops responding, press the power button for approximately 6 seconds to reset.
  • Touchpad: If the touchpad is unresponsive, check the settings in LG Smart Assistant > Dashboard > Touchpad.
  • Wireless Network: Press Fn + F6 to toggle airplane mode and wireless connectivity.

Manufacturer information

LG Electronics

Brand profile

Practical help

Common problems

Screen color distortion

Turn off 'Reader Mode' in the LG Smart Assistant > Display Setting menu.

System stops responding or won't turn off

Press and hold the power button for approximately 6 seconds to reset the system.

Touchpad not functioning

Check if the touchpad is disabled in LG Smart Assistant > Dashboard > Touchpad.

Wireless network not connecting

Press Fn + F6 to check if the wireless device is turned off or if airplane mode is active.

Before use

  • Charge the battery completely before first use.
  • Remove the battery anti-discharge insulator from the stylus pen.
  • Back up critical data to an external storage device.
  • Ensure the AC adapter is connected firmly to the USB-C port.
  • Check that the power outlet is between 100 V and 240 V.

Specs in practice

Stylus Battery
Requires 1.5 V AAAA type battery.
Operating Temperature
Stylus pen is rated for +5 °C to +40 °C.

Images and diagrams

  • The front view identifies the webcam, microphone, and power button location.
  • Side views illustrate the location of the headphone jack, USB-C ports, microSD slot, and vents.
  • The stylus pen diagram shows how to detach the cap to remove the battery insulator.

Model compatibility

  • Use only the provided AC adapter.
  • The 4-pole ear microphone port supports US type standards; European standards may not work properly.
  • Recommended network cable for LAN adapter is CAT5 or higher.

Manual page author

Michael Turner

Technical manual editor

Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.