LG 84WT70PS - User Manual

Questions and Answers

S
Susan AndersonAug 28, 2025
Why is the screen color abnormal on my LG 84WT70PS?
- S
  Sheri Caldwell DVMAug 28, 2025
  If the screen color on your LG Digital Signage is abnormal, first, set the number of colors to more than 24 bits (true color) via Control Panel - Display - Settings - Color Table menu in Windows. Then, check the connection status of the signal cable, or try re-inserting the PC video card. Note that several pixels (red, green, white, or black) may appear, which is attributable to the unique characteristics of the LCD panel and not a malfunction. For Windows 7, go to Start -> Control Panel -> Appearance and Personalization -> Font and select Adjust ClearType text. If you are using a specific graphic card that supports the UHD resolution, the problem may not be solved due to compatibility issues.
W
William PriceAug 29, 2025
Why does after-image appear on LG Digital Signage?
- M
  mary07Aug 29, 2025
  If an after-image appears on your LG Digital Signage, it may be due to using a fixed image for an extended period. To prevent this, use the screen-saver function.
C
Curtis BrownAug 30, 2025
Why can't I use 10 touch points on LG 84WT70PS Digital Signage in Windows 7/8.x?
- B
  Bryan DudleyAug 30, 2025
  If you cannot use 10 touch points in Windows 7 / 8.x on your LG Digital Signage, ensure that the content you are using supports up to 10 touch points. Some applications, like Flash Player or Paint, may not support it. Try removing and reconnecting the USB cable after 10 seconds, or restart the content. Restarting your PC may also help. Note that touch errors may occur if the gap between two touch points is 20 mm or less, and 10 touch points may work unstably on the edge of the touch screen.
E
Edward BradfordAug 31, 2025
How to turn off key lock on LG 84WT70PS?
- S
  Sean JonesAug 31, 2025
  If the 'Key Lock On' message appears on your LG Digital Signage, the Lock function is preventing OSD settings from being changed. To release the lock, go to Menu and Option and disable the Key Lock option.
P
Peter AllenAug 31, 2025
What to do if 'Unknown Product' message appears on LG 84WT70PS?
- N
  Norma SinghAug 31, 2025
  To address the 'Unknown Product' message appearing when your LG Digital Signage is connected, check if the plug&play function is supported by referring to the video card user manual.
J
John PetersAug 25, 2025
Why is the touch not responding on my LG Touchscreen?
- N
  Nancy FosterAug 25, 2025
  If you are experiencing problems with touch response on your LG Touchscreen, consider the following: * Check the USB cable connection between your PC and the monitor. * Ensure your PC is powered on and the power cord is firmly plugged into a power outlet. * Restart your PC, as touch functionality may be affected by an unstable network. * Verify the signal cable connection between your PC and the monitor. * Check if the monitor is powered on and the screen is displayed.
C
cory96Sep 2, 2025
How to fix the audio on my LG Touchscreen?
- P
  Pamela NovakSep 2, 2025
  If the audio function on your LG Touchscreen is not working, try the following: * Check if the audio cable is connected properly. * Adjust the volume settings. * Ensure the sound is set properly. * Adjust the Clear Voice ll, Treble, and Bass settings as needed.
I
irhodesSep 2, 2025
How to fix abnormal screen color on LG Touchscreen?
- K
  Kristie ChristensenSep 2, 2025
  If the screen color on your LG Touchscreen appears abnormal, try these solutions: * Set the number of colors to more than 24 bits (true color) in the Windows Control Panel under Display Settings. * Check the connection status of the signal cable, or re-insert the PC video card. * For Windows 7, go to Start -> Control Panel -> Appearance and Personalization -> Font and select Adjust ClearType text. Note: Several pixels (red, green, white or black color) may appear on the screen, which can be attributable to the unique characteristics of the LCD panel and it is not a malfunction of the LCD.
O
olynchSep 3, 2025
What to do if the screen image looks abnormal on my LG Touchscreen?
- M
  Mark ChenSep 3, 2025
  If the screen image on your LG Touchscreen looks abnormal, especially with a D-Sub analog signal, try the following: * Press the "AUTO" button on the remote control to automatically select the optimal screen status. * If adjustment is not satisfactory, select [PICTURE] - [Screen] - [Position] in the OSD menu. * Check if the video card resolution and frequency are supported by the product. * Connect the signal cable that matches with the source input signal.
K
kellermichelleSep 4, 2025
Why doesn't touch location match coordinates on my LG Touchscreen?
- L
  Laura EstradaSep 4, 2025
  If the location of a touch does not correspond to the touch coordinates on your LG Touchscreen, especially in Windows 7, try the following: * Calibrate the touch screen through Control Panel > Hardware and Sound > Tablet PC Settings > Display > Display options > Calibrate or Reset.

Summary

ASSEMBLING AND PREPARING

Parts and Buttons

Identifies physical parts and buttons on the monitor and its connection panel for user reference.

Mounting on a Wall

Guidelines and safety precautions for properly mounting the monitor on a wall.

REMOTE CONTROL

USING THE MONITOR

Connecting to a PC

Explains how to connect a PC to the monitor, including the Plug & Play feature.

ENTERTAINMENT

Connecting to a Network

Connecting USB Storage Devices

Guide to connecting USB devices (HDD, memory) to play media files.

Using My Media

Playing Video

Viewing Photos

Listening to Music

CUSTOMIZING SETTINGS

PICTURE Settings

How to adjust picture settings like mode, energy saving, and aspect ratio for optimal viewing.

Picture Mode options

Picture Option

SOUND Settings

How to adjust sound settings like mode, virtual surround, clear voice, and AV sync.

TIME Settings

OPTION Settings

NETWORK Settings

How to configure network connection, check status, and enable display sharing.

MAKING CONNECTIONS

HDMI Connection

Connecting to a USB

Connecting to the LAN

USING THE TOUCH SCREEN

To Use the Touch Screen on Windows 7; 8 (Enterprise)

Steps to connect and enable touch screen functionality with compatible Windows operating systems.

Precaution When Using the Touch Screen

TROUBLESHOOTING

No image is displayed

Solutions for issues where no image appears on the screen, checking connections and power.

The screen image looks abnormal.

Solutions for various screen image abnormalities like incorrect position, noise, or blurriness.

The audio function does not work.

Troubleshooting steps for issues related to no sound or poor audio quality.

Screen color is abnormal.

Solutions for abnormal screen color, instability, or pixel issues.

The operation does not work normally.

Troubleshooting for general operational issues, such as sudden power off or unresponsiveness.

I have a problem with touch response.

Comprehensive guide to resolving issues related to touch screen input and calibration.

Display Sharing function does not operate.

Solutions for problems encountered when using the Display Sharing feature.

CONTROLLING THE MULTIPLE PRODUCT

Command Reference List

Comprehensive list of commands, their codes, and data ranges for product control via RS-232C.

Transmission; Receiving protocol

Explains the command transmission format and acknowledgement protocols for product control.

LG 84WT70PS Specifications

General

Screen Size	84 inches
Contrast Ratio	1200:1
Viewing Angle	178°/178°
Panel Type	IPS
Display Type	LED
Response Time	8 ms
External Control	RS-232C, LAN
Orientation	Landscape / Portrait
Operating Temperature	0°C to 40°C
Operating System	WebOS
RAM	2 GB
Resolution	3840 x 2160
Brightness	500 cd/m²
Input	HDMI, DisplayPort
Output	Audio Out
Power Supply	100-240V~, 50/60Hz
Processor	Quad Core
Ports	USB, HDMI, DisplayPort, RS-232C, LAN
Power Consumption	450W