Introduction

Package Contents

Monitor
Power Cord
Video Cable
USB Cable
Quick Start Guide

Note: The cables included in your package may vary depending on your country. Please contact your local reseller for more information.

Product Overview

Front View
Rear View

Number	Description
1	Control Panel Keys
2	Power Button
3	I/O Ports
4	Security Lock Slot

I/O Ports

Number	Description
1	AC IN
2	HDMI
3	DisplayPort
4	USB Type C
5	USB Upstream
6	USB Downstream
7	Audio Out

Note: For more information about the Control Panel Keys, refer to Using the Control Panel Keys.

Initial Setup

Installing the Stand

Note: Place the monitor on a flat, stable surface to ensure safety and optimal performance.

Removing the Stand

Important: Before removing the stand, turn off the monitor, disconnect all cables, and place the monitor on a flat, stable surface with the screen facing down.

Mounting the Monitor

After removing the stand, the monitor can be mounted using an optional mounting kit or bracket.

Note: For use only with a UL certified mounting kit. To obtain a mounting kit or height adjustment base, contact ViewSonic® or your local dealer.

Refer to the table below for the standard dimensions for mounting kits.

Maximum Loading	Pad Hole	Screw Specification	Screw Quantity
14 kg	100 x 100 mm	M4 x 10 mm	4 screws

Attach the mounting bracket to the VESA mounting holes at the rear of the monitor, securing it with four M4 x 10 mm screws.
Follow the mounting kit instructions to mount the monitor.

Using the Security Slot

To help prevent the monitor from being stolen, use a security slot locking device to secure the monitor to a fixed object.

Additionally, fastening the monitor to a wall or fixed object using a security cable can help support the weight of the monitor in order to prevent the monitor from falling over.

Making Connections

Connecting to Power

Connect the power cord to the AC IN jack at the rear of the monitor.
Plug the power adapter into a power outlet.

Display Connection

HDMI

Connect one end of an HDMI cable to the HDMI port of the monitor.
Plug the other end of the cable into the HDMI port of your computer.

DisplayPort

Connect one end of a DisplayPort cable to the DisplayPort In port of the monitor.
Plug the other end of the cable into the DisplayPort or Mini DisplayPort port of your computer.

Note: To connect the monitor to the Thunderbolt port (v. 1 & 2) on your Mac, connect the Mini DisplayPort end of a “Mini DisplayPort to DisplayPort cable” to the Thunderbolt output port of your Mac. Then connect the other end of the cable to the DisplayPort port of the monitor.

Type C

Connect one end of a USB Type C cable to the USB Type C port of the monitor.
Plug the other end of the cable into the USB Type C port of your computer.

Note: For video output use, make sure your USB Type C output device (e.g., laptop) and cable support video signal transmission.

USB Connection

The monitor supports two types of USB ports, upstream and downstream. When making connection(s), observe the following guidelines.

	Connection Type	Description
Upstream	Type C	Transfers audio, video, power, and data between the computer and USB devices connected to the monitor.
	Type C	Supports 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A (LPS) charging.
	Type B	Transfers data between the computer and the USB devices connected to the monitor.
Downstream	Type A	For peripheral device(s) (e.g., storage device, keyboard, mouse, etc.).
Downstream	Type A	Supports 5V/2A charging.

Note:

To use peripheral devices with the USB Type A ports, please also connect your computer to the monitor’s USB Type B or Type C port.
Due to the product’s USB Type C power delivery design, do not connect the laptops’ power adapter at the same time. This can cause power distribution conflicts with the laptop, resulting in flashing screens or the forced shutdown of the laptop.

Using the USB Ports

To use the downstream USB Type A ports, connect one end of the USB Type B cable to the upstream USB Type B port of the monitor. Plug the other end of the cable, USB Type A, into a USB port of your computer.

Note: You can also use the USB Type C port instead of the USB Type B port to use the downstream USB Type A ports.

Connect your peripheral device(s) to a downstream USB Type A port of the monitor.

Audio Connection

Plug the audio jack of the audio device into the Audio Out port of the monitor.

Note: The monitor is also equipped with dual speakers.

Using the Monitor

Adjusting the Viewing Angle

Height Adjustment

Lower or raise the monitor (0 to 130 mm).

Note: When adjusting, hold the monitor firmly on both sides and press down along the adjustment track.

Screen Orientation Adjustment (Monitor Pivot)

Raise the monitor to its maximum height and then tilt it back fully.
Rotate the monitor 90° clockwise or counterclockwise from landscape to portrait orientation.

Note:

When adjusting, hold the monitor firmly on both sides.
To rotate the screen image, manually change the system’s display orientation settings.

Swivel Angle Adjustment

Turn the monitor to the left or right (360˚).

Tilt Angle Adjustment

Tilt the monitor forwards or backwards (-3.5˚ to 28˚).

Note: Adjust the monitor by supporting the stand with one hand and gently tilting the screen with the other.

Turning the Monitor On/Off

Plug the connected power adapter into a power outlet.
Press the Power ( ) button to turn on the monitor.
To turn the monitor off, press the Power ( ) button again.

Note:

The monitor will still consume power as long as the power cord is plugged in. If the monitor is not being used for extended periods, please unplug the power cord from the power outlet.
If the OSD Menu is still on screen, press and hold the Power ( ) button for three seconds to turn the monitor off.

Using the Control Panel Keys

Activate Hot Keys, navigate the On-Screen Display (OSD) Menu, and change settings.

Quick Menu

Press the 1 (★) key to activate the Quick Menu

Note: Follow the key guide that appears on the screen to select the option or make adjustments.

Icon	Menu	Description
	ViewMode	Select one of the preset color settings.
	Volume	Adjust the level, or mute the volume.
	Contrast/Brightness	Adjust the contrast or brightness level.
	Input Select	Select the input source.
	Exit	Exit the Quick Menu.

Hot Keys

When the On-Screen Display (OSD) Menu is off, you can quickly access special functions by using the Control Panel Keys.

Key	Description
1(★) + 2	Press and hold the keys to lock/unlock the OSD Menu. When the menu appears on the screen, continue holding both keys for 10 seconds to lock/unlock the OSD Menu. If the OSD Menu is locked, the below message will appear on the screen:
2 + 3	Press and hold the keys to lock/unlock the Power ( ) button. When the menu appears on the screen, continue holding the key for 10 seconds to lock/unlock the Power ( ) button. If the Power ( ) button is locked, the below message will appear on the screen:
2 + 4	Press the keys to display/hide the Boot up Screen when the monitor is turned on.

Configuring the Settings

General Operations

Press the 2/3/4 key to display the On-Screen Display (OSD) Menu.

Press the 1(★) or 2 key to select the main menu. Then press the 3 key to enter the selected menu.

Press the 1(★) or 2 key to select the desired menu option. Then press the 3 key to enter the sub-menu.

Press the 1(★) or 2 key to adjust/select the setting. Then press the 3 key to confirm.

Note: Certain menu option adjustments do not require the user to press the 3 key to confirm the selection. Follow the key guide that appears on the screen to select the option or make adjustments.

Press the 4 key to return to the previous menu.

Appendix

Specifications

Item	Category	Specifications
ID	Model No.	VS20138
ID	P/N	VG2409-MHDU-2
LCD	Type	Color, a-si TFT Active Matrix 1920 x 1080 LCD, 0.2745 (H) mm x 0.2745 (V) mm pixel pitch
	Display Size	60.45 cm
	Display Size	23.8" viewable
	Color Filter	RGB Vertical Stripe
	Glass Surface	Anti-Glare (Haze 25%), Hard Coating (3H)
Input Signal	Video Sync	TMDS digital (100 Ω) DisplayPort: f_h: 30~125 kHz, f_v: 48~100 Hz HDMI: f_h: 30~125 kHz, f_v: 48~100 Hz Type C: f_h: 30~125 kHz, f_v: 48~100 Hz
Compatibility	PC	up to 1920 x 1080
Compatibility	Macintosh	up to 1920 x 1080
Resolution and Timings^[1]	Recommended	1920 x 1080 @ 60 Hz
Resolution and Timings^[1]	Supported	1920 x 1080 @ 50, 60, 75, 100 Hz 1680 x 1050 @ 60 Hz 1600 x 1200 @ 60 Hz 1600 x 900 @ 60 Hz 1440 x 900 @ 60, 75 Hz 1440 x 576 @ 50 Hz 1400 x 1050 @ 75, 60 Hz 1366 x 768 @ 60 Hz 1360 x 768 @ 60 Hz 1280 x 1024 @ 50, 60, 75 Hz 1280 x 960 @ 50, 60, 75 Hz 1280 x 800 @ 60, 75 Hz 1280 x 768 @ 50, 60, 75 Hz 1280 x 720 @ 50, 60 Hz 1152 x 900 @ 66 Hz 1152 x 870 @ 75 Hz 1152 x 864 @ 60, 75 Hz 1024 x 768 @ 50, 60, 70, 75 Hz 1024 x 600 @ 60 Hz 848 x 480 @ 60 Hz 832 x 624 @ 75 Hz 800 x 600 @ 60, 75 Hz 720 x 576 @ 50 Hz 720 x 480 @ 60 Hz 720 x 400 @ 70 Hz 640 x 480 @ 50, 60, 75 Hz 640 x 400 @ 60, 70 Hz 640 x 350 @ 70 Hz
Power^[2]	Input Voltage	AC 100-240V, 50/60 Hz (auto switch)
Display Area	Active Size (H x V)	527.04 x 296.4 mm
Display Area	Active Size (H x V)	20.75” x 11.67”
Operating Conditons	Altitude	5 km
	Altitude	16,404.2 ft
	Relative Humidity	20% to 90% (non-condensing)
	Temperature	0° C to 40° C
	Temperature	32° F to 104° F
Storage Conditions	Altitude	12 km
	Altitude	39,370.1 ft
	Relative Humidity	5% to 90% (non-condensing)
	Temperature	-20° C to 60° C
	Temperature	-4° F to 140° F
Dimensions (with stand)	Physical (W x H x D)	539.7 x 519.9 x 233.3 mm
Dimensions (with stand)	Physical (W x H x D)	21.2” x 20.5” x 9.2”
Weight (with stand)	Physical	5.6 kg
Weight (with stand)	Physical	12.3 lb
Wall Mount	Dimensions	100 x 100 mm
Power Consumption	On^[3]	26W (Typical)
Power Consumption	Off	< 0.3W (Maximum)

↑ Do not set the graphics card in your computer to exceed these timing modes; doing so may result in permanent damage to the display.
↑ Please use the power adapter/power cord from ViewSonic® or an authorized source only.
↑ The test condition follows EEI standards.

On-Screen Display (OSD) Menu Tree

Sub-menu
HDMI
DisplayPort
Type C

Sub-menu	Menu Option
Volume	On	(-/+, 0~100)/1
Volume	Mute

Sub-menu
Standard
Game
Movie
Web
Text
MAC
Mono

Sub-menu	Menu Option
Contrast/Brightness	Contrast	(-/+, 0~100)/1
Contrast/Brightness	Brightness	(-/+, 0~100)/1
Color Temperature	sRGB
	Bluish
	Cool
	Native
	Warm
	User Color	Red	(-/+, 0~100)/1
		Green	(-/+, 0~100)/1
		Blue	(-/+, 0~100)/1
Color Space	Auto
	RGB
	YUV
Color Range	Auto
	Full Range
	Limited Range

Sub-menu	Menu Option
Sharpness	(-/+, 0~100)/25
Blue Light Filter	(-/+, 0~100)/1
Aspect Ratio	4:3
	5:4
	16:9
	16:10
Overscan^[1]	On
Overscan^[1]	Off
Black Stabilization	(-/+, 0~100)/10
Advanced DCR	(-/+, 0~100)/25
Response Time	Standard
	Advanced
	Ultra Fast

Sub-menu	Menu Option
Language	English
	Français
	Deutsch
	Español
	Italiano
	Suomi
	Svenska
	Русский
	Türkçe
	Česká
	Tiếng Việt
	日本語
	한국어
	繁體中文
	简体中文
Variable Refresh Rate	On
Variable Refresh Rate	Off
Information
OSD Timeout	(-/+, 5/15/30/60)
OSD Background	On
OSD Background	Off
OSD Pivot	0°
OSD Pivot	90°
Power Indicator	On
Power Indicator	Off
Auto Power Off	On
Auto Power Off	Off
Sleep	30 minutes
	45 minutes
	60 minutes
	120 minutes
	Off
ECO Mode	Standard
	Optimize
	Conserve
	USB Charging^[2]	On
	USB Charging^[2]	Off
DisplayPort Version^[3]	1.1
DisplayPort Version^[3]	1.2
Auto Detect	On
Auto Detect	Off
DDC/CI	On
DDC/CI	Off
Memory Recall

↑ The Overscan function only supports a refresh rate below 60 Hz, if the refresh rate is more than 60 Hz, please do not turn on this function.
↑ This function is off by default. If the monitor is in power saving mode, USB downstream charging will not be active. To enable charging in power saving mode, it is recommended to turn on this feature. Please note that this setting will not affect the USB Type C charging on the rear side of the monitor.
↑ If no DisplayPort connection is detected, this option will be grayed out.

VG2409-MHDU-2_UG_ENG_1a_20240905

[1] Do not set the graphics card in your computer to exceed these timing modes; doing so may result in permanent damage to the display.

[2] Please use the power adapter/power cord from ViewSonic® or an authorized source only.

[3] The test condition follows EEI standards.

[4] The Overscan function only supports a refresh rate below 60 Hz, if the refresh rate is more than 60 Hz, please do not turn on this function.

[5] This function is off by default. If the monitor is in power saving mode, USB downstream charging will not be active. To enable charging in power saving mode, it is recommended to turn on this feature. Please note that this setting will not affect the USB Type C charging on the rear side of the monitor.

[6] If no DisplayPort connection is detected, this option will be grayed out.

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