Dell C2423H User guide

Dell C2423H

Dell C2723H

Video Conferencing Monitor

User’s Guide

Model: C2423H/C2723H

Regulatory model: C2423Hb/C2723Hb

NOTE: A NOTE indicates important information that helps you make

better use of your computer.

CAUTION: A CAUTION indicates potential damage to hardware or loss

of data if instructions are not followed.

WARNING: A WARNING indicates a potential for property damage,

personal injury, or death.

are trademarks of Dell Inc. or its subsidiaries. Microsoft and Windows are either trademarks or registered

trademarks of Microsoft Corporation in the United States and/or other countries. Other trademarks may

be trademarks of their respective owners.

2022 - 09

Rev. A01

│  3

Contents

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About Your Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . 7

Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Identifying Parts and Controls . . . . . . . . . . . . . . . . . . . . . . 11

Front View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Monitor Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Resolution Specifications . . . . . . . . . . . . . . . . . . . . . . . . 16

Supported Video Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Preset Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Multi-Stream Transport (MST) Modes. . . . . . . . . . . . . . . . . . . . . . 18

Unified Communications (UC) Platform Compatibility List . . . . . . 18

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Webcam and Microphone Specifications . . . . . . . . . . . . . . . . . . . 20

Speaker Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Monitor Environmental Characteristics . . . . . . . . . . . . . . . . . . . . 22

Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Universal Serial Bus (USB) Interface . . . . . . . . . . . . . . . . 26

USB Upstream Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

USB Downstream Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

USB Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Plug and Play Capability. . . . . . . . . . . . . . . . . . . . . . . . . . 28

LCD Monitor Quality and Pixel Policy . . . . . . . . . . . . . . . 28

Ergonomics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Handling and Moving Your Display. . . . . . . . . . . . . . . . . . 30

4  │ 

Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Cleaning Your Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Setting Up the Monitor . . . . . . . . . . . . . . . . . . . . . 33

Setting Up the Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Operating the Monitor Webcam. . . . . . . . . . . . . . . . . . . . 38

Organizing Your Cables . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Securing Your Monitor Using Kensington Lock 

(optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Connecting Your Monitor . . . . . . . . . . . . . . . . . . . . . . . . . 39

Connecting the HDMI Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Connecting the DisplayPort (DisplayPort to DisplayPort) Cable . 40

Connecting the Monitor for DP Multi-Stream Transport (MST)

Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Using the Tilt, Swivel, and Vertical Extension . . . . . . . . . 42

Tilt, Swivel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Vertical Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Rotating the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Rotate Clockwise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Rotate Counterclockwise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Adjusting the Rotation Display Settings of Your 

System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Removing the Monitor Stand . . . . . . . . . . . . . . . . . . . . . . 46

VESA Wall Mounting (optional) . . . . . . . . . . . . . . . . . . . . 46

Operating the Monitor . . . . . . . . . . . . . . . . . . . . . . 48

Enable Menu Voice Function . . . . . . . . . . . . . . . . . . . . . . 48

Using the Joystick Control. . . . . . . . . . . . . . . . . . . . . . . . 50

Joystick Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Using the Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Using the Menu Launcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Menu Launcher Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Using the Navigation keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

│  5

Using the On-Screen Display (OSD) menu . . . . . . . . . . . 53

Accessing the Menu System (Menu Voice On). . . . . . . . . . . . . . . 53

Accessing the Menu System (Menu Voice Off) . . . . . . . . . . . . . . 64

OSD Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Initial Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

OSD Warning Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Setting the Maximum Resolution. . . . . . . . . . . . . . . . . . . 81

Setting Up Windows Hello . . . . . . . . . . . . . . . . . . . . . . . . 82

Setting Up the Monitor Webcam as Default Setting . . . . 86

Setting Up the Monitor Speaker as Default Setting . . . . 90

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Self-test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Using the Joystick to Lock/Unlock Buttons. . . . . . . . . . . 94

Locking the Power and Joystick Buttons . . . . . . . . . . . . . . . . . . . 94

Updating Monitor Firmware . . . . . . . . . . . . . . . . . . . . . . . 95

Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Product Specific Problems . . . . . . . . . . . . . . . . . . . . . . . 99

Universal Serial Bus (USB) Specific Problems . . . . . . . 108

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

FCC Notices (U.S. only) and Other Regulatory 

Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Contact Dell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

EU Product Database for Energy Label and Product

Information Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

6 | Safety Instructions

Safety Instructions

WARNING: Use of controls, adjustments, or procedures other than

those specified in this documentation may result in exposure to shock,

electrical hazards, and/or mechanical hazards.

• Place the monitor on a solid surface and handle it carefully. The screen is

fragile and can be damaged if dropped or hit sharply.

• Always be sure that your monitor is electrically rated to operate with the AC

power available in your location.

• Keep the monitor in room temperature. Excessive cold or hot conditions can

have an adverse effect on the liquid crystal of the display.

• Do not subject the monitor to severe vibration or high impact conditions. For

example, do not place the monitor inside a car trunk.

• Unplug the monitor when it is going to be left unused for an extended period

of time.

• To avoid electric shock, do not attempt to remove any cover or touch the

inside of the monitor.

For information on safety instructions, see the Safety, Environmental, and

Regulatory Information (SERI) document that is shipped with your monitor.

About Your Monitor  │  7

About Your Monitor

Package Contents

Your monitor ships with the components shown in the table below. If any

component is missing, contact Dell technical support. For more information, see

Contact Dell.

NOTE: Some items may be optional and may not ship with your monitor.

Some features may not be available in certain countries.

NOTE: If you are attaching a stand that you purchased from any other

source, follow the set up instructions that were included with the

stand.

Display

Stand Riser

Stand Base

8  │  About Your Monitor

Power Cable (varies by

country)

DisplayPort to DisplayPort

cable

Cable length: 1.80 M

HDMI Cable

Cable length: 1.80 M

SuperSpeed USB 5 Gbps

(USB 3.2 Gen1) Type-A to

Ty p e -B U p s tr e a m Ca b l e

(Enables the USB Ports on

the Monitor)

Cable length: 1.80 M

•Quick Setup Guide

• Safety, Environmental,

and Regulatory

Information

About Your Monitor  │  9

Product Features

The Dell C2423H/C2723H monitor has an active matrix, Thin-Film Transistor

(TFT), Liquid Crystal Display (LCD) and LED backlight. The monitor features

include:

•C2423H: 60.47 cm (23.80 in.) viewable area (measured diagonally). 1920 x

1080 (16:9) resolution, plus full-screen support for lower resolutions.

•C2723H: 68.58 cm (27.00 in.) viewable area (measured diagonally). 1920 x

1080 (16:9) resolution, plus full-screen support for lower resolutions.

•Built-in speakers (2 x 5 W).

• Wide viewing angle to allow viewing from a sitting or standing position.

• Color gamut of sRGB 99%.

• Digital connectivity with DisplayPort and HDMI.

• Tilt, swivel, height, and rotate adjustment capabilities.

• Ultra-thin bezel minimizes the bezel gap in multi-monitor usage, enabling

easier setup with an elegant viewing experience.

• Removable stand and Video Electronics Standards Association (VESA™)

100 mm mounting holes for flexible mounting solutions.

• Equipped with 1 USB Type-B (USB 3.2 Gen1) upstream port, 2 SuperSpeed

USB 5 Gbps (USB 3.2 Gen1) Type-A downstream ports, and 2 SuperSpeed

USB 5 Gbps (USB 3.2 Gen1) Type-A downstream charging ports (BC 1.2).

• Plug and play capability if supported by your system.

• On-Screen Display (OSD) adjustments for ease of set-up and screen

optimization.

• Power and OSD buttons lock.

• Security lock slot.

• Stand lock.

• < 0.3 W in Standby Mode.

• Support menu text to speech (English) via Dell Text to Speech Monitor

Module - TS23 (provided separately on C2423H upon request through Sales).

• Certified for Windows Hello® (Face Authentication) and supports Microsoft

Cortana®.

• The monitor uses Low Blue Light panel and is in compliance with TUV

Rheinland (Hardware Solution) at factory reset/default setting mode.

• Decreases the level of hazard blue light emitted from the screen to make

viewing more comfortable for your eyes.

10  │  About Your Monitor

• The monitor adopts Flicker-Free technology, which clears the eye visible

flicker, brings comfort viewing experience and preventing users suffer from

eye strain and fatigue.

• Optimize eye comfort with a flicker-free screen and low blue light feature.

WARNING: The possible long-term effects of blue light emission from

the monitor may cause damage to the eyes, including eye fatigue,

digital eye strain, and so on. ComfortView Plus feature is designed to

reduce the amount of blue light emitted from the monitor to optimize

eye comfort. The monitors use Low Blue Light panel and is in

compliance with TUV Rheinland (Hardware Solution) at factory reset/

default setting mode (Brightness: 75%, Contrast: 75%, Preset mode:

Standard)

About Your Monitor  │  11

Identifying Parts and Controls

Front View

Front View with Monitor Stand

No. Description Use

1Microphones Monitor microphones (Mic).

2IR LED Indicator of infrared (IR).

3Webcam lens Transmits your image in a video conference.

4Webcam LED

indicator

Indicator of Webcam. It will light up in white when

webcam is in use.

5Speaker mute &

LED

Press to mute and unmute speaker.

LED will light up in static white when speaker is

muted.

LED will go dark when speaker is enabled/unmuted.

6Volume down &

LED

Short press for 2 unit volume decrement.

Long press for continuous volume decrement.

12  │  About Your Monitor

Back View

Back View with Monitor Stand

7Volume up & LED Short press for 2 unit volume increment.

Long press for continuous volume increment.

8Microphone mute

& LED

Press to mute and unmute microphone.

LED will light up in static red when mic is muted.

LED will go dark when mic is enabled/unmuted.

9Power LED

indicator

Solid white light indicates that the monitor is turned

on and functioning normally. Breathing white light

indicates that the monitor is in Standby Mode.

No. Description Use

1VESA mounting holes (100 mm

x 100 mm - behind the attached

VESA Cover)

Wall mount monitor using VESA-

compatible wall mount kit (100 mm x

100 mm).

2Regulatory label Lists the regulatory approvals.

3Stand release button Releases stand from the monitor.

4Barcode, serial number, and

Service T

ag label

Contains monitor details and support

information. Refer to this label if you

need to contact Dell for technical

support.

5Power On/Off button To turn the monitor on or off.

About Your Monitor  │  13

Bottom View

Bottom View without Monitor Stand

6Joystick Use to control the OSD menu. (For

more Information, see Operating the

Monitor)

7Cable-management slot Use to organize cables by inserting

them through the slot.

No. Description Use

1Power connector Connect the power cable (shipped with your

monitor).

2Security lock slot

(based on Kensington

Security Slot™)

Secures the monitor with security lock 

(sold separately).

3HDMI port Connect your computer with the HDMI

cable.

4Stand lock feature To lock the stand to the monitor using a M3 x

6 mm screw (screw not included).

5DisplayPort Connect your computer with the DisplayPort

cable.

14  │  About Your Monitor

*To avoid signal interference, when a wireless USB device has been connected to a

USB downstream port, it is NOT recommended to connect any other USB devices

to the adjacent port(s).

6DisplayPort (out) DisplayPort output for MST (multi-stream

transport) capable monitor. To enable MST,

see Connecting the Monitor for DP Multi-

Stream Transport (MST) Function.

NOTE: Remove the rubber plug when using

DisplayPort out connector.

7SuperSpeed USB 5

Gbps (USB 3.2 Gen1)

Ty p e -B u p s tr e a m po r t

Connect the USB cable that comes with your

monitor to the computer. Once this cable is

connected, you can use the USB connectors

on the monitor.

8SuperSpeed USB 5

Gbps (USB 3.2 Gen1)

Type-A downstream

port (2)

Connect your USB device.*

NOTE: T

o use this port, you must connect

the USB upstream cable (shipped with your

monitor) to the USB Type-B upstream port

on the monitor and to your computer.

9SuperSpeed USB 5

Gbps (USB 3.2 Gen1)

Type-A downstream

port with Power

Charging (BC 1.2)

Connect your USB device* or charge your

device

NOTE: T

o use this port, you must connect

the USB upstream cable (shipped with your

monitor) to the USB Type-B upstream port

on the monitor and to your computer.

10 Headphone jack Connect headphones or headset to playback

audio through HDMI or DisplayPort audio

channels.

CAUTION: Increasing the audio output

beyond 50% on the volume control or

equalizer may increase the output

voltage on the headphones thereby

increasing the sound pressure levels.

11 Built-in speakers To output the sound from audio input.

About Your Monitor  │  15

Monitor Specifications

Model C2423H C2723H

Screen type Active matrix - TFT LCD

Panel technology In-Plane Switching Technology

Aspect ratio 16:9

Viewable Image

Diagonal

Width (active area)

Height (active area)

Tot a l a re a

604.70 mm (23.80 in.)

527.04 mm (20.75 in.)

296.46 mm (11.67 in.)

156246.28 mm2

(242.18 in.2)

685.80 mm (27.00 in.)

597.89 mm (23.54 in.)

336.31 mm (13.24 in.)

201076.38 mm2

(311.67 in.2)

Pixel pitch 0.2745 mm x 0.2745 mm 0.3114 mm x 0.3114 mm

Pixel per inch (PPI) 92.53 81.59

Viewing angle 178° (vertical) typical

178° (horizontal) typical

Luminance output 250 cd/m² (typical) 300 cd/m² (typical)

Contrast ratio 1000 to 1 (typical)

Faceplate coating Anti-Glare with 3H hardness

Backlight LED

Response time 8 ms (Normal)

5 ms (Fast)

Color depth 16.78 million colors

Color gamut sRGB 99%

Built-in devices 1 x USB 3.2 Gen1 upstream port

4 x USB 3.2 Gen1 downstream ports

16  │  About Your Monitor

*DisplayPort 1.2/MST/DP audio is supported.

Resolution Specifications

Horizontal scan range 30 kHz to 83 kHz (automatic)

Vertical scan range 56 Hz to 76 Hz (automatic)

Maximum preset resolution 1920 x 1080 at 60 Hz

Connectivity • 1 x DisplayPort version 1.2* (HDCP 1.4)

• 1 x HDMI port version 1.4 (HDCP 1.4)

• 1 x DisplayPort (Out) with MST

• 1 x USB Type-B (USB 3.2 Gen1) upstream port

• 2 x SuperSpeed USB 5 Gbps (USB 3.2 Gen1)

downstream ports

• 2 x SuperSpeed USB 5 Gbps (USB 3.2 Gen1)

downstream ports with BC1.2 charging capability at

2 A (maximum)

• 1 x 3.5 mm headphone jack

Border width (edge of

monitor to active area)

5.37 mm (Top)

5.38 mm (Left/Right)

17.06 mm (Bottom)

5.99 mm (Top)

6.01 mm (Left/Right)

17.06 mm (Bottom)

Adjustability

Height adjustable stand

Ti l t

Swivel

Pivot

150 mm

-5° to 21°

-45° to 45°

-90° to 90°

Dell Display Manager

(DDM) compatibility

Easy Arrange and other key features

Security Security lock slot (cable lock sold separately)

Model C2423H/C2723H

About Your Monitor  │  17

Supported Video Modes

Video display capabilities (HDMI

& DisplayPort)

480p, 576p, 720p, 1080i*, 1080p

*Supported by HDMI input only.

Preset Display Modes

Display Mode Horizontal

Frequency

(kHz)

Vertical

Frequency

(Hz)

Pixel

Clock

(MHz)

Sync

Polarity

(Horizontal

/Vertical)

VESA, 720 x 400

VESA, 640 x 480

VESA, 800 x 600

VESA, 1024 x 768

VESA, 1152 x 864

VESA, 1280 x 1024

VESA, 1600 x 900

VESA, 1920 x 1080

NOTE: The + or - sign in Sync polarity denotes that the video sync

signal is triggered by either the positive edge or the negative edge,

respectively.

Model C2423H/C2723H

31.47 70.08 28.32 -/+

31.47 60.00 25.17 -/-

37.50 75.00 31.50 -/-

37.88 60.32 40.00 +/+

46.88 75.00 49.50 +/+

48.36 60.00 65.00 -/-

60.02 75.03 78.75 +/+

67.50 75.00 108.00 +/+

64.00 60.02 108.00 +/+

80.00 75.02 135.00 +/+

60.00 60.00 108.00 +/+

67.50 60.00 148.50 +/+

18  │  About Your Monitor

Multi-Stream Transport (MST) Modes

1920 x 1080 at 60 Hz

•3

Unified Communications (UC) Platform Compatibility List

The table below highlights the call functions that work on the Dell Video

Conferencing Monitor – C2423H and C2723H when using the following UC

platforms#.

Buttons Teams app Zoom app Other UC apps

(Skype for Business, Google

Hangouts, Blue Jeans, Cisco

Webex, FaceTime, Slack,

GoToMeeting)

Speaker Mute

Volume Down

Volume Up

Microphone Mute

√ Call function works with the UC platform.

*Mute function works by pressing the Mute button, but the Mute Icon on the UC

platform is not sync (Icon shows unmute).

# On Windows 10 64 Bit OS.

MST Source Monitor Maximum Number of External Monitors that

can be Supported

1920 x 1080 at 60 Hz

√√ √

√√*√*

About Your Monitor  │  19

Electrical Specifications

Video input signals • HDMI 1.4*/DisplayPort 1.2**, 600 mV for each

differential line, 100 ohm input impedance per

differential pair

AC input voltage/

frequency/current

100 VAC to 240 VAC / 50 Hz or 60 Hz ± 3 Hz / 1.5 A

(typical)

Inrush current • 120 V: 30 A (Max.) at

0°C (cold start)

• 240 V: 60 A (Max.) at

0°C (cold start)

• 120 V: 40 A (Max.) at

0°C (cold start)

•240 V: 80 A (Max.) at

0°C (cold start)

Power consumption • 0.3 W (Off mode)1

•0.3 W (Standby mode)

1

•12.6 W (On mode)

1

•82 W (Max.)

2

•11.51 W (Pon)

3

• 36.88 kWh (TEC)3

•0.2 W (Off mode)

1

•0.3 W (Standby mode)

1

•13.2 W (On mode)

1

•85 W (Max.)

2

•11.80 W (Pon)

3

•37.72 kWh (TEC)

3

*Not supporting the HDMI 1.4 optional specification, including HDMI Ethernet

Channel (HEC), Audio Return Channel (ARC), standard for 3D format and

resolutions, and standard for 4K digital cinema resolution.

**DisplayPort 1.2/MST/DP audio is supported.

1 As defined in EU 2019/2021 and EU 2019/2013.

2 Max brightness and contrast setting with maximum power loading on all USB

ports.

3 Pon: Power consumption of On mode as defined in Energy Star 8.0 version.

TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version.

This document is informational only and reflects laboratory performance. Your

product may perform differently, depending on the software, components and

peripherals you ordered and shall have no obligation to update such information.

Accordingly, the customer should not rely upon this information in making

decisions about electrical tolerances or otherwise. No warranty as to accuracy or

completeness is expressed or implied.

Model C2423H C2723H

20  │  About Your Monitor

Webcam and Microphone Specifications

Model C2423H/C2723H

Lens Field of view 88.9° for 2560 x 1920

Focus mode Fixed Focus

Focus area 35 cm ~ 1.5 m

Focusing distance

(normal mode)

70 cm

Image Sensor Active array size 5 mega-pixel

Video Specification Video frame rate 1920 x 1080 (Full HD)- up

to 30 frames per second

Audio Specification Microphone type Digital microphone x 2

Interface USB 2.0 High Speed

Power Supply 3.3 volts +/- 5% for USB and Microphone

5 volts +/- 5% for IR camera

Speaker Specifications

Speaker rated power 2 x 5 W

Frequency Response 200 Hz - 16 kHz

Impedance 8 ohm

NOTE: This monitor is ENERGY STAR certified.

This product qualifies for ENERGY STAR in the factory

default settings which can be restored by “Factory Reset”

function in the OSD menu. Changing the factory default

settings or enabling other features may increase power

consumption that could exceed the ENERGY STAR specified

limit.

Model C2423H/C2723H

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Dell C2423H User guide

Dell C2423H User guide

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