DELL C2423H Video Conferencing Monitor User Guide
- June 12, 2024
- Dell
Table of Contents
C2423H Video Conferencing Monitor
Product Information
The Dell C2423H and Dell C2723H are video conferencing monitors
designed to enhance your video conferencing experience. These
monitors offer high-resolution displays and a range of features to
ensure clear and immersive video and audio communication.
Model:
- C2423H – Regulatory model: C2423Hb
- C2723H – Regulatory model: C2723Hb
Product Features:
-
High-resolution display for crisp visuals
-
Integrated webcam for video conferencing
-
USB ports for connecting peripherals
-
Tilt, swivel, and vertical extension for comfortable
viewing -
Plug and play capability for easy setup
-
Kensington lock slot for added security (optional)
Monitor Specifications:
The monitor specifications provide details about the display
resolution and other technical information. Please refer to the
user manual for a comprehensive list of specifications.
USB Interface:
The monitor features USB ports that allow you to connect
compatible devices such as keyboards, mice, and external storage
devices. The USB interface provides convenient access to these
peripherals.
Plug and Play Capability:
The monitor supports plug and play capability, which means it
can be easily connected to your computer without the need for
additional software installation. Simply connect the monitor to
your computer using the appropriate cables.
Ergonomics:
The monitor is designed with ergonomics in mind, allowing you to
adjust the tilt, swivel, and vertical extension to find the most
comfortable viewing position. This helps reduce strain on your neck
and eyes during prolonged use.
Maintenance Guidelines:
The user manual provides guidelines for cleaning and maintaining
your monitor to ensure optimal performance and longevity. Regular
cleaning of the monitor is recommended to remove dust and
smudges.
Product Usage Instructions
Setting Up the Monitor:
-
Set up the stand according to the instructions provided in the
user manual. -
Connect the monitor to your computer using the appropriate
cables (HDMI or DisplayPort). -
If using the webcam, follow the instructions for operating the
monitor webcam. -
Organize your cables to keep them neat and prevent
tangling. -
If desired, secure your monitor using a Kensington lock
(optional).
Using the Tilt, Swivel, and Vertical Extension:
Adjust the tilt, swivel, and vertical extension of the monitor
to find the most comfortable viewing position. This can be done by
gently tilting, swiveling, or extending the monitor according to
your preference.
Rotating the Monitor:
If desired, you can rotate the monitor for a portrait
orientation. Follow the instructions provided in the user manual to
safely rotate the monitor.
For detailed instructions on using specific features and
functions, please refer to the user manual provided with your Dell
C2423H or Dell C2723H video conferencing monitor.
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.
Copyright © 2022 Dell Inc. or its subsidiaries. All rights reserved. Dell,
EMC, and other trademarks 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
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
3
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
4
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
5
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.
6 | Safety Instructions
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
About Your Monitor 7
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 Type-B Upstream Cable (Enables
the USB Ports on the Monitor) Cable length: 1.80 M · Quick Setup Guide ·
Safety, Environmental,
and Regulatory Information
8 About Your Monitor
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 (VESATM)
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.
About Your Monitor 9
· 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)
10 About Your Monitor
Identifying Parts and Controls
Front View
Front View with Monitor Stand
No. Description 1 Microphones 2 IR LED 3 Webcam lens 4 Webcam LED indicator 5
Speaker mute & LED
6 Volume down & LED
Use Monitor microphones (Mic). Indicator of infrared (IR). Transmits your image in a video conference. Indicator of Webcam. It will light up in white when webcam is in use. 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. Short press for 2 unit volume decrement. Long press for continuous volume decrement.
About Your Monitor 11
7 Volume up & LED Short press for 2 unit volume increment.
Long press for continuous volume increment.
8 Microphone mute Press to mute and unmute microphone.
& LED
LED will light up in static red when mic is muted.
LED will go dark when mic is enabled/unmuted.
9 Power 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.
Back View
Back View with Monitor Stand
No.
Description
Use
1 VESA mounting holes (100 mm Wall mount monitor using VESA-
x 100 mm – behind the attached compatible wall mount kit (100 mm x
VESA Cover)
100 mm).
2 Regulatory label
Lists the regulatory approvals.
3 Stand release button
Releases stand from the monitor.
4 Barcode, serial number, and Service Tag label
Contains monitor details and support information. Refer to this label if you need to contact Dell for technical support.
5 Power On/Off button
To turn the monitor on or off.
12 About Your Monitor
6 Joystick 7 Cable-management slot Bottom View
Use to control the OSD menu. (For more Information, see Operating the Monitor)
Use to organize cables by inserting them through the slot.
Bottom View without Monitor Stand
No.
Description
Use
1 Power connector
Connect the power cable (shipped with your monitor).
2 Security lock slot
Secures the monitor with security lock
(based on Kensington (sold separately).
Security SlotTM)
3 HDMI port
Connect your computer with the HDMI cable.
4 Stand lock feature
To lock the stand to the monitor using a M3 x 6 mm screw (screw not included).
5 DisplayPort
Connect your computer with the DisplayPort cable.
About Your Monitor 13
6 DisplayPort (out)
DisplayPort output for MST (multi-stream transport) capable monitor. To enable MST, see Connecting the Monitor for DP MultiStream Transport (MST) Function.
NOTE: Remove the rubber plug when using DisplayPort out connector.
7 SuperSpeed USB 5
Connect the USB cable that comes with your
Gbps (USB 3.2 Gen1) monitor to the computer. Once this cable is
Type-B upstream port connected, you can use the USB connectors
on the monitor.
8 SuperSpeed USB 5
Connect your USB device.*
Gbps (USB 3.2 Gen1) Type-A downstream port (2)
NOTE: To 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.
9 SuperSpeed USB 5
Connect your USB device* or charge your
Gbps (USB 3.2 Gen1) device
Type-A downstream port with Power Charging (BC 1.2)
NOTE: To 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.
*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).
14 About Your Monitor
Monitor Specifications
Model Screen type Panel technology Aspect ratio Viewable Image Diagonal Width
(active area) Height (active area) Total area
Pixel pitch Pixel per inch (PPI) Viewing angle
Luminance output Contrast ratio Faceplate coating Backlight Response time
Color depth Color gamut Built-in devices
C2423H
C2723H
Active matrix – TFT LCD
In-Plane Switching Technology
16:9
604.70 mm (23.80 in.)
685.80 mm (27.00 in.)
527.04 mm (20.75 in.)
597.89 mm (23.54 in.)
296.46 mm (11.67 in.)
336.31 mm (13.24 in.)
156246.28 mm2 (242.18 in.2)
201076.38 mm2 (311.67 in.2)
0.2745 mm x 0.2745 mm 0.3114 mm x 0.3114 mm
92.53
81.59
178° (vertical) typical
178° (horizontal) typical
250 cd/m² (typical)
300 cd/m² (typical)
1000 to 1 (typical)
Anti-Glare with 3H hardness
LED
8 ms (Normal)
5 ms (Fast)
16.78 million colors
sRGB 99%
1 x USB 3.2 Gen1 upstream port
4 x USB 3.2 Gen1 downstream ports
About Your Monitor 15
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 5.37 mm (Top) monitor to active area) 5.38 mm (Left/Right)
5.99 mm (Top) 6.01 mm (Left/Right)
17.06 mm (Bottom)
17.06 mm (Bottom)
Adjustability
Height adjustable stand 150 mm
Til t
-5° to 21°
Swivel
-45° to 45°
Pivot
-90° to 90°
Dell Display Manager Easy Arrange and other key features (DDM) compatibility
Security
Security lock slot (cable lock sold separately)
*DisplayPort 1.2/MST/DP audio is supported.
Resolution Specifications
Model Horizontal scan range Vertical scan range Maximum preset resolution
C2423H/C2723H 30 kHz to 83 kHz (automatic) 56 Hz to 76 Hz (automatic) 1920 x 1080 at 60 Hz
16 About Your Monitor
Supported Video Modes
Model
C2423H/C2723H
Video display capabilities (HDMI 480p, 576p, 720p, 1080i*, 1080p & DisplayPort)
*Supported by HDMI input only.
Preset Display Modes
Display Mode
Horizontal Frequency
(kHz)
Vertical Frequency
(Hz)
VESA, 720 x 400 VESA, 640 x 480 VESA, 640 x 480 VESA, 800 x 600 VESA, 800 x 600 VESA, 1024 x 768 VESA, 1024 x 768 VESA, 1152 x 864 VESA, 1280 x 1024 VESA, 1280 x 1024 VESA, 1600 x 900 VESA, 1920 x 1080
31.47 31.47 37.50 37.88 46.88 48.36 60.02 67.50 64.00 80.00 60.00 67.50
70.08 60.00 75.00 60.32 75.00 60.00 75.03 75.00 60.02 75.02 60.00 60.00
Pixel Clock (MHz)
28.32 25.17 31.50 40.00 49.50 65.00 78.75 108.00 108.00 135.00 108.00 148.50
Sync Polarity (Horizontal /Vertical)
-/+ -/-/+/+ +/+ -/+/+ +/+ +/+ +/+ +/+ +/+
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.
About Your Monitor 17
Multi-Stream Transport (MST) Modes
MST Source Monitor
Maximum Number of External Monitors that can be Supported
1920 x 1080 at 60 Hz
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.
18 About Your Monitor
Electrical Specifications
Model
C2423H
C2723H
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 Power consumption
· 120 V: 30 A (Max.) at · 120 V: 40 A (Max.) at
0°C (cold start)
0°C (cold start)
· 240 V: 60 A (Max.) at · 240 V: 80 A (Max.) at
0°C (cold start)
0°C (cold start)
· 0.3 W (Off mode)1
· 0.2 W (Off mode)1
· 0.3 W (Standby mode)1 · 0.3 W (Standby mode)1
· 12.6 W (On mode)1
· 13.2 W (On mode)1
· 82 W (Max.)2
· 85 W (Max.)2
· 11.51 W (Pon)3
· 11.80 W (Pon)3
· 36.88 kWh (TEC)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.
About Your Monitor 19
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.
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 Model Speaker rated power Frequency Response Impedance
C2423H/C2723H 2 x 5 W 200 Hz – 16 kHz 8 ohm
20 About Your Monitor
Physical Characteristics
Model
C2423H
C2723H
Signal Cable Type
· Digital: DisplayPort, 20 pins · Digital: HDMI, 19 pins · Universal Series Bus: USB Type-A to B
NOTE: Dell monitors are designed to work optimally with the video cables that are shipped with your monitor. As Dell does not have control over the different cable suppliers in the market, the type of material, connector and process used to manufacture these cables, Dell does not guarantee video performance on cables that are not shipped with your Dell monitor.
Monitor Dimensions (with stand)
Height (extended)
496.10 mm (19.53 in.)
534.15 mm (21.03 in.)
Height (compressed) 364.00 mm (14.33 in.)
384.15 mm (15.12 in.)
Width
537.80 mm (21.17 in.)
609.90 mm (24.01 in.)
Depth
179.57 mm (7.07 in.)
190.10 mm (7.48 in.)
Monitor Dimensions (without stand)
Height
318.89 mm (12.55 in.)
359.37 mm (14.15 in.)
Width
537.80 mm (21.17 in.)
609.90 mm (24.01 in.)
Depth
57.85 mm (2.28 in.)
59.38 mm (2.34 in.)
Stand Dimensions
Height (extended)
410.80 mm (16.17 in.)
428.30 mm (16.86 in.)
Height (compressed) 364.00 mm (14.33 in.)
381.50 mm (15.02 in.)
Width
245.00 mm (9.65 in.)
268.00 mm (10.55 in.)
Depth
179.57 mm (7.07 in.)
190.10 mm (7.48 in.)
Base
245.00 mm (9.65 in.) x 173.00 mm (6.81 in.)
268.00 mm (10.55 in.) x 185.00 mm (7.28 in.)
Monitor Weight
Model
C2423H
C2723H
Weight with packaging 8.33 kg (18.36 lb)
10.01 kg (22.07 lb)
Weight with stand assembly and cables
6.02 kg (13.27 lb)
7.24 kg (15.96 lb)
About Your Monitor 21
Weight without stand assembly (For wall mount or VESA mount considerations –
no cables)
Weight of stand assemb l y
Front frame gloss
3.83 kg (8.44 lb)
1.76 kg (3.88 lb) 2-4
5.04 kg (11.11 lb) 1.76 kg (3.88 lb)
Monitor Environmental Characteristics
Model
C2423H
C2723H
Compliant Standards
· ENERGY STAR certified monitor · EPEAT registered where applicable. EPEAT
registration varies by country. See
www.epeat.net for registration status by country. · RoHS-compliant · TCO
Certified and TCO Certified Edge · BFR/PVC free monitor (excluding external
cables)
· Meets NFPA 99 leakage current requirements
· Arsenic-free glass and Mercury-free for the panel only
Temperature
Operating
0°C to 40°C (32°F to 104°F)
Non-operating
· Storage: -20°C to 60°C (-4°F to 140°F) · Shipping: -20°C to 60°C (-4°F to 140°F)
Humidity
Operating
10% to 80% (non-condensing)
Non-operating
· Storage: 5% to 90% (non-condensing)
· Shipping: 5% to 90% (non-condensing)
Al titude
Operating
5000 m (16404 ft) (maximum)
Non-operating
12192 m (40000 ft) (maximum)
22 About Your Monitor
Thermal Dissipation
Pin Assignments DP Port (in)
· 279.78 BTU/hour (maximum)
· 40.94 BTU/hour (typical)
· 290.03 BTU/hour (maximum)
· 45.04 BTU/hour (typical)
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20-pin Side of the Connected Signal Cable ML3 (n) GND ML3 (p) ML2 (n) GND ML2 (p) ML1 (n) GND ML1 (p) ML0 (n) GND ML0 (p) GND GND AUX (p) GND AUX (n) Hot Plug Detect Re-PWR +3.3 V DP_PWR
About Your Monitor 23
DP Port (out)
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20-pin Side of the Connected Signal Cable ML0 (p) GND ML0 (n) ML1 (p) GND ML1 (n) ML2 (p) GND ML2 (n) ML3 (p) GND ML3 (n) CONFIG1 CONFIG2 AUX CH (p) GND AUX CH (n) Hot Plug Detect Return DP_PWR
24 About Your Monitor
HDMI Port
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
19-pin Side of the Connected Signal Cable TMDS DATA 2+ TMDS DATA 2 SHIELD TMDS DATA 2TMDS DATA 1+ TMDS DATA 1 SHIELD TMDS DATA 1TMDS DATA 0+ TMDS DATA 0 SHIELD TMDS DATA 0TMDS CLOCK+ TMDS CLOCK SHIELD TMDS CLOCKCEC Reserved (N.C. on device) DDC CLOCK (SCL) DDC DATA (SDA) DDC/CEC Ground +5 V POWER HOT PLUG DETECT
About Your Monitor 25
Universal Serial Bus (USB) Interface
This section gives you information about the USB ports that are available on
the monitor.
NOTE: This monitor is SuperSpeed USB 5 Gbps (USB 3.2 Gen1) and High-speed USB
2.0 compatible.
USB 3.2 Gen1 Transfer Speed
SuperSpeed High speed Full speed
Data Rate 5 Gbps 480 Mbps 12 Mbps
Power Supported 4.5 W 4.5 W 4.5 W
USB 2.0 Transfer Speed
High speed Full speed Low speed
Data Rate 480 Mbps 12 Mbps 1.5 Mbps
Power Supported 2.5 W 2.5 W 2.5 W
USB Upstream Connector
Pin Number
1 2 3 4 5
9-pin Side of the Connector
VCC DD+ GND SSTX-
26 About Your Monitor
6
SSTX+
7
GND
8
SSRX-
9
SSRX+
USB Downstream Connector
Pin Number 1 2 3 4 5 6 7 8 9
9-pin Side of the Connector VCC DD+ GND SSRXSSRX+ GND SSTXSSTX+
USB Ports
· 1 USB Type-B (USB 3.2 Gen1) upstream port – bottom · 4 SuperSpeed USB 5 Gbps
(USB 3.2 Gen1) Type-A downstream ports-
2 at bottom, 2 at rear Power Charging Port – the ports with battery icon
supports fast current charging capability if the device is BC 1.2 compatible.
NOTE: SuperSpeed USB 5 Gbps (USB 3.2 Gen1) functionality requires a SuperSpeed
USB 5 Gbps (USB 3.2 Gen1)-capable computer.
NOTE: The USB ports on the monitor work only when the monitor is turned On or
in Standby Mode. If you turn Off the monitor and then turn it On, the attached
peripherals may take a few seconds to resume normal functionality.
About Your Monitor 27
Plug and Play Capability
You can connect the monitor to any Plug and Play-compatible system. The
monitor automatically provides the computer system with its Extended Display
Identification Data (EDID) using Display Data Channel (DDC) protocols so that
the system can configure itself and optimize the monitor settings. Most
monitor installations are automatic; you can select different settings if
desired. For more information about changing the monitor settings, see
Operating the Monitor.
LCD Monitor Quality and Pixel Policy
During the LCD Monitor manufacturing process, it is not uncommon for one or
more pixels to become fixed in an unchanging state which are hard to see and
do not affect the display quality or usability. For more information on Dell
Monitor Quality and Pixel Policy, see http://www.dell.com/pixelguidelines.
Ergonomics
CAUTION: Improper or prolonged usage of keyboard may result in injury.
CAUTION: Viewing the monitor screen for extended periods of time may result in
eye strain. For comfort and efficiency, observe the following guidelines when
setting up and using your computer workstation: · Position your computer so
that the monitor and keyboard are directly in front
of you as you work. Special shelves are commercially available to help you
correctly position your keyboard. · To reduce the risk of eye strain and
neck/arm/back/shoulder pain from using the monitor for long periods of time,
we suggest you to: 1. Set the distance of the screen between 20 to 28 in. (50
– 70 cm) from your
eyes. 2. Blink frequently to moisten your eyes or wet your eyes with water
after
prolonged usage of the monitor 3. Take regular and frequent breaks for 20
minutes every two hours. 4. Look away from your monitor and gaze at a distant
object at 20 feet away
for at least 20 seconds during the breaks. 5. Perform stretches to relieve
tension in the neck, arm, back, and shoulders
during the breaks. · Make sure that the monitor screen is at eye level or
slightly lower when you
are sitting in front of the monitor.
28 About Your Monitor
· Adjust the tilt of the monitor, its contrast, and brightness settings.
· Adjust the ambient lighting around you (such as overhead lights, desk lamps,
and the curtains or blinds on nearby windows) to minimize reflections and
glare on the monitor screen.
· Use a chair that provides good lower-back support.
· Keep your forearms horizontal with your wrists in a neutral, comfortable
position while using the keyboard or mouse.
· Always leave space to rest your hands while using the keyboard or mouse.
· Let your upper arms rest naturally on both sides.
· Ensure that your feet are resting flat on the floor.
· When sitting, make sure that the weight of your legs is on your feet and not
on the front portion of your seat. Adjust your chair’s height or use a
footrest if necessary to maintain a proper posture.
· Vary your work activities. Try to organize your work so that you do not have
to sit and work for extended periods of time. Try to stand or get up and walk
around at regular intervals.
· Keep the area under your desk clear of obstructions and cables or power
cords that may interfere with comfortable seating or present a potential trip
hazard.
monitor screen at or below eye level
wrists relaxed and flat
monitor and keyboard positioned directly in front of the user
feet flat on the floor
About Your Monitor 29
Handling and Moving Your Display
To ensure the monitor is handled safely when lifting or moving it, follow the
guidelines mentioned below:
· Before moving or lifting the monitor, turn off your computer and the
monitor. · Disconnect all cables from the monitor. · Place the monitor in the
original box with the original packing materials. · Hold the bottom edge and
the side of the monitor firmly without applying
excessive pressure when lifting or moving the monitor.
· When lifting or moving the monitor, ensure the screen is facing away from
you and do not press on the display area to avoid any scratches or damage.
· When transporting the monitor, avoid any sudden shock or vibration to it.
30 About Your Monitor
· When lifting or moving the monitor, do not turn the monitor upside down
while holding the stand base or stand riser. This may result in accidental
damage to the monitor or cause personal injury.
Maintenance Guidelines
Cleaning Your Monitor Improper cleaning methods can result in physical damage
to Dell monitors. Physical defects may affect the screen and body of the
monitor.
CAUTION: Read and follow the Safety Instructions before cleaning the monitor.
WARNING: Before cleaning the monitor, unplug the monitor power cable from the
electrical outlet. For best practices, follow the instructions in the list
below when unpacking, cleaning, or handling your monitor: · To clean the Dell
Monitor screen, lightly dampen a soft, clean cloth with
water. If possible, use a special screen-cleaning tissue or solution suitable
for the Dell Monitor screen. CAUTION: Do not use detergents of any kind or
other chemicals such as benzene, thinner, ammonia, abrasive cleaners, or
compressed air. · Do not directly spray the cleaning solution or even water on
the surface of the monitor. Directly spraying liquid onto the panel will roll
down to the bottom of the panel and corrode the electronics resulting in
permanent damage. Instead, apply solution or water to soft cloth material.
About Your Monitor 31
NOTE: Using cleaner may cause changes in the appearance of the monitor, such
as color fading, milky film on the monitor, deformation, uneven dark shade,
and screen surface peeling. NOTE: Monitor damage due to improper cleaning
methods and the use of benzene, thinner, ammonia, abrasive cleaners, alcohol,
compressed air, detergent of any kind will lead to a Customer Induced Damage
(CID). CID is not covered under the standard Dell warranty. · If you notice
white powder when you unpack your monitor, wipe it off with a
cloth. · Handle your monitor with care as a darker-colored monitor may get
scratched
and show white scuff marks more than a lighter-colored monitor. · To help
maintain the best image quality on your monitor, use a dynamically
changing screen saver and turn off your monitor when not in use.
32 About Your Monitor
Setting Up the Monitor
Setting Up the Stand
NOTE: The stand is not factory-installed. NOTE: The following steps are
specifically for setting up the stand that is shipped with your monitor. If
you are attaching a stand that you purchased from any other source, follow the
set up instructions that were included with the stand. To set up the monitor
stand: 1. Follow the instructions on the flaps of packaging box to remove the
stand
from the top cushion that secures it. 2. Remove the stand base and stand riser
from the packaging cushion. C2423H
C2723H
Setting Up the Monitor 33
3. Align and place the stand riser on the stand base. 4. Open the screw
handle at the bottom of the stand base and turn it clockwise
to secure the stand assembly. 5. Close the screw handle.
6. Open the protective cover to access the VESA slot on the display. C2423H
34 Setting Up the Monitor
C2723H
NOTE: Before attaching the stand assembly to the display, ensure that the
front plate flap is opened to allow space for assembly. 7. Attach the stand
assembly to the display.
a. Align and slide the tabs on the stand riser into the VESA slot. b. Press
the stand down till it snaps into place. C2423H
Setting Up the Monitor 35
C2723H
8. Hold the stand riser with both hands firmly and lift the monitor. Then
place the monitor in an upright position on a flat surface.
NOTE: Hold the stand riser firmly when lifting the monitor to avoid any
accidental damage. C2423H
36 Setting Up the Monitor
C2723H 9. Lift the protective cover from the monitor.
Setting Up the Monitor 37
Operating the Monitor Webcam
When you want to use the monitor built-in webcam, press down on the webcam
module and then release. The webcam module will pop up.
Organizing Your Cables
After attaching all necessary cables to your monitor and computer (See
Connecting Your Monitor for cable attachment), organize all cables as shown
above. If your cable is not able to reach your PC, you may connect directly to
the PC without routing through the slot on the monitor stand. 38 Setting Up
the Monitor
Securing Your Monitor Using Kensington Lock (optional)
The security-lock slot is located at the bottom of the monitor (see Security
lock slot (based on Kensington Security SlotTM)). Secure your monitor to a
table using the Kensington security lock. For more information on using the
Kensington lock (sold separately), see the documentation that is shipped with
the lock.
NOTE: The image is for the purpose of illustration only. The appearance of the
lock may vary.
Connecting Your Monitor
WARNING: Before you begin any of the procedures in this section, follow the
Safety Instructions. NOTE: Dell monitors are designed to work optimally with
Dell supplied inbox cables. Dell does not guarantee the video quality and
performance when using non-Dell cables. NOTE: Route the cables through the
cable-management slot before connecting them. NOTE: Do not connect all cables
to the computer at the same time. NOTE: The graphics are used for the purpose
of illustration only. Appearance of the computer may vary. To connect your
monitor to the computer: 1. Turn Off your computer and disconnect the power
cable. 2. Connect the DisplayPort or HDMI cable from your monitor to the
computer.
Setting Up the Monitor 39
Connecting the HDMI Cable
NOTE: The default out of factory setting is HDMI 1.4. Connecting the
DisplayPort (DisplayPort to DisplayPort) Cable
NOTE: The default out of factory setting is DP1.2. If the monitor fails to
show any content after the DisplayPort cable is connected, follow the
procedures below to change the settings to DP1.1: · Press the joystick to open
the Menu Launcher. · Toggle the joystick to select Input Source. · Toggle the
joystick to highlight DP. · Press and hold the joystick for approximately 10
seconds, and the DisplayPort
configuration message appears. · Toggle the joystick to select Yes and then
press the joystick to save the
changes.
40 Setting Up the Monitor
Repeat the above steps to change the DisplayPort format settings if necessary.
Connecting the Monitor for DP Multi-Stream Transport (MST) Function
NOTE: This monitor supports the DP MST feature. To make use of this feature,
your PC Graphics Card must be certified to at least DP1.2 with MST option.
NOTE: Remove the rubber plug when using DP out connector. CAUTION: The
graphics are used for the purpose of illustration only. Appearance of the
computer may vary. If your monitor displays an image, installation is
complete. If it does not display an image, see Common Problems.
Setting Up the Monitor 41
Using the Tilt, Swivel, and Vertical Extension
NOTE: The following instructions are applicable only for attaching the stand
that was shipped with your monitor. If you are attaching a stand that you
purchased from any other source, follow the set up instructions that were
included with the stand. Tilt, Swivel With the stand attached to the monitor,
you can tilt and swivel the monitor for the most comfortable viewing angle.
NOTE: The stand is not installed at the factory when shipped.
42 Setting Up the Monitor
Vertical Extension NOTE: The stand extends vertically up to 150 mm. The figure
below illustrates how to extend the stand vertically.
Rotating the Monitor
Before you rotate the monitor, your monitor should be fully vertically
extended (Vertical Extension) and fully tilted up to avoid hitting the bottom
edge of the monitor.
Setting Up the Monitor 43
Rotate Clockwise
Rotate Counterclockwise
NOTE: To use the Display Rotation function (Landscape versus Portrait view)
with your Dell computer, you require an updated graphics driver that is not
included with this monitor. To download the graphics driver, go to
www.dell.com/support and see the Download section for Video Drivers for latest
driver updates. NOTE: When in the Portrait View Mode, you may experience
performance degradation in graphic-intensive applications (3D Gaming and
etc.). 44 Setting Up the Monitor
Adjusting the Rotation Display Settings of Your System
After you have rotated your monitor, you need to complete the procedure below
to adjust the Rotation Display Settings of your system.
NOTE: If you are using the monitor with a non-Dell computer, you need to go
the graphics driver website or your computer manufacturer website for
information on rotating the ‘contents’ on your display. To adjust the Rotation
Display Settings: 1. Right-click on the desktop and click Properties. 2.
Select the Settings tab and click Advanced. 3. If you have an ATI graphics
card, select the Rotation tab and set the
preferred rotation. 4. If you have an nVidia graphics card, click the nVidia
tab, in the left-hand
column select NVRotate, and then select the preferred rotation. 5. If you have
an Intel® graphics card, select the Intel graphics tab, click
Graphic Properties, select the Rotation tab, and then set the preferred
rotation. NOTE: If you do not see the rotation option or it is not working
correctly, go to www.dell.com/support and download the latest driver for your
graphics card. NOTE: You can also refer to the Rotation function on your OSD
to rotate your display.
Setting Up the Monitor 45
Removing the Monitor Stand
NOTE: To prevent scratches on the LCD screen when removing the stand, ensure
that the monitor is placed on a soft, clean surface. NOTE: The following
instructions are applicable only for attaching the stand that was shipped with
your monitor. If you are attaching a stand that you purchased from any other
source, follow the set up instructions that were included with the stand.
To remove the stand: 1. Place the monitor on a soft cloth or cushion. 2. Press
and hold the stand release button. 3. Lift the stand up and away from the
monitor.
VESA Wall Mounting (optional)
(Screw dimension: M4 x 10 mm). Refer to the instructions that come with the
VESA-compatible wall mounting kit.
1. Place the monitor panel on a soft cloth or cushion on a stable flat table.
2. Remove the stand. (See Removing the Monitor Stand)
46 Setting Up the Monitor
3. Use a Phillips crosshead screwdriver to remove the four screws securing
the plastic cover.
4. Attach the mounting bracket from the wall mounting kit to the monitor. 5.
Mount the monitor on the wall. For more information, see the documentation
that shipped with the wall mounting kit. NOTE: For use only with UL or CSA or
GS-listed wall mount bracket with minimum weight or load bearing capacity of
15.32 kg (C2423H)/ 20.16 kg (C2723H).
Setting Up the Monitor 47
Operating the Monitor
Enable Menu Voice Function
This is an accessibility feature for people who are visually impaired. This
feature can also be disabled in the Main Menu.
1. Press the Power button to turn On the monitor.
2. Connect the Dell Monitor Text to Speech User Interface Module TS23
(provided separately) to the USB port marked CVAA located at the back of the
monitor.
3. Use the joystick as shown below to navigate through the Easy Initial
Setup. Press the joystick to enter.
48 Operating the Monitor
4. Follow the steps in the Easy Initial Step shown on screen to enable the
Menu Voice function.
NOTE: After setting up, you may press and hold the joystick for 3 seconds to
deactivate or re-activate the Menu Voice. NOTE: The following functions will
be disabled when Menu Voice is On:
– Menu Lock – Language For additional information, please go to
https://www.dell.com/learn/us/en/ uscorp1/policies-website-accessibility.
NOTE: Menu Voice function is only available in North America Region on C2423H
with TS23 (provided separately upon request).
Operating the Monitor 49
Using the Joystick Control
To modify the OSD adjustments using the joystick control on the rear end of
the monitor, do the following:
1. Press the joystick button to launch the OSD Menu Launcher. 2. Move the
joystick up/down/left/right to toggle between the OSD menu
options.
Joystick Functions Function
Description Press joystick to open the OSD Menu Launcher.
· For right and left navigation. · Move right to enter the submenu. · Move
left to exit from the submenu. · For up and down navigation. · Toggle between
the menu items. · Increases (up) or decreases (down) the parameters
of the selected menu item.
50 Operating the Monitor
Using the Main Menu
Using the Menu Launcher Press the joystick to open the OSD Menu Launcher.
Menu Launcher The following table describes the Menu Launcher functions: Menu Launcher Details
Menu Launcher Icon
Main Menu
Aspect Ratio (Shortcut Key 1)
Input Source (Shortcut Key 2)
Description Opens the On-Screen Display (OSD). See Accessing the Menu System
(Menu Voice Off).
Adjusts the aspect ratio of your screen.
· Sets the Input Source. · Select Auto from Input Source menu to scan
for available input sources.
Operating the Monitor 51
Preset Modes (Shortcut Key 3)
Brightness/Contrast (Shortcut Key 4)
Allows you to choose from a list of preset color modes.
Select this icon to adjust the brightness and contrast level.
Displays the monitor’s current status.
Display Info (Shortcut Key 5)
Exits from the OSD main menu.
Exit
NOTE: You can set your preferred Shortcut Key. See Personalize for details.
Using the Navigation keys When the OSD main menu is active, move the joystick
to configure the settings, following the navigation keys displayed below the
OSD.
After you change the settings, press the joystick to save the changes before
proceeding to another menu or exit the OSD menu.
NOTE: To exit the current menu item and return to the previous menu, move the
joystick to the left until you exit.
52 Operating the Monitor
Using the On-Screen Display (OSD) menu
NOTE: North America Region only. Accessing the Menu System (Menu Voice On)
Icon
Menu and
Submenus
Description
Brightness/ Activates Brightness/Contrast adjustment. Contrast
Brightness Contrast
Adjusts the luminance of the backlight.
Toggle the joystick up to increase the brightness and toggle the joystick down
to decrease the brightness (Range: 0 – 100).
Adjusts the Brightness first, and then adjust the Contrast only if further
adjustment is necessary.
Toggle the joystick up to increase the contrast and toggle the joystick down
to decrease the contrast (Range: 0 – 100).
The Contrast function adjusts the degree of difference between darkness and
lightness on the monitor screen.
Operating the Monitor 53
Input Source Selects between the different video signals that may be connected to your monitor.
DP
Select the DP input when you are using the
DisplayPort (DP) connector. Press the joystick to
confirm the selection.
HDMI
Select the HDMI input when you are using the HDMI connector. Press the joystick to confirm the selection.
Auto Select Allows you to scan for available input sources. The default is On.
Rename Inputs Allows you to select the input name for the selected input source. The options are PC, PC 1, PC 2, Laptop, Laptop 1, and Laptop 2.
NOTE: Input names in warning messages and Display Info will not be changed.
Reset Input Press the joystick to reset all settings under the
Source
Input Source menu to the factory preset values.
54 Operating the Monitor
Color
Adjusts the color setting mode.
Preset Modes Allows you to choose from a list of preset color modes.
· Standard: Default Color setting. This monitor uses a low blue light panel,
and is certified by TUV to reduce blue light output and create a more relaxing
and less stimulating image while reading content on the screen.
· Movie: Ideal for movies. · Game: Ideal for most gaming applications. · Warm:
Presents colors at lower color
temperatures. The screen appears warmer with a red/yellow tint.
Operating the Monitor 55
Input Color Format
· Cool: Presents colors at higher color temperatures. The screen appears
cooler with a blue tint.
· Custom Color: Allows you to manually adjust the color settings.
Toggle the joystick up or down to adjust the RGB color values and create your
own preset color mode.
Allows you to set the video input mode to:
· RGB: Select this option if your monitor is connected to a computer or a
media player that supports RGB output.
· YCbCr: Select this option if your media player supports only YCbCr output.
Press the joystick to confirm the selection.
Hue
Shifts the color of the video image to green or
purple. This is used to adjust the desired flesh tone
color. Toggle the joystick up or down to adjust the
hue from ‘0’ to ‘100’.
NOTE: Hue adjustment is available only when you select Movie or Game preset mode.
56 Operating the Monitor
Saturation
Reset Color Display
Adjusts the color saturation of the video image. Toggle the joystick up or
down to adjust the saturation from ‘0’ to ‘100’.
NOTE: Saturation adjustment is available only when you select Movie or Game
preset mode.
Press the joystick to reset all settings under the Color menu to the factory
preset values.
Use the Display menu to adjust images.
Aspect Ratio Adjusts the image ratio to 16:9, 4:3, or 5:4.
Sharpness
This feature can make the image look sharper or softer.
Toggle the joystick up or down to adjust the sharpness from ‘0’ to ‘100’.
Response Time Allows you to set the Response Time to Normal or Fast.
MST
DP Multi Stream Transport, select On to enable MST (DP Out), select Off to disable the MST function. See Connecting the Monitor for DP Multi-Stream Transport (MST) Function for details.
NOTE: When DP upstream cable and DP downstream cable are connected, the OSD will set MST to On automatically. This action will only be done once after Factory Reset or Display Reset.
Operating the Monitor 57
Reset Display
Audio & Webcam
Press the joystick to reset all settings under the Display menu to the factory
preset values.
Allows you to adjust audio and webcam settings.
Volume
Speaker Microphone
Webcam Audio Profiles
Reset Audio & Webcam
NOTE: For Webcam and Microphone to work, connect the USB upstream cable from
the PC to the monitor.
Allows you to increase the speaker volume. Move the joystick up and down to
adjust the volume from 0′ to100′.
Select to Mute or Unmute the Speaker.
Select to Mute or Unmute the Microphone.
Select to Enable or Disable the Webcam.
Allows you to choose from a list of preset audio profiles. · Standard: Default
audio setting. · Voice: Load profile ideal for meetings. · Movie: Load profile
ideal for movies. · Game: Load profile ideal for gaming. · Music: Load profile
ideal for listening to music.
Press the joystick to reset all settings under the Audio & Webcam menu to the
factory preset values.
58 Operating the Monitor
Menu
Select this option to adjust the settings of the OSD, such as, the languages of the OSD, the amount of time the menu remains on screen, and so on.
Rotation Transparency
Timer Reset Menu
Press the joystick to rotate the OSD and the screen by 0/90/180/270 degrees.
You can adjust the menu according to your display rotation.
Select this option to change the menu transparency by toggling the joystick up
or down (Range: 0 – 100).
Sets the length of time the OSD will remain active after the last time you
pressed a button.
Toggle the joystick up or down to adjust the slider in 1 second increments,
from 5 to 60 seconds.
Press the joystick to reset all settings under the Menu menu to the factory
preset values.
Operating the Monitor 59
Personalize
Shortcut Key 1 Shortcut Key 2 Shortcut Key 3 Shortcut Key 4 Shortcut Key 5
Allows you to choose a feature from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio, Volume, Speaker, Microphone, Webcam, Rotation, or Display Info and set it as a shortcut key.
Power Button Allows you to set the power LED indicator on or off
LED
to save energy.
USB
Allows you to enable or disable USB Type-A Downstream Ports charging function during monitor standby mode.
Reset
Press the joystick to reset all settings under the
Personalization Personalize menu to the factory preset values.
60 Operating the Monitor
Others
Select this option to adjust the OSD settings, such as DDC/CI, LCD Conditioning, and so on.
Display Info Press the joystick to display the monitor’s current settings.
Operating the Monitor 61
DDC/CI
DDC/CI (Display Data Channel/Command Interface) allows your monitor parameters (brightness, color balance, and etc.) to be adjustable via the software on your computer. You can disable this feature by selecting Off. Enable this feature for best user experience and optimum performance of your monitor.
LCD Conditioning
Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. You can enable this feature by selecting On.
Firmware Displays the firmware version of your monitor. 62 Operating the Monitor
Service Tag
Displays the service tag of your monitor. This string is required when you look for phone support, check your warranty status, update drivers on Dell’s website, etc.
Self-Diagnostic Press the joystick to initiate the self-diagnostic process.
1. When initiated, a gray screen appears.
2. Carefully inspect the screen for abnormalities.
3. Press the joystick. The color of the screen changes to red.
4. Inspect the display for any abnormalities.
5. Repeat steps 3 and 4 to inspect the display in green, blue, black, white and text screens.
The test is complete when the text screen appears. To exit, press the joystick again.
Menu Voice
This is accessibility feature for people who are visually impaired. You can enable this feature by selecting On.
Reset Others Press the joystick to reset all settings under the Others menu to
the factory preset values.
Operating the Monitor 63
Factory Reset
Restore all preset values to the factory default settings. These are also the settings for ENERGY STAR® tests.
Accessing the Menu System (Menu Voice Off)
Icon
Menu and Submenus
Description
Brightness/ Activates Brightness/Contrast adjustment. Contrast
Brightness
Adjusts the luminance of the backlight.
Toggle the joystick up to increase the brightness and toggle the joystick down
to decrease the brightness (Range: 0 – 100).
64 Operating the Monitor
Contrast Input Source
Adjusts the Brightness first, and then adjust the Contrast only if further
adjustment is necessary.
Toggle the joystick up to increase the contrast and toggle the joystick down
to decrease the contrast (Range: 0 – 100).
The Contrast function adjusts the degree of difference between darkness and
lightness on the monitor screen.
Selects between the different video signals that may be connected to your
monitor.
DP HDMI Auto Select Rename Inputs
Select the DP input when you are using the DisplayPort (DP) connector. Press
the joystick to confirm the selection.
Select the HDMI input when you are using the HDMI connector. Press the
joystick to confirm the selection.
Allows you to scan for available input sources. The default is On.
Allows you to select the input name for the selected input source. The options
are PC, PC 1, PC 2, Laptop, Laptop 1, and Laptop 2.
NOTE: Input names in warning messages and Display Info will not be changed.
Operating the Monitor 65
Reset Input Source
Color
Press the joystick to reset all settings under the Input Source menu to the
factory preset values.
Adjusts the color setting mode.
Preset Modes Allows you to choose from a list of preset color modes.
· Standard: Default Color setting. This monitor uses a low blue light panel,
and is certified by TUV to reduce blue light output and create a more relaxing
and less stimulating image while reading content on the screen.
66 Operating the Monitor
Input Color Format
· Movie: Ideal for movies.
· Game: Ideal for most gaming applications.
· Warm: Presents colors at lower color temperatures. The screen appears warmer
with a red/yellow tint.
· Cool: Presents colors at higher color temperatures. The screen appears
cooler with a blue tint.
· Custom Color: Allows you to manually adjust the color settings.
Toggle the joystick up or down to adjust the RGB color values and create your
own preset color mode.
Allows you to set the video input mode to:
· RGB: Select this option if your monitor is connected to a computer or a
media player that supports RGB output.
· YCbCr: Select this option if your media player supports only YCbCr output.
Press the joystick to confirm the selection.
Operating the Monitor 67
Hue
Saturation Reset Color
Display
Shifts the color of the video image to green or purple. This is used to adjust
the desired flesh tone color. Toggle the joystick up or down to adjust the hue
from ‘0’ to ‘100’.
NOTE: Hue adjustment is available only when you select Movie or Game preset
mode.
Adjusts the color saturation of the video image. Toggle the joystick up or
down to adjust the saturation from ‘0’ to ‘100’.
NOTE: Saturation adjustment is available only when you select Movie or Game
preset mode.
Press the joystick to reset all settings under the Color menu to the factory
preset values.
Use the Display menu to adjust images.
Aspect Ratio Sharpness
Response Time
Adjusts the image ratio to 16:9, 4:3, or 5:4.
This feature can make the image look sharper or softer.
Toggle the joystick up or down to adjust the sharpness from ‘0’ to ‘100’.
Allows you to set the Response Time to Normal or Fast.
68 Operating the Monitor
MST
Reset Display Audio & Webcam
DP Multi Stream Transport, select On to enable MST (DP Out), select Off to
disable the MST function. See Connecting the Monitor for DP Multi-Stream
Transport (MST) Function for details.
NOTE: When DP upstream cable and DP downstream cable are connected, the OSD
will set MST to On automatically. This action will only be done once after
Factory Reset or Display Reset.
Press the joystick to reset all settings under the Display menu to the factory
preset values.
Allows you to adjust audio and webcam settings.
Volume
Speaker Microphone
Webcam Audio Profiles
NOTE: For Webcam and Microphone to work, connect the USB upstream cable from
the PC to the monitor.
Allows you to increase the speaker volume. Move the joystick up and down to
adjust the volume from 0′ to100′.
Select to Mute or Unmute the Speaker.
Select to Mute or Unmute the Microphone.
Select to Enable or Disable the Webcam.
Allows you to choose from a list of preset audio profiles. · Standard: Default
audio setting.
Operating the Monitor 69
Reset Audio & Webcam
Menu
· Voice: Load profile ideal for meetings. · Movie: Load profile ideal for
movies. · Game: Load profile ideal for gaming. · Music: Load profile ideal for
listening to music.
Press the joystick to reset all settings under the Audio & Webcam menu to the
factory preset values.
Select this option to adjust the settings of the OSD, such as, the languages
of the OSD, the amount of time the menu remains on screen, and so on.
Language Rotation
Transparency Timer
Sets the OSD display to one of the eight languages (English, Spanish, French,
German, Brazilian Portuguese, Russian, Simplified Chinese, or Japanese).
Press the joystick to rotate the OSD and the screen by 0/90/180/270 degrees.
You can adjust the menu according to your display rotation.
Select this option to change the menu transparency by toggling the joystick up
or down (Range: 0 – 100).
Sets the length of time the OSD will remain active after the last time you
pressed a button.
Toggle the joystick up or down to adjust the slider in 1 second increments,
from 5 to 60 seconds.
70 Operating the Monitor
Lock
With the control buttons on the monitor locked, you can prevent people from accessing the controls. It also prevents accidental activation in multiple monitors side-by-side setup.
Reset Menu
· Menu Buttons: All joystick functions are locked and not accessible by the
user.
· Power Button: Only the Power Button is locked and not accessible by the
user.
· Menu + Power Buttons: Both the joystick & the Power Button are locked and
not accessible by the user.
The default setting is Disable.
Alternative Lock Method [for Menu/function buttons]: You can also press and
hold the joystick to the up or down or left or right for 4 seconds to set the
lock options.
NOTE: To unlock the button(s), press and hold the joystick to the up or down
or left or right for 4 seconds.
Press the joystick to reset all settings under the Menu menu to the factory
preset values.
Operating the Monitor 71
Personalize
Shortcut Key 1 Shortcut Key 2 Shortcut Key 3 Shortcut Key 4 Shortcut Key 5
Allows you to choose a feature from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio, Volume, Speaker, Microphone, Webcam, Rotation, or Display Info and set it as a shortcut key.
Power Button Allows you to set the power LED indicator on or off
LED
to save energy.
USB
Allows you to enable or disable USB Type-A Downstream Ports charging function during monitor standby mode.
Reset
Press the joystick to reset all settings under the
Personalization Personalize menu to the factory preset values.
72 Operating the Monitor
Others
Select this option to adjust the OSD settings, such as DDC/CI, LCD Conditioning, and so on.
Display Info Press the joystick to display the monitor’s current settings.
Operating the Monitor 73
DDC/CI
DDC/CI (Display Data Channel/Command Interface) allows your monitor parameters (brightness, color balance, and etc.) to be adjustable via the software on your computer. You can disable this feature by selecting Off. Enable this feature for best user experience and optimum performance of your monitor.
LCD Conditioning
Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. You can enable this feature by selecting On.
Firmware Displays the firmware version of your monitor. 74 Operating the Monitor
Service Tag
Displays the service tag of your monitor. This string is required when you look for phone support, check your warranty status, update drivers on Dell’s website, etc.
Self-Diagnostic Press the joystick to initiate the self-diagnostic process.
6. When initiated, a gray screen appears.
7. Carefully inspect the screen for abnormalities.
8. Press the joystick. The color of the screen changes to red.
9. Inspect the display for any abnormalities.
10.Repeat steps 3 and 4 to inspect the display in green, blue, black, white and text screens.
The test is complete when the text screen appears. To exit, press the joystick again.
Reset Others Press the joystick to reset all settings under the Others menu to the factory preset values.
Factory Reset
Restore all preset values to the factory default settings. These are also the settings for ENERGY STAR® tests.
Operating the Monitor 75
OSD Messages
Initial Setup When Factory Reset is selected, the following message appears:
When Yes is selected, the following message appears.
OSD Warning Messages When the monitor does not support a particular resolution
mode, you will see the following message:
76 Operating the Monitor
This means that the monitor cannot synchronize with the signal that it is
receiving from the computer. See Monitor Specifications for the Horizontal and
Vertical frequency ranges addressable by this monitor. Recommended mode is
1920 x 1080. NOTE: The message may be slightly different according to the
connected input signal. You will see the following message before the DDC/CI
function is disabled:
When you adjust the Brightness level for the first time, the following message
appears:
NOTE: If Yes is selected, the message will not appear next time you intend to
change the Brightness setting. When you change the default setting of power
saving features for the first time, such as USB, the following message
appears:
Operating the Monitor 77
NOTE: If you select Yes for any one of the features mentioned above, the
message will not appear next time you intend to change the settings of these
features. When you perform a factory reset, the message will appear again. You
will see the following message before the Lock function is activated:
NOTE: The message may be slightly different according to the selected
settings. When the monitor goes into Standby mode, the following message
appears:
Activate the computer and wake up the monitor to gain access to the OSD. NOTE:
The message may be slightly different according to the connected input signal.
78 Operating the Monitor
The OSD functions only in the normal operation mode. If you press any button
other than the Power Button during the Standby mode, the following message
will appear depending on the selected input:
NOTE: The message may be slightly different according to the connected input
signal. Activate the computer and the monitor to gain access to the OSD. NOTE:
The message may be slightly different according to the connected input signal.
If either DisplayPort or HDMI input is selected and the corresponding cable is
not connected, a dialog box as shown below appears.
or
NOTE: The message may be slightly different according to the connected input
signal.
Operating the Monitor 79
When Disable is selected for the Webcam, the following message appears:
When the Webcam is disabled and the webcam module pop up, the following
message appears:
NOTE: For Webcam and Microphone to work, connect the USB upstream cable from
the PC to the monitor. See Troubleshooting for more information.
80 Operating the Monitor
Setting the Maximum Resolution
NOTE: The steps may vary slightly depending on the version of Windows you
have. To set the maximum resolution for the monitor: In Windows 7, Windows 8,
and Windows 8.1: 1. For Windows 8 and Windows 8.1 only, select the Desktop
tile to switch to
classic desktop. 2. Right-click on the desktop and click Screen Resolution. 3.
f you have more than one monitor connected, ensure that you select
C2423H/C2723H. 4. Click the Screen Resolution dropdown list and select 1920 x
1080. 5. Click OK. In Windows 10 and Windows 11: 1. Right-click on the desktop
and click Display settings. 2. If you have more than one monitor connected,
ensure to select C2423H/
C2723H. 3. Click the Display Resolution dropdown list and select 1920 x 1080.
4. Click Keep changes. If you do not see 1920 x 1080 as an option, you must
update your graphics driver to the latest version. Depending on your computer,
complete one of the following procedures: If you have a Dell desktop or
laptop: · Go to https://www.dell.com/support, enter your service tag, and
download
the latest driver for your graphics card. If you are using a non-Dell computer
(laptop or desktop):
· Go to the support site for your computer and download the latest graphic
drivers.
· Go to your graphics card website and download the latest graphic drivers.
Operating the Monitor 81
Setting Up Windows Hello
In Windows® 10: Click Windows Start menu, click Settings. Click Accounts.
Click Sign-in options. You must set up a PIN before you can enroll in Windows
Hello.
82 Operating the Monitor
Click Add under PIN and enter to Set up a PIN. Enter New PIN and Confirm PIN,
and then click OK. Once you have done that, the options to set up Windows
Hello will unlock. Click Set up under Windows Hello, enter to Windows Hello
setup.
Operating the Monitor 83
The following message is displayed, click Get started.
Keep looking directly at your screen and position yourself so that your face
is in the center of the frame that appears on screen. The webcam will then
register your face.
84 Operating the Monitor
When the following message is displayed, click Close to exit Windows Hello
setup.
Once you have set up, you have another option to improve the recognition.
Click Improve recognition if necessary.
Operating the Monitor 85
Setting Up the Monitor Webcam as Default Setting
When using a notebook with built-in webcam to connect this monitor, in the
device manager interface, you can find the notebook built-in webcam and the
monitor webcam. Normally, they are in enable status, and the default setting
is using notebook built-in webcam.
If you want to set up the monitor webcam as default setting, you need to
disable the notebook built-in webcam. To identify the notebook built-in webcam
and disable it, please follow below instruction: Right-click DELL Monitor IR
Webcam, and click Properties to open the DELL Monitor IR Webcam Properties.
86 Operating the Monitor
Click Details > Property and select Hardware Ids. Operating the Monitor 87
The Value will show the detail hardware ids of this DELL Monitor IR Webcam.
The hardware ids of the notebook built-in webcam and the monitor webcam are
different. For C2423H/C2723H, the monitor webcam hardware ids will show as
below:
Right-click the PC/Notebook webcam, which has different hardware ids, and then
click Disable.
The following message is displayed:
88 Operating the Monitor
Click Yes. The notebook webcam is now disabled and the monitor webcam will be
used as the default setting. Restart the notebook.
Operating the Monitor 89
Setting Up the Monitor Speaker as Default Setting
When your computer connects multiple speakers, if you want to setup the
monitor speaker as default setting, please follow below instructions: Right-
click Volume in the Windows task bar notification area. Click Sounds to enter
to Sound setting interface.
If only the HDMI or DP cable is connected from your monitor to the computer,
only one speaker named DELL C2423H/C2723H from the monitor will show in the
Sound setting interface.
90 Operating the Monitor
Click DELL C2423H/C2723H, and then click Set Default, the monitor speaker will
be used as the default setting.
Click OK to exit the Sound setting.
If the USB cable and the HDMI or DP cable are connected from the monitor to
the computer, two audio paths named DELL C2423H/C2723H and Echo Cancelling
Speakerphone (C2423H/C2723H) from the monitor will show in the Sound setting
interface. The DELL C2423H/C2723H monitor would show options for two audio
paths supported in the monitor.
Operating the Monitor 91
· Echo Cancelling Speakerphone (C2423H/C2723H) audio path is where audio
streams through USB. This is through USB-A to USB-B cable. As the microphone
path streams from monitor back to PC through USB, this selection is required
for VoIP/UC conference applications. Audio Recording and Playback will work
under this selection.
· DELL C2423H/C2723H audio path is where audio streams through HDMI/ DP. Under
this selection, there will not be microphone support. This selection is
suitable for Audio Playback only.
Audio Playback performance would be the same for either audio path selection.
Under normal Playback with USB-A to USB-B and/or for UC conference
applications, default selecting the Echo Cancelling Speakerphone (C2423H/
C2723H) audio path is recommended.
NOTE: If you select DELL C2423H/C2723H audio path, please ensure that the Echo
Cancelling Speakerphone (C2423H/C2723H) volume is set to medium or high. Else,
the DELL C2423H/C2723H maximum volume may sound soft because it is limited by
the Echo Cancelling Speakerphone (C2423H/C2723H) volume. For example, when the
Echo Cancelling Speakerphone (C2423H/C2723H) volume is at 50%, and the DELL
C2423H/C2723H volume is set to 100%, the DELL C2423H/ C2723H will have the
same sound level as the former.
92 Operating the Monitor
Troubleshooting
WARNING: Before you begin any of the procedures in this section, follow the
Safety Instructions.
Se l f-test
Your monitor provides a self-test feature that allows you to check whether
your monitor is functioning properly. If your monitor and computer are
properly connected but the monitor screen remains dark, run the monitor self-
test by performing the following steps:
1. Turn off both your computer and the monitor. 2. Unplug the video cable
from the back of the computer. 3. Turn on the monitor. The floating dialog box
should appear on-screen (against a black background), if the monitor cannot
sense a video signal and is working correctly. While in self-test mode, the
power LED remains white. Also, depending upon the selected input, one of the
dialogs shown below will continuously scroll through the screen.
or
NOTE: The message may be slightly different according to the connected input
signal. 4. This box also appears during normal system operation, if the video
cable
becomes disconnected or damaged. 5. Turn Off your monitor and reconnect the
video cable; then turn On both your
computer and the monitor.
Troubleshooting 93
If your monitor screen remains blank after you use the previous procedure,
check your video controller and computer, because your monitor is functioning
properly.
Using the Joystick to Lock/Unlock Buttons
Locking the Power and Joystick Buttons You can lock the joystick and Power
buttons to prevent access to the OSD menu and/or power off the monitor. To
lock the buttons:
1. Toggle and hold the joystick to the up or down or left or right for about
4 seconds until a pop menu appears.
2. Select one of the following options: · Menu Buttons: All joystick
functions are locked and not accessible by the user. · Power Buttons: Only the
Power Button is locked and not accessible by the user. · Menu + Power Buttons:
Both the joystick & the Power Button are locked and not accessible by the
user.
94 Troubleshooting
To unlock the button(s), press and hold the joystick to the up or down or left
or right for 4 seconds. Select the Unlock icon to unlock the button(s).
Updating Monitor Firmware
You may verify your current firmware revision in Firmware. If this is not
available, go to the Dell download support site for the latest application
installer (Monitor Firmware Update Utility.exe) and refer to the Firmware
Update Instruction User’s Guide: www.dell.com/C2423H, www.dell.com/C2723H.
Troubleshooting 95
Common Problems
The following table contains general information about common monitor problems
you might encounter and the possible solutions:
Common Symptoms No Video/Power LED off
No Video/Power LED on
Poor Focus
Shaky/Jittery Video
What You Experience
Possible Solutions
No picture
· Ensure that the video cable connecting the monitor and the computer is properly connected and secure.
· Verify that the power outlet is functioning properly using any other electrical equipment.
· Ensure that the Power Button is pressed fully.
· Ensure that the correct input source is selected in the Input Source menu.
No picture or no · Increase brightness & contrast
brightness
controls via OSD.
· Perform monitor self-test feature check.
· Check for bent or broken pins in the video cable connector.
· Run the built-in diagnostics.
· Ensure that the correct input source is selected in the Input Source menu.
Picture is fuzzy, · Eliminate video extension cables. blurry, or ghosting · Reset the monitor to factory settings.
· Change the video resolution to the correct aspect ratio.
Wavy picture or fine movement
· Reset the monitor to factory settings. · Check environmental factors.
· Relocate the monitor and test in another room.
96 Troubleshooting
Missing Pixels
Stuck-on Pixels
Brightness Problems Geometric Distortion Horizontal/ Vertical Lines
LCD screen has spots
· Cycle power On-Off.
· Pixel that is permanently Off is a natural defect that can occur in LCD
technology.
· For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: http:// www.del l.com/pixelguidel ines.
LCD screen has bright spots
· Cycle power On-Off.
· Pixel that is permanently off is a natural defect that can occur in LCD
technology.
· For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: http:// www.del l.com/pixelguidel ines.
Picture too dim or · Reset the monitor to factory settings.
too bright
· Adjust brightness & contrast controls
via OSD.
Screen not
· Reset the monitor to factory settings.
centered correctly
Screen has one or more lines
· Reset the monitor to factory settings.
· Perform monitor self-test feature check and determine if these lines are
also in self-test mode.
· Check for bent or broken pins in the video cable connector.
· Run the built-in diagnostics.
Troubleshooting 97
Synchronization Problems
Safety Related Issues Intermittent Problems
Missing Color
Wrong Color
Screen is scrambled or appears torn
· Reset the monitor to factory settings.
· Perform monitor self-test feature check to determine if the scrambled screen
appears in self-test mode.
· Check for bent or broken pins in the video cable connector.
· Restart the computer in the safe mode.
Visible signs of · Do not perform any troubleshooting
smoke or sparks
steps.
· Contact Dell immediately.
Monitor
· Ensure that the video cable
malfunctions on & connecting the monitor to the
off
computer is connected properly and is
secure.
· Reset the monitor to factory settings.
· Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.
Picture missing color
· Perform monitor self-test feature check.
· Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
· Check for bent or broken pins in the video cable connector.
Picture color not good
· Try different Preset Modes in Color settings OSD. Adjust the R/G/B value in Custom Color in Color settings OSD.
· Change the Input Color Format to RGB or YCbCr/YPbPr in the Color settings OSD.
· Run the built-in diagnostics.
98 Troubleshooting
Image retention from a static image left on the monitor for a long period of
time
Webcam/Mic does not work
Faint shadow from the static image displayed appears on the screen
· USB cable not plug in or not select the correct USB source
· Not set the monitor webcam/mic as the default device
· Set the screen to turn off after a few minutes of screen idle time. These
can be adjusted in Windows Power Options or Mac Energy Saver setting.
· Alternatively, use a dynamically changing screensaver.
· Plug in the USB Cable (Type-A to Type-B).
· Select the monitor Webcam/Mic as the default in the PC side.
Product Specific Problems
Common Symptoms
What You Experience
Possible Solutions
Screen image is too Image is centered on · Check the Aspect Ratio setting in
smal l
screen, but does not the Display menu OSD.
fill entire viewing area
· Reset the monitor to factory settings.
Cannot adjust the monitor with the joystick control on the rear of the monitor
OSD does not
·
appear on the screen
·
Turn Off the monitor, unplug the power cord, plug it back, and then turn On
the monitor.
Check whether the OSD menu is locked. If yes, toggle and hold the joystick to
any direction for 4 seconds to unlock (for more information, see Lock).
Troubleshooting 99
No Input Signal No picture, the LED when user controls light is white are pressed
· Check the signal source. Ensure the computer is not in the standby mode by moving the mouse or pressing any key on the keyboard.
· Check whether the signal cable is plugged in properly. Re-plug the signal cable if necessary.
· Reset the computer or video player.
The picture does not fill the entire screen
The picture cannot · Due to different video formats
fill the height or
(aspect ratio) of DVDs, the monitor
width of the screen may display in full screen.
· Run the built-in diagnostics.
No video at HDMI/ When connected to Unplug the HDMI/DisplayPort cable
DisplayPort port some dongle/
from dongle/docking device, then plug
docking device at the docking Thunderbolt cable to the
the port, there is no notebook. Plug the HDMI/DisplayPort
video when
cable 7 seconds later.
unplugging/plugging
the Thunderbolt
cable from the
notebook
Monitor buttons Monitor buttons
Use Microsoft Teams® App to perform
(Speaker mute/ (Speaker mute/
the below tasks:
Volume down/ Volume down/
Volume up/
Volume up/
Microphone mute) Microphone mute)
not working with not working on
· Call Icon to accept / hang up call
· Volume down / Volume up adjustment
Microsoft Teams® Microsoft Teams® · Mic mute / unmute
App
App with Chrome OS · Camera on / off
/ Ubuntu
Video recording not working
Video recording App · Windows 7 not supported not working with Win · Switch to Windows 10 7
100 Troubleshooting
Headset with Mic Headset with Mic Use UC App Mic icon to mute / unmute (3.5 mm
combo (3.5 mm combo jack) jack) not working has no response with monitor mute
when pressing the / unmute button monitor mute /
unmute button while using UC App
When press either When press either Connect USB upstream (USB A to B)
Volume down / Volume down /
cable
Volume up or Mute Volume up or Mute
button, LED not button, LED not blink
blink
when connected to
HDMI or DP only
Camera or Mic not Camera or Mic not
working
working when
connected to HDMI
or DP only
Connect USB upstream (USB A to B) cable
Microphone not working or not detected
Microphone not working or not detected on the Voice recorder App with Intel Gen 11th CPU (Tiger Lake) platform
· Disable Intel Smart Sound Technology for USB Audio driver in the Device
Manager and re-boot the PC
· Alternatively, download the latest Audio Driver version for your computer or
notebook
· Unplug the 2-ring headphone from the headphone jack. Plug in a 3-ring headphone, or use the built-in microphone
· Unplug the 2-ring microphone from the headphone jack as this is not supported. Use the built-in microphone instead
Troubleshooting 101
No sound can be heard from recorded video
No sound can be · Disable Intel Smart Sound
heard from recorded Technology for USB Audio driver in
video with Intel Gen the Device Manager and re-boot the
11th CPU (Tiger
PC
Lake) platform
· Alternatively, download the latest
Audio Driver version for your
computer or notebook
When pressing When pressing either · Disable Intel Smart Sound
either Volume
Volume down /
Technology for USB Audio driver in
down / Volume up, Volume up, OSD
the Device Manager and re-boot the
OSD volume bar volume bar response PC
response is lagging/delayed
is lagging/delayed · Alternatively, download the latest
with monitor
Audio Driver version for your
connected to Intel
computer or notebook
Gen 11th CPU (Tiger
Lake) platform
No sound coming from the speakers
No sound coming · from the speakers when play audio/ video on your system
Ensure that you have set the default playback device as Echo Cancelling Speakerphone (C2423H/C2723H) or DELL C2423H/C2723H on your system.
· Turn Off the monitor, unplug the monitor power cord, replug it, and then turn On the monitor.
· Reset the monitor to Factory Settings.
102 Troubleshooting
Speaker volume is low / sounds soft
Speaker volume is · low / sounds soft when speaker option is DELL C2423H/ · C2723H in Sound setting interface
Increase the speaker volume of DELL C2423H/C2723H to maximum in the Sound
setting interface.
Press the Volume Up button to increase the speaker volume of DELL
C2423H/C2723H.
· If you select DELL C2423H/C2723H audio path, please ensure that the Echo Cancelling Speakerphone (C2423H/C2723H) volume is set to medium or high. Else, the DELL C2423H/C2723H maximum volume may sound soft because it is limited by the Echo Cancelling Speakerphone (C2423H/C2723H) volume. For example, when the Echo Cancelling Speakerphone (C2423H/ C2723H) volume is at 50%, and the DELL C2423H/C2723H volume is set to 100%, the DELL C2423H/C2723H will have the same sound level as the former.
Webcam is not detected
Webcam is not detected in the Windows Device Manager
· Ensure that the USB upstream cable is connected between the monitor and the
computer or notebook.
· Reconnect the USB upstream cable to the computer or notebook.
Webcam cannot Could not detect
connect / Webcam Monitor camera /
disconnected
Could not switch
back to the PC
camera
· Reset the monitor to Factory Settings.
· Turn Off the monitor, unplug the monitor power cord, replug it, and then
turn On the monitor.
· Select the Monitor camera again in the Camera / Video setting of your UC conference application.
Troubleshooting 103
Microphone is muted
Microphone volume is low / sounds soft
Microphone is muted · Ensure that the USB upstream cable
in the Windows
is connected between the monitor
Device Manager
and the computer or notebook.
· Reconnect the USB upstream cable to the computer or notebook.
· Ensure that the microphone is enabled / unmuted on the monitor. If the microphone mute LED is lighting up in static red (indicates microphone muted), press the microphone button to unmute the microphone.
· Ensure that the monitor’s microphone is selected and enabled / unmuted on the setting in the UC application.
Microphone volume · Ensure that the Mute button’s LED is
is low / sounds soft dark (Indicates microphone
to the other
unmuted).
participant when in · Adjust the distance between the user
audio / video call
and the microphone. The user should
avoid sitting too far away from the
microphone. The most optimum
distance between the user and the
microphone is 70 cm.
· Ensure that the monitor’s microphone is selected and enabled / unmuted on the setting in the UC application.
· Increase the microphone volume in the Sound setting interface at the PC side / in the UC application.
104 Troubleshooting
Front buttons do not work
No response on the · Ensure that the USB upstream cable
UC application when is connected from the PC to the
pressing the buttons monitor.
located on the front · For some UC platforms /
bezel
applications, the Mute function works
by pressing the Mute button, but the
Mute Icon on the UC platform is not
sync (Icon shows unmute). For more
information, see Unified
Communications (UC) Platform
Compatibility List.
Webcam image Webcam image
· Adjust the environment lighting
looks over-exposed shows over-exposed condition. Ensure the monitor is setup
background
at a well lighted environment,
preferably under ceiling lights. The
user should avoid a dim / dark
background. The user should avoid
directly facing a window with bright
sunlight.
Webcam image Webcam image
Adjust the environment lighting
looks grainy / dark appears grainy / dark condition. Ensure the monitor is setup at
a well lighted environment, preferably
under ceiling lights. The user should
avoid a dim environment.
Webcam image looks blurry
Webcam image
· Peel off the transparent protective
appears blurry / not film which originally sticked on the
clear
front of the webcam.
· If the protective film is already peeled off, use a clean and slightly damp cloth to wipe the surface of the front webcam.
· Adjust the distance between the user and the camera. The user should avoid sitting too far away from the camera. The most optimum distance between the user and the camera is 70 cm.
Troubleshooting 105
Time lag between video and audio when playing XBOX
When playing XBOX, · The monitor codec IC initialization
the show out time
time requires approximately 3 ~ 5
between video and seconds. This is normal behavior.
audio has 3 ~ 5
· Wait for 3 ~ 5 seconds after turning
second difference
On monitor power or plugging-in the
while turning On
HDMI cable before playing video on
monitor power or
XBOX.
unplugging/plugging
HDMI cable.
Volume value or speaker status is not updated in OSD
When increasing / · Switch audio device configuration of
decreasing OSD
Windows to Echo Cancelling
volume value or
Speakerphone (C2423H/C2723H).
mute / unmute
See Setting Up the Monitor Speaker
speaker, the adjusted as Default Setting.
value is not updated · Clear all grayed-out device in your
in OSD and front
computer’s Device Manager.
panel button.
The Mute button is not working
Press on the Mute button does not mute and unmute microphone when using Microsoft Teams
· Ensure that the USB upstream cable is connected from the PC to the monitor.
· Ensure that the Teams account is provisioned / setup as Teams Only’ mode. The tenant administrator should enable the account toTeams Only’ mode.
Webcam no image Webcam no image when using Skype for Business (SfB)
Select `DELL Monitor RGB Webcam’ as the camera in Skype Video Device setting.
Webcam being occupied
Webcam being
Avoid running multiple conference
occupied and cannot softwares at the same time. While you
be used
are using `conference software A’, close
the other `conference software B’.
106 Troubleshooting
Dell Monitor Text to Speech User Interface ModuleTS23 is not detected
There is no audible feedback stating “CVAA Connected” when TS23 is connected to the monitor
· Ensure that the monitor supports Menu Voice function and is applicable to
TS23.
· Check that your monitor is turned On.
· Ensure that TS23 is correctly connected to the USB port marked CVAA located
at the back of the monitor.
· Reconnect TS23 to the USB port marked CVAA located at the back of the monitor.
· Turn Off the monitor, unplug the monitor power cord, replug it, and then turn On the monitor.
Menu Voice Function is not working
Dell Monitor Text to · Ensure that TS23 is correctly
Speech User
connected to the USB port marked
Interface Module-
CVAA located at the back of the
TS23 can not
monitor.
broadcast voice when selecting onscreen text menus and commands, which are displayed by the On-Screen
· Ensure that Menu Voice function is set to ON.
· Turn Off the monitor, unplug the monitor power cord, replug it, and then
turn On the monitor.
Menu function
Troubleshooting 107
Universal Serial Bus (USB) Specific Problems
Common Symptoms
What You Experience
Possible Solutions
USB interface is not working
USB peripherals are not working
· Check that your monitor is turned On.
· Reconnect the upstream cable to your computer.
· Reconnect the USB peripherals (downstream connector).
· Switch Off and then turn On the monitor again.
· Reboot the computer.
· Some USB devices like external portable HDD require higher electric current; connect the device directly to the computer system.
SuperSpeed USB 5 SuperSpeed USB 5 · Check that your computer is
Gbps (USB 3.2 Gbps (USB 3.2
SuperSpeed USB 5 Gbps (USB 3.2
Gen1) interface is Gen1) peripherals Gen1)-capable.
slow
working slowly or · Some computers have USB 3.2, USB
not working at all 2.0 and USB 1.1 ports. Ensure that the
correct USB port is used.
· Reconnect the upstream cable to your computer.
· Reconnect the USB peripherals (downstream connector).
· Reboot the computer.
Wireless USB peripherals stop working when a USB 3.2 device is plugged in
Wireless USB
· Increase the distance between the
peripherals
USB 3.2 peripherals and the wireless
responding slowly USB receiver.
or only working as · Position your wireless USB receiver as
the distance
close as possible to the wireless USB
between itself and peripherals.
its receiver decreases
· Use a USB-extender cable to position the wireless USB receiver as far away
as possible from the USB 3.2 port.
108 Troubleshooting
Appendix
FCC Notices (U.S. only) and Other Regulatory Information
For FCC notices and other regulatory information, see the regulatory
compliance website located at www.dell.com/regulatory_compliance.
Contact Dell
For customers in the United States, call 800-WWW-DELL
(800-999-3355). NOTE: If you do not
have an active Internet connection, you can find contact information on your
purchase invoice, packing slip, bill, or Dell product catalog.
Dell provides several online and telephone-based support and service options.
Availability varies by country and product, and some services may not be
available in your area.
· Online technical assistance — www.dell.com/support/monitors · Contacting
Dell — www.dell.com/contactdell
EU Product Database for Energy Label and Product Information Sheet
C2423H: https://eprel.ec.europa.eu/qr/854715 C2723H:
https://eprel.ec.europa.eu/qr/1006737
Appendix 109
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