Table of Contents
- Safety instructions
- About your monitor
- Setting up the monitor
- Operating your monitor
- Troubleshooting
- Regulatory information
DELL S3423DWC User Manual
Displayed below is the user manual for S3423DWC by DELL which is a product in the Computer Monitors category. This manual has pages.
Related Manuals
Monitor Model: S3423DWC
Regulatory Model: S3423DWCc
Dell S3423DWC
User’s Guide
2 │
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. Other trademarks may be trademarks of their respective
owners.
2022 – 03
Rev. A00
│ 3
Contents
Safety instructions.......................... 6
About your monitor ..........................7
Package contents . . . . . . . . . . . . . . . . . . . . . . 7
Product features . . . . . . . . . . . . . . . . . . . . . . .9
Identifying parts and controls . . . . . . . . . . . . . . . 11
Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Monitor specifications . . . . . . . . . . . . . . . . . . . 15
Resolution specifications . . . . . . . . . . . . . . . . . . . . . . 17
Supported video modes . . . . . . . . . . . . . . . . . . . . . . . 17
Preset display modes . . . . . . . . . . . . . . . . . . . . . . . . 18
Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . 19
Physical characteristics. . . . . . . . . . . . . . . . . . . . . . . 20
Environmental characteristics . . . . . . . . . . . . . . . . . . . 21
Plug-and-Play capability. . . . . . . . . . . . . . . . . . 22
LCD monitor quality and pixel policy . . . . . . . . . . . 22
Ergonomics. . . . . . . . . . . . . . . . . . . . . . . . . 22
Handling and moving your display . . . . . . . . . . . . . 24
Maintenance guidelines . . . . . . . . . . . . . . . . . . 25
Cleaning your monitor. . . . . . . . . . . . . . . . . . . . . . . .25
4 │
Setting up the monitor .......................27
Attaching the stand . . . . . . . . . . . . . . . . . . . . 27
Connecting your monitor . . . . . . . . . . . . . . . . . 28
Connecting the USB-C and USB 3.0 cable . . . . . . . . . . . . . 28
Organizing cables . . . . . . . . . . . . . . . . . . . . . 29
Securing your monitor using Kensington lock (optional) 29
Removing the stand . . . . . . . . . . . . . . . . . . . . 30
Wall mounting (optional) . . . . . . . . . . . . . . . . . 31
Operating your monitor ..................... 32
Power on the monitor . . . . . . . . . . . . . . . . . . . 32
Using the control buttons . . . . . . . . . . . . . . . . . 32
Control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
OSD controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Using the On-Screen Display (OSD) menu . . . . . . . . 35
Accessing the OSD menu . . . . . . . . . . . . . . . . . . . . . . 35
Menu and Power button lock . . . . . . . . . . . . . . . . . . . . 49
OSD warning messages . . . . . . . . . . . . . . . . . . . . . . . 51
Setting the maximum resolution . . . . . . . . . . . . . 54
Setting the KVM switch. . . . . . . . . . . . . . . . . . . . . . .55
Setting the Auto KVM . . . . . . . . . . . . . . . . . . . . . . . .56
Using the tilt and vertical extension. . . . . . . . . . . . 57
Tilt extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Vertical extension . . . . . . . . . . . . . . . . . . . . . . . . . . 57
│ 5
Troubleshooting ........................... 58
Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Built-in diagnostics . . . . . . . . . . . . . . . . . . . . 59
Common problems . . . . . . . . . . . . . . . . . . . . . 61
Regulatory information ..................... 65
FCC notices (U.S. Only) and other regulatory information 65
EU product database for energy label and product
information sheet . . . . . . . . . . . . . . . . . . . . . 65
Contacting Dell. . . . . . . . . . . . . . . . . . . . . . . 65
6 │ Safety instructions
Safety instructions
Use the following safety guidelines to protect your monitor from potential damage
and to ensure your personal safety. Unless otherwise noted, each procedure
included in this document assumes that you have read the safety information that
shipped with your monitor.
NOTE: Before using the monitor, read the safety information that
is shipped with your monitor and printed on the product. Keep the
documentation at a secure location for future reference.
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.
WARNING: The possible long-term effect of listening to audio at
high volume through the headphones (on monitor that support it) may
cause damage to your hearing ability.
• Place the monitor on a solid surface and handle it carefully. The screen is fragile
and can be damaged if dropped or hit with a sharp object.
• Ensure 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.
• Connect the power cable from the monitor to a wall outlet that is near and
accessible. See Connecting your monitor.
• Do not place and use the monitor on a wet surface or near water.
• 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.
• To avoid electric shock, do not attempt to remove any cover or touch the inside
of the monitor.
• Read these instructions carefully. Keep this document for future reference.
Follow all warnings and instructions marked on product.
• Certain monitors can be wall mounted using the VESA mount that is sold
separately. Ensure to use the correct VESA specifications as mentioned in the
wall mounting section of the User’s Guide.
For information on safety instructions, see the Safety, Environmental, and
Regulatory Information (SERI) document that is shipped with your monitor.
About your monitor │ 7
About your monitor
Package contents
The following table provides the list of components that are shipped with your
monitor. If any component is missing, contact Dell. For more information, see
Contacting Dell.
NOTE: Some items may be optional and may not ship with your monitor.
Some features may not be available in certain countries.
Component image Component description
Monitor
Stand riser
Stand base
Power cable (varies by
countries)
8 │ About your monitor
Component image Component description
Super speed USB 3.2 Gen 2
10 Gbps Type-C to Type-C
upstream cable (C-C cable) (1
meter)
USB 3.0 upstream cable
(enables the USB ports on the
monitor)
• Quick Setup Guide
• Safety, Environmental, and
Regulatory Information
About your monitor │ 9
Product features
The Dell S3423DWC monitor has an active matrix, Thin-Film Transistor (TFT),
Liquid Crystal Display (LCD), anti-static, and LED backlight. The monitor features
include:
• 86.42 cm (34.0 in.) viewable area display (measured diagonally).
• 3440 x 1440 resolution, with full-screen support for lower resolutions.
• Compatible with (AMD FreeSync), high refresh rates, and a rapid response time
of 4 ms.
• Supports 48 Hz to 100 Hz (HDMI) and 48 Hz to 100 Hz (USB-C Alternate mode
with DisplayPort 1.4) in Freesync Mode.
• Built-in Speaker (5 W) x 2.
• Color gamut of 99% sRGB.
• Supports both Picture by Picture (PBP) / Picture in Picture (PIP) Select Mode.
• Digital connectivity with USB-C and HDMI.
• Single USB-C to supply power (PD 65W) to a compatible notebook while
receiving video and data signal.
• Equipped with 1 USB-C upstream port, 1 Type B upstream port, 1 super speed
USB 5 Gbps (USB 3.2 Gen 1) Type-A downstream port, and 1 super speed USB 5
Gbps (USB 3.2 Gen 1 with BC1.2) Type-A downstream port.
• The built-in KVM switch allows you to control up to 2 computers from a single
set of keyboard and mouse connected to the monitor.
• Supports Auto KVM for multiple input setup.
• Enables user to switch USB KVM function in PBP mode.
• Plug-and-play capability if supported by your computer.
• On-Screen Display (OSD) adjustments for ease of setup and screen optimization.
• Removable stand and Video Electronics Standards Association (VESA) 100 mm
mounting holes for flexible mounting solutions.
• Tilt and height adjustment capabilities.
• Security-lock slot.
• ≤0.3 W in the Standby Mode
• Dell Display Manager Software included.
• Uses Low Blue Light panel and is compliant with TUV Rheinland (Hardware
Solution) at factory reset/default setting model (Preset mode: Standard).
• Optimize eye comfort with a flicker-free screen.
10 │ About your monitor
WARNING: The possible long-term effects of blue light emission from
the monitor may cause damage to the eyes, which includes but is not
limited to eye fatigue and digital eye strain. ComfortView Plus feature is
designed to reduce the amount of blue light emitted from the monitor to
optimize eye comfort.
About your monitor │ 11
Identifying parts and controls
Front view
21
Control buttons
Label Description Use
1 Function buttons To adjust items in the OSD menu.
(For more information, see Using the
control buttons.)
2 Power On/Off button To turn the monitor on or off.
Solid white light indicates that the
monitor is turned on and functioning
normally.
Blinking white light indicates that the
monitor is in Standby Mode.
12 │ About your monitor
Back view
3
5
4
2
1
SVC Tag:
1234567
Express Service
Code:
123 456 789 0
S/N: CN-0M2TMK
-TV100-04F-001V
-A00
Date of Mfg/生产日期/生產日期: April. 2020
Q40G034N-700-02A
Flat Panel Monitor /液晶显示器
型号: S3421DW
Input Rang /输入电源:
100-240V 50/60Hz,1.6A
Made in China /中国制造
DELL S3421DW
Q40G034N-700-01A
DELL S3423DWC
Flat Panel Monitor /Monitor Plano Panel /Moniteur écran plat /液晶顯示器
Model No. /Modelo /N°de modelo /型號: S3423DWCc
Input Rang /Entrade /Daya Tegangan:100-240V 50/60Hz,1.6A
輸入電源:交流電壓100-240伏特,1.6安培,50/60赫茲
Consumo de energía en operación: XXX Wh
Удельная мощность рабочего режима - XXX Вт/см²
Потребляемая мощность изделием в режиме ожидания - XXX Вт
Потребляемая мощность изделием в выключенном режиме - XXX Вт
Apparatet må lkoples jordet skkontakt.
Apparaten skall anslutas ll jordat uag.
Laite on liiteävä suojakoskemilla varusteuun pistorasiaan.
Apparatets skprop skal lslues en skkontakt med jord,
som giver forbindelse l skproppens jord.
The equipment must be connected to an earthed mains socket-outlet.
L'appareil doit être branché sur une prise de courant munie d'une mise à la terre.
сделанный в Китай /Fabriqué en Chine /中國製造 警語: 使用過度恐傷害視力。
www.dell.com/regulatory_compliance Raheen Business Park Limerick Ireland (for EU Only)
CAN ICES-3 (B)/NMB-3(B)
This device complies with part 15 of the FCC Rules. Operaon is subject to the following two condions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operaon.
XXXXXXX -XXXXX
R-R-TPF-S3421DWc
제조자/신청인:TPV Electronics (Fujian) Co., Ltd.
080-200-3800
R33037
RoHS
IS 13252 (Part 1)/
IEC 60950-1
R-41018660
www.bis.gov.in
For UK only: Cain Road, Bracknell, RG12 1LF
20
XXXXX
デ
入力:100 V, 1.6 A, 50/60 Hz
XXXXX-XX
Made in China
Back View with monitor stand
Label Description Use
1 Cable management slot Used to organize cables by routing
them through the slot.
2 VESA mounting holes (100 mm
x 100 mm), located behind the
VESA cover
Used for wall-mounting the monitor
through a VESA-compatible wall-
mount kit.
3 Regulatory information label Lists the regulatory approvals.
4 Stand release button Releases the stand from the monitor.
5 Regulatory label (including
Barcode serial number and
Service Tag label)
Lists the regulatory approvals. Refer
to this label if you need to contact
Dell for technical support.The Service
Tag is a unique alphanumeric identifier
that enables Dell service technicians
to identify the hardware components
in your computer and access warranty
information.
About your monitor │ 13
Side view
Bottom view
68
42 93 107
5
1
Bottom view without monitor stand
Label Description Use
1 Security-lock
slot (based on
Kensington
Security Slot)
Secure your monitor using a security lock (purchased
separately) to prevent unauthorized movement of your
monitor.
2 Power connector Connect the power cable (shipped with your monitor).
3 HDMI 1 2.0 port Connect to your computer using an HDMI cable.
4 Stand lock
feature
Lock the stand to the monitor using a M3 x 6 mm
screw (screw not included).
5 HDMI 2 2.0 port Connect to your computer using an HDMI cable.
14 │ About your monitor
6 USB-C upstream
port
Connect the USB-C cable that came with your monitor
to the computer or mobile device. This port supports
USB Power Delivery, Data, and DisplayPort video
signal. The super speed USB 5 Gbps (USB 3.2 Gen
1) Type-C port offers the fastest transfer rate and
the alternate mode with DP 1.4 supports a maximum
resolution of 3440 x 1440 at 100 Hz, PD 20 V/3.25 A,
15 V/3 A, 9 V/3 A, 5 V/3 A.
NOTE: USB-C is not supported on Windows
versions that were released before Windows
10.
7 Audio line out
port
Connect to an external speaker or a sub-woofer
(purchased separately).*
8 Super speed USB
5 Gbps (USB 3.2
Gen 1) Type-B
upstream port
Connect the USB cable that came with your monitor
to the computer. Once this cable is connected, you
can use the USB connectors on the monitor.
9 Super speed USB
5 Gbps (USB 3.2
Gen 1) Type-A
downstream port
(3)
Connect your USB device.**
NOTE: To use this port, you must connect
the USB-C cable or USB Upstream Cable
(shipped with your monitor) to the USB-C
upstream port or the USB Type-B upstream
port on the monitor and to your computer.
10 Super speed USB
5 Gbps (USB 3.2
Gen 1) Type-A
downstream
port with Power
Charging
Connect your USB device** or charge your device
NOTE: To use this port, you must connect
the USB-C cable or USB Upstream Cable
(shipped with your monitor) to the USB-C
upstream port or the USB Type-B upstream
port on the monitor and to your computer.
*Audio line out port does not support headphones.
**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).
About your monitor │ 15
Monitor specifications
Model S3423DWC
Screen type Active matrix-TFT LCD
Panel type Vertical Alignment
Viewable image
Diagonal
Horizontal, Active Area
Vertical, Active Area
Area
864.2 mm (34.0 in.)
797.2 mm (31.19 in.)
333.7 mm (13.14 in.)
266048.26 mm2 (412.38 in.2)
Native resolution and
refresh rate
3440 x 1440 at 100 Hz (HDMI 1 and HDMI 2)
3440 x 1440 at 100 Hz (USB-C)
Pixel pitch 0.2318 mm x 0.2318 mm
Pixel per inch (PPI) 109
Viewing angle
Horizontal
Vertical
178° (typical)
178° (typical)
Luminance output 350 cd/m² (typical)
Contrast ratio 3000 to 1 (typical)
Faceplate coating Anti-glare with 3H hardness
Backlight LED edgelight system
Response time (Gray to
Gray)
4 ms (Extreme mode)
5 ms (Fast mode)
8 ms (Normal mode)
Color depth 16.7 million colors
Color gamut sRGB CIE 1931 (99%)
16 │ About your monitor
Connectivity 2 x HDMI 2.0 with HDCP 2.2
1 x USB Type -C upstream (Alternate mode with
DisplayPort 1.4, Power Delivery PD up to 65 W)*
1 x super speed USB 5 Gbps (USB 3.2 Gen 1) Type-B
upstream port
1 x super speed USB 5 Gbps (USB 3.2 Gen 1)
downstream port
1 x super speed USB 5 Gbps (USB 3.2 Gen 1) with BC1.2
charging capability at 2 A (maximum)
1 x Audio line out
Bezel width (edge of monitor to active area)
Top
Left/Right
Bottom
8.64 mm
8.65 mm
22.14 mm
Adjustability
Height adjustable stand
Tilt
Swivel
Slant Adjust
100 mm
-5° to 21°
N/A
-4° to 4°
Dell display manager
compatibility
Easy Arrange and other key features
Security Security-lock slot (cable lock optional purchase)
*USB-C (Alternate mode with DisplayPort 1.4): HBR3/DisplayPort 1.4/DP audio is
supported.
About your monitor │ 17
Resolution specifications
Model S3423DWC
Horizontal scan range 30 kHz to 160 kHz
Vertical scan range 48 Hz to 100 Hz (HDMI)
48 Hz to 100 Hz (USB-C)
Maximum preset
resolution
3440 x 1440 at 100 Hz (USB-C)
3440 x 1440 at 100 Hz (HDMI)
Supported video modes
Model S3423DWC
Video display capabilities
(HDMI/USB-C)
480p, 480i(HDMI), 576p, 720p, 1080p, 576i(HDMI),
1080i(HDMI)
18 │ About your monitor
Preset display modes
Display Mode
Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel Clock
(MHz)
Sync Polarity
(Horizontal /
Vertical)
VESA, 640 x 480 31.47 59.94 25.18 -/-
VESA,640 x 480 37.50 75 31.50 -/-
IBM, 720 x 400 31.47 70.08 28.32 -/+
VESA,800 x 600 37.88 60.32 40 +/+
VESA,800 x 600 46.88 75 49.50 +/+
VESA,1024 x 768 48.36 60 65 -/-
VESA,1024 x 768 60.02 75.03 78.75 +/+
VESA,1152 x 864 67.50 75 108 +/+
VESA,1280 x 1024 63.98 60.02 108 +/+
VESA,1280 x 1024 79.98 75.02 135 +/+
VESA,1600 x 900 60 60 108 +/+
VESA,1600 x 1200 75 60 162 +/+
VESA,1680 x 1050 65.29 59.95 146.25 -/+
VESA,1920 x 1080 67.50 60 148.50 +/+
VESA,1920 x 1080 113.22 100 235.50 +/-
VESA,1920 x 1200 74.04 59.95 154 +/-
VESA,2560 x 1080 66.66 60 185.58 +/-
VESA,2560 x 1080 113.24 100 308 +/-
VESA,3440 x 1440 49.99 73.68 265.25 +/-
VESA,3440 x 1440 88.82 59.97 319.75 +/-
VESA,3440 x 1440 150.97 99.98 543.50 +/-
NOTE: This monitor supports AMD FreeSync.
About your monitor │ 19
Electrical specifications
Model S3423DWC
Video input signals HDMI 2.0 (HDCP), 600 mV for each differential line,
100 ohm input impedance per differential pair
USB-C 1.4, 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 / 2.0A
(max.)
Inrush current 120 V: 30 A (max.) at 0°C (cold start)
240 V: 60 A (max.) at 0°C (cold start)
Power Consumption 0.3 W (Off Mode)1
0.4 W (Standby Mode)1
31 W (On Mode)1
160 W (max)2
32 W (Pon)3
100.96 kWh (TEC)3
1 As dened 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 measured with reference to Energy Star
test method.
TEC: Total energy consumption in kWh measured with reference to Energy Star
test method.
This document is informational only and reects laboratory performance. Your
product may perform dierently, 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.
20 │ About your monitor
Physical characteristics
Model S3423DWC
Signal cable type • Digital: USB-C, 24 pins
• Universal Serial Bus: USB, 9 pins
Dimensions (with stand)
Height (extended) 489.36 mm (19.27 in.)
Height (compressed) 389.36 mm (15.33 in.)
Width 808.16 mm (31.82 in.)
Depth 217.05 mm (8.55 in.)
Dimensions (without stand)
Height 364.50 mm (14.35 in.)
Width 808.16 mm (31.82 in.)
Depth 64.03 mm (2.52 in.)
Stand dimensions
Height 382.20 mm (15.05 in.)
Width 302 mm (11.89 in.)
Depth 217.05 mm (8.55 in.)
Weight
Weight with packaging 15.21 kg (33.53 lb)
Weight with stand assembly
and cables
10.53 kg (23.21 lb)
Weight without stand
assembly (no cables)
6.65 kg (14.66 lb)
Weight of stand assembly 3.09 kg (6.81 lb)
Front-frame gloss Black frame 2-4 gloss units
About your monitor │ 21
Environmental characteristics
Model S3423DWC
Compliant Standards
• RoHS-compliant
• BFR/PVC reduce monitor (The circuit boards are made from BFR/PVC-free
laminates)
• Arsenic-free glass and Mercury-free for the panel only
• Energy Gauge shows the energy level being consumed by the monitor in real
time.
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 10% to 90% (non-condensing)
• Shipping 10% to 90% (non-condensing)
Altitude
Operating
(maximum)
5,000 m (16,400 ft)
Non-operating
(maximum)
12,192 m (40,000 ft)
Thermal
dissipation
• 109.22 BTU/hour (typical)
• 546.07 BTU/hour (maximum)
22 │ About your monitor
Plug-and-Play capability
You can install the monitor in any Plug-and-Play compatible computer. The monitor
automatically provides the computer with its Extended Display Identification Data
(EDID) using Display Data Channel (DDC) protocols so the system can configure
itself and optimize the monitor settings. Most monitor installations are automatic.
You can select different settings, if necessary. For more information about chang-
ing the monitor settings, see Operating your 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 Dell Support site at www.dell.com/pixelguidelines.
Ergonomics
CAUTION: Improper or prolonged usage of keyboard may result in in-
jury.
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, or shoulder pain from using
the monitor for long period, we recommend you to:
1. Set the distance of the screen between 20 in. to 28 in. (50 cm - 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.
About your monitor │ 23
• Ensure that the monitor screen is at eye level or slightly lower when you are
sitting in front of the 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, ensure 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.
oor
feet at on the
and at
wrists relaxed
below eye level
keyboard
of the user
monitor screen at or
monitor and
positioned
directly in front
24 │ About your monitor
Handling and moving your display
To ensure that the monitor is handled safely when lifting or moving it, observe the
following guidelines:
• 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 that the screen is facing away from
you. 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.
• When lifting or moving the monitor, do not turn the monitor upside down while
holding the stand base or stand riser. It may result in accidental damage to the
monitor or cause personal injury.
About your monitor │ 25
Maintenance guidelines
Cleaning your monitor
WARNING: Using improper methods when cleaning the monitor can
result in a physical damage to the screen or the body of your Dell
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, clean-
ing, 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 or other chemicals such as benzene,
thinner, ammonia, abrasive cleaners, or compressed air.
CAUTION: Using chemicals for cleaning may cause changes in the ap-
pearance of the monitor, such as color fading, milky film on the moni-
tor, deformation, uneven dark shade, and peeling of screen area.
WARNING: Do not spray the cleaning solution or even water directly
on the surface of the monitor. Doing so will allow liquids to accumulate
at the bottom of the display panel and corrode the electronics result-
ing in permanent damage. Instead, apply the cleaning solution or water
to a soft cloth and then clean the monitor.
26 │ About your monitor
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 dark-colored monitor may get scratched
and show white scuff marks more than a light-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.
Setting up the monitor │ 27
Setting up the monitor
Attaching the stand
NOTE: The stand is not installed at the factory when shipped.
NOTE: The following instructions are applicable only for the stand that
was shipped with your monitor. If you are attaching a stand that you
purchased from any other source, follow the setup instructions that
were included with the stand.
To attach the monitor stand:
1. Follow the instructions on the flaps of carton to remove the stand from the
top cushion that secures it.
2. Connect the stand base to the stand riser.
3. Open the screw handle on the stand base and tighten the screw to secure the
stand riser to the stand base.
4. Close the screw handle.
3
2
1
4
5. Slide the tabs on the stand assembly into the slots on the monitor and press
the stand assembly down to snap it into place.
5
6. Place the monitor upright.
28 │ Setting up the monitor
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 if non-Dell cables are used.
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 images are for the purpose of illustration only. The
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 HDMI or USB-C cable (optional purchase) from your monitor to
the computer.
3. Connect the USB upstream cable (shipped with your monitor) to an
appropriate USB 3.0 port on your computer. (See Bottom view for details.)
4. Connect the USB 3.0 peripherals to the downstream USB 3.0 ports on the
monitor.
Connecting the USB-C and USB 3.0 cable
USB USB
USB-C
USB-C
5. Connect the power cables from your computer and monitor into a wall outlet.
Setting up the monitor │ 29
Organizing cables
Use the cable-management slot to route the cables connected to your monitor.
Securing your monitor using Kensington lock (optional)
The security-lock slot is located at the bottom of the monitor. (See Security-lock
slot). Secure your monitor to a table using the Kensington security-lock.
For more information on using the Kensington lock (sold separately), see the docu-
mentation that is shipped with the lock.
NOTE: The image is for the purpose of illustration only. The appear-
ance of the lock may vary.
30 │ Setting up the monitor
Removing the stand
NOTE: To prevent scratches on the LCD screen when removing the
stand, ensure that the monitor is placed on a soft surface and handle it
carefully.
NOTE: The following steps are specifically for removing the stand that
is shipped with your monitor. If you are removing a stand that you pur-
chased from any other source, follow the setup instructions that are
included with the stand.
To remove the stand:
1. Place the monitor on a soft cloth or cushion at the edge of the desk.
2. Press and hold the stand release button, and then lift the stand off the
monitor.
1
2
Setting up the monitor │ 31
Wall mounting (optional)
(Screw dimension: M4 x 10 mm).
See the documentation that is shipped with the VESA-compatible wall-mounting
kit.
1. Lay the monitor on a soft cloth or cushion at the edge of the desk.
2. Remove the stand. See Removing the stand for details.
3. Remove the four screws that secure the panel to the monitor.
4. Attach the mounting bracket from the wall mounting kit to the monitor.
5. To mount the monitor on the wall, see the documentation that is shipped with
the wall-mounting kit.
NOTE: For use only with UL or CSA or GS-listed wall mount bracket
with minimum weight/load-bearing capacity of 26.6 kg.
32 │ Operating your monitor
Operating your monitor
Power on the monitor
Press the button to turn on the monitor.
Using the control buttons
Use the control buttons at the bottom edge of the monitor to adjust the image
being displayed.
1 52 3 4
Operating your monitor │ 33
Control buttons
The following table describes the control buttons:
Control Buttons Description
1
Shortcut key/Preset
Modes
Use this button for choose from a list of preset
modes.
2
Shortcut key/Input
Source
Use the button to adjust the volume. Minimum is ‘0’
(-). Maximum is ‘100’ (+).
3
Menu
Use the Menu button at launch your on-screen
display (OSD) and select the OSD menu. See
Accessing the OSD menu.
4
Exit
Use the button to go back to the main menu or exit
the OSD main menu.
5
Power On/Off button
(with LED indicator)
Use the power button to turn the monitor on or off.
Solid white light indicates the monitor is turned on.
Blinking white light indicates it is in Standby mode.
34 │ Operating your monitor
OSD controls
Use the buttons on the bottom of the monitor to adjust the image settings.
1234
Control Buttons Description
1
Up
Use the Up button to increase values or move up in
a menu.
2
Down
Use the Down button to decrease values or move
down in a menu.
3
OK
Use the OK button to confirm your selection in a
menu.
4
Back
Use the Back button to go back to the previous
menu.
Operating your monitor │ 35
Using the On-Screen Display (OSD) menu
Accessing the OSD menu
NOTE: Any changes you make are automatically saved when you move
to another menu, exit the OSD menu, or wait for the OSD menu to
automatically close.
1. Press the button to display the OSD main menu.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
75%
75%
2. Press the and buttons to move between the setting options. As you move
from one icon to another, the option is highlighted.
3. Press the or or button once to activate the highlighted option.
4. Press the and buttons to select the desired parameter.
5. Press the button and then use the and buttons, according to the
indicators on the menu, to make your changes.
6. Select the button to return to previous menu or the button to accept or
return to previous menu.
36 │ Operating your monitor
Icon Menu and
Submenus
Description
Brightness/
Contrast
Uses this menu to adjust the brightness and contrast.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
75%
75%
Brightness Adjusts the brightness of the backlight.
Presses the button to increase the brightness and
presses the button to decrease the brightness (min.
0/ max. 100).
Contrast Adjusts the brightness first, and then adjusts the con-
trast only if further adjustment is necessary.
Presses the button to increase the contrast and
presses the button to decrease the contrast (min.
0/max. 100).
The Contrast function adjusts the degree of difference
between darkness and lightness on the monitor screen.
Operating your monitor │ 37
Icon Menu and
Submenus
Description
Input Source Uses the input source menu to select between the
different video signals that may be connected to your
monitor.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
HDMI 1
Auto Select On
Prompt for Multiple Inputs
HDMI 2
Auto Select for USB-C
USB-C
Reset Input Source
USB-C Selects the USB-C input when you are using the USB-
C connector. Presses the button to select the USB-
C input source.
HDMI 1 Selects HDMI 1 input when you are using the HDMI 1
connector. Presses the button to select the HDMI 1
input source.
HDMI 2 Selects HDMI 2 input when you are using the HDMI 2
connector. Presses the button to select the HDMI 2
input source.
Auto Select Selects Auto Select to scan for available input signals.
Auto Select
for USB-C
Selects Auto Select for USB-C to view the following
options:
∞Prompt for Multiple Inputs: Always displays the
Switch to USB-C Video Input message for you to
choose whether to switch or not.
∞Yes: Always switches to USB-C video input
(without asking) when the USB-C cable is connected.
∞No: Never automatically switches to USB-C video
input when the USB-C cable is connected.
NOTE: Auto Select for USB-C is available only
when Auto Select is on
Reset Input
Source
Selects this option to restore default Input Source.
38 │ Operating your monitor
Icon Menu and
Submenus
Description
Color Changes the color setting mode.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Preset Modes
Input Color Format
Reset Color
RGB
Standard
Preset
Modes
When you select Preset Modes, you can choose
Standard, Movie, FPS, RTS, RPG, Warm, Cool, or
Custom color from the list.
∞Standard: Loads the monitor's default color settings.
This is the default preset mode.
∞Movie: Loads color settings ideal for movies.
∞FPS: Loads color settings ideal for First-person
Shooter games.
∞RTS: Loads color settings ideal for Real-time Strat-
egy games.
∞RPG: Loads color settings ideal for Role-playing
games.
∞Warm: Increases the color temperature. The screen
appears warmer with a red/yellow tint.
∞Cool: Decreases the color temperature. The screen
appears cooler with a blue tint.
∞Custom Color: Allows you to manually adjust the
color settings.
Operating your monitor │ 39
Icon Menu and
Submenus
Description
Preset
Modes Presses the and buttons to adjust the three
colors (R, G, B) values and create your own preset
color mode.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Preset Modes
Input Color Format
Reset Color
Standard
Movie
FPS
RTS
RPG
Warm
Cool
Custom Color
Input Color
Format
Allows you to set the video input mode to:
∞RGB: Selects this option if your monitor is connected
to a computer or a media player that supports RGB
output.
∞YCbCr: Selects this option if your media player sup-
ports only YCbCr output.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Preset Modes
Input Color Format
YCbCr
RGB
Hue
Saturation
Reset Color
40 │ Operating your monitor
Icon Menu and
Submenus
Description
Hue Uses this feature to adjust the flesh tone color in the
video image. Press the or button to adjust the
hue from 0 to 100.
Presses the button to increase the green shade of
the video image.
Presses the button to increase the purple shade of
the video image.
NOTE: Hue adjustment is available only when
you select Movie and Game mode.
Saturation Adjusts the color saturation of the video image. Uses
the or button to adjust the saturation from 0 to
100.
Presses the button to increase the monochrome ap-
pearance of the video image.
Presses the button to increase the colorful appear-
ance of the video image.
NOTE: Saturation adjustment is available only
when you select Movie and Game mode.
Reset Color Resets your monitor's color settings to the factory
settings.
Operating your monitor │ 41
Icon Menu and
Submenus
Description
Display Uses Display to adjust image.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Aspect Ratio
Sharpness
Response Time
USB-C Prioritization
50
21:9
Normal
Reset Display
High Data Speed
Aspect Ratio Adjusts the image ratio to 21:9 or Auto Resize or 4:3
or 1:1
Sharpness Makes the image look sharper or softer. Presses the
or button to adjust the sharpness from 0 to 100.
Response
Time
Select the response time: Normal, Fast, or Extreme.
USB-C
Prioritization
Allows you to specify the priority to transfer the data
with high resolution (High Resolution) or high speed
(High Data Speed) when using the USB-C port/
USB-C.
A
s
p
ect Ratio
S
h
a
r
p
n
e
s
s
R
e
s
p
o
n
s
e
T
i
m
e
USB-C Prioritization
Display
Brightness/Contrast
Dell 34 Monitor
High Resolution
InputSource
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
e
s
e
t
D
i
s
p
l
a
y
High Data Speed
PIP/PBP
USB Selection
Reset Dis-
play
Selects this option to restore default display settings.
42 │ Operating your monitor
Icon Menu and
Submenus
Description
PIP/PBP Allows you to watch more images at the same time.
Display
Brightness / Contrast
Dell 34 Monitor
50% - 50%
75% - 25%
25% - 75%
67% - 33%
33% - 67%
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
O
PIP/PBP
USB Selection
PIP/PBP Mode
PIP/PBP
Mode
Adjusts the PIP/PBP Mode. You can adjust
this feature by selecting Off, 50%-50%, 75%-
25%, 25%-75%, 67%-33%, 33%-67%,
PIP(Small),PIP(Large).
NOTE: FreeSync is turned off when PIP/PBP
is enabled.
PIP/PBP
(Sub)
Selects between USB-C, HDMI 1 or HDMI 2 video
signal that may be connected to your monitor for the
PIP/PBP sub-window.
Main
Window
Sub-Window
USB-C HDMI 1 HDMI 2
USB-C
HDMI 1
HDMI 2
USB Select
Switch
Selects to switch between the USB sources in PIP/
PBP Mode.
NOTE: This option is available only when PIP/
PBP Mode is on.
Audio Allows you to set the Audio Main or Sub.
Video Swap Selects to swap videos between main window and sub-
window in PIP/PBP Mode.
Contrast
(Sub)
Adjusts the contrast level of the picture in PIP/PBP
Mode.
NOTE: Only applicable when the user turns on
PIP/PBP.
Operating your monitor │ 43
Icon Menu and
Submenus
Description
USB
Selection
Allows you to assign the USB upstream port for the
input signals (HDMI 1 and HDMI 2), so that the moni-
tor’s USB downstream port (for example, keyboard and
mouse) can be used by the current input signals when
you connect a computer to either one of the upstream
ports. See also Setting the KVM switch for details.
When you use only one upstream port, the connected
upstream port is active.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
USB-B
USB-C
PIP/PBP
USB Selection
HDMI 1
HDMI 2
NOTE: To prevent data damage or loss,
before changing USB upstream ports, make
sure that NO USB storage devices are in use
by the computer connected to the monitor’s
USB downstream port.
Audio Change the audio settings.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
MenuMenu
Others
Others
PersonalizePersonalize
AudioAudio
PIP/PBP
USB Selection
Volume
Speaker
Reset Audio
Enable
50
Volume Presses the buttons to adjust the volume. Minimum is
‘0’ (-). Maximum is ‘100’ (+).
Speaker Selects this option to activate the speaker.
Reset Audio Selects this option to restore default display settings.
44 │ Operating your monitor
Icon Menu and
Submenus
Description
Menu Selects 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.
Display
Dell 34 Monitor
Input Source
Color
Audio
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Menu
Brightness / Contrast Language
Transparency 20
Timer
Lock
English
20 s
Reset Menu
Disable
Language Set the language option for the OSD display: English,
Spanish, French, German, Brazilian Portuguese,
Russian, Simplified Chinese, or Japanese.
Transpar-
ency
Presses the or button to change the menu
transparency (0 to 100).
Timer OSD hold time: sets the length of time the OSD will
remain active after the last time you pressed a button.
Presses the or button to adjust the slider in 1
second increments, from 5 to 60 seconds.
Lock Controls user access to adjustments. User can select
one of the following: Menu Buttons, Power Button,
Menu + Power Buttons, Disable.
Reset Menu Resets all OSD settings to the factory preset values.
Operating your monitor │ 45
Icon Menu and
Submenus
Description
Personalize Selects this option to adjust the settings of the person-
alization.
Display
Dell 34 Monitor
Input Source
Color
Audio
Others
Others
Audio
PIP/PBP
USB Selection
Menu
Brightness / Contrast
Personalize
Shorout Key 1
Shorout Key 2
Power Button LED
Preset Modes
Volume
On in On Mode
USB-C Charging
Other USB Charging
Reset Personalization
O in O Mode
O in Standby Mode
Shortcut
Key 1
Selects one of the following: Preset Modes, Bright-
ness/Contrast, Input Source, Aspect Ratio, Vol-
ume, PIP/PBP Mode, USB Select Switch, Video
Swap to set the Shortcut key 1.
Display
Dell 34 Monitor
Input Source
Color
Audio
Others
Others
Audio
PIP/PBP
USB Selection
Menu
Brightness / Contrast
Personalize
Shorout Key 1
Aspect Ratio
Power Button LED
Input Source
Shorout Key 2
Brightness / Contrast
Volume
Preset Modes
PIP/PBP Mode
USB Select Switch
Video Swap
USB-C Charging
Other USB Charging
Reset Personalization
Shortcut
Key 2
Selects one of the following: Preset Modes, Bright-
ness/Contrast, Input Source, Aspect Ratio, Vol-
ume, PIP/PBP Mode, USB Select Switch, Video
Swap to set the Shortcut key 2.
Display
Dell 34 Monitor
Input Source
Color
Audio
Others
Others
Audio
PIP/PBP
USB Selection
Menu
Brightness / Contrast
Personalize
Aspect Ratio
USB Charging
Power Button LED
Input Source
Shortout Key 2 Brightness / Contrast
USB
Preset Modes
Reset Personalization
Shortout Key 1
Volume
PIP/PBP Mode
USB Select Switch
Video Swap
46 │ Operating your monitor
Icon Menu and
Submenus
Description
Power But-
ton LED
Sets the power LED indicator On In On Mode or Off
In On Mode to save energy.
Display
Dell 34 Monitor
Input Source
Color
Audio
Others
Others
Audio
PIP/PBP
USB Selection
Menu
Brightness / Contrast
Personalize
Shorout Key 1
Shorout Key 2
Power Button LED On in On Mode
O in On Mode
USB-C Charging
Other USB Charging
Reset Personalization
USB-C
Charging The default setting is Off in Off Mode . Selecting
On in Off Mode may automatically charge your note-
book or mobile devices through the USB-C cable even
when the monitor is in off mode.
Other USB
Charging
Allows you to enable or disable USB Type-A (Down-
stream Ports) charging function during monitor
standby mode.
Reset Per-
sonalization
Resets all settings under the personalize menu to the
default setting.
Operating your monitor │ 47
Icon Menu and
Submenus
Description
Others Changes the OSD settings, such as the DDC/CI, LCD
conditioning, and so on.
Display
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Others
Brightness / Contrast Display Info
Reset Others
Factory Reset
LCD Conditioning O
DDC/CI On
Service Tag
Self-Diagnostic
Firmware 00X000
899VNH3
Display Info Views the monitor’s current settings.
Dell 34 Monitor
Display
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Others
Brightness / Contrast Display Info
Reset Others
Factory Reset
LCD Conditioning
DDC/CI
Service Tag
Self-Diagnostic
Firmware
Current: 1920x1080, 60Hz 24-bit
Input Source: HDMI 2
PBP Status: O
PIP Status: O
DP Capability: DP 1.4
Link Rate (Current) : -
USB: -
Model: Dell S3423DWC
DDC/CI DDC/CI (display data channel/command interface)
allows your monitor parameters (brightness, color bal-
ance and etc.) to be adjusted using the software on
your computer.
You can disable this feature by selecting Off.
Enables this feature by selecting On for best user ex-
perience and optimum performance of your monitor.
Dell 34 Monitor
Display
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Others
Brightness / Contrast
DDC/CI
O
On
Display Info
Reset Others
Factory Reset
LCD Conditioning
Service Tag
Self-Diagnostic
Firmware
48 │ Operating your monitor
Icon Menu and
Submenus
Description
LCD Condi-
tioning
Helps reduce minor cases of image retention. Depend-
ing on the degree of image retention, the program may
take some time to run. To start LCD conditioning,
select.
Firmware Views the firmware version of the display.
Service Tag Views the service tag number of the display. The
Service Tag is a unique alphanumeric identifier that
allows Dell to identify the product specifications and
access warranty information.
NOTE: The Service Tag is also printed on a
label located at the back of the cover.
Self-
Diagnostic
Allows you to check if your monitor is functioning
properly.
Reset Oth-
ers
Resets all settings under the others setting menu to
the factory preset values.
Factory
Reset
Restores all preset values to the factory default
settings.
NOTE: Your monitor has a built-in feature to automatically calibrate
the brightness to compensate for LED aging.
Operating your monitor │ 49
Menu and Power button lock
Prevents users to access or change OSD menu settings on the display.
By default, the Menu and Power button lock setting is disabled.
1 52 3 4
To access the Lock menu, press and hold the Exit button (button 4) for four
seconds. A Lock menu appears at the bottom right corner of the display.
NOTE: The Lock menu can be accessed using this method when the
Menu and Power buttons are in unlocked state.
Dell 34 Monitor
Select option:
+
To access the Unlock menu, press and hold the Exit button (button 4) for four
seconds. An Unlock menu appears at the bottom-right corner of the display.
NOTE: The Unlock menu can be accessed when the Menu buttons are
in locked state.
Select option:
Dell 34 Monitor
50 │ Operating your monitor
There are three lock options.
Menu Description
1Menu Buttons When Menu Buttons is selected, the OSD menu
settings cannot be changed. All buttons are locked
except Power button.
2Power Button When Power Button is selected, the display cannot
be turned off using the Power button.
3Menu + Power
Buttons
+
When Menu + Power Buttons is selected, the OSD
menu settings cannot be changed and the Power
button is locked.
NOTE: To access the Lock or Unlock menu – Press and hold the Exit
button (button 4) for four seconds.
In the following scenarios, the icon appears at the center of the display:
• When Up button (button 1), Down button (button 2), Menu button (button 3),
or Exit button (button 4) are pressed. This indicates the OSD menu buttons
are in lock state.
• When the Power button (button 5) is pressed. This indicates the Power
button is in lock state.
• When any one of the five buttons are pressed. This indicates OSD menu
buttons and the Power button are in lock state.
Unlocking the OSD menu and Power buttons：
1. Press and hold the Exit button (button 4) for four seconds. The Unlock menu
appears.
2. Select the Unlock icon to unlock the buttons on the display.
Operating your monitor │ 51
OSD warning messages
When the monitor does not support a particular resolution mode, the following
message is displayed:
The current input timing is not supported by the monitor display.
Please change your input timing to 3440x1440, 100Hz or any other
monitor listed timing as per the monitor specications.
Dell 34 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 3440 x
1440.
Before the DDC/CI function is disabled, the following message is displayed:
The function of adjusting display setting using PC application will be
disabled.
Do you wish to disable DDC/CI function?
Yes No
Dell 34 Monitor
S3423DWC
When the monitor enters the Standby Mode, the following message is displayed:
Dell
P2418HZ
Dell 34 Monitor
Going into Standby Mode.
S3423DWC
52 │ Operating your monitor
If you press any button other than the power button, the following messages are
displayed depending on the selected input:
Dell
P2418HZ
Dell 34 Monitor
S3423DWC
Press any key on the keyboard or move the mouse to wake it up.
If there is no display, press the monitor button again to select
the correct input source.
?
No HDMI 1 signal from your device.
If an HDMI or USB-C cable is not connected, a dialog box as shown below is
displayed. The monitor will enter Standby Mode after 4 minutes if left at this state.
Dell
P2418HZ
Dell 34 Monitor
No HDMI 1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3423DWC
?
S3423DWC
or
Dell
P2418HZ
Dell 34 Monitor
No HDMI 2 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3423DWC
?
S3423DWC
or
Operating your monitor │ 53
Dell
P2418HZ
Dell 34 Monitor
No USB-C Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3423DWC
?
S3423DWC
The OSD functions only in the normal operation mode. When any button is pressed
in the Active-off mode, the following message is displayed:
Dell
P2418HZ
Dell 34 Monitor
S3423DWC
Press any key on the keyboard or move the mouse to wake it up.
If there is no display, press the monitor button again to select
the correct input source.
?
No HDMI 1 signal from your device.
Activate the computer and the monitor to gain access to the OSD.
See Troubleshooting for more information.
54 │ Operating your 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 8.1:
3. For Windows 8.1, select the Desktop tile to switch to the Classic desktop.
4. Right-click the desktop and click Screen Resolution.
5. If you have more than one monitor connected, ensure that you select
S3423DWC.
6. Click the Screen Resolution drop-down list and select 3440 x 1440.
7. Click OK.
In Windows 10 and Windows 11:
8. Right-click the desktop and click Display settings.
9. If you have more than one monitor connected, ensure to select S3423DWC.
10. Click the Display Resolution drop-down list and select 3440 x 1440.
11. Click Keep changes.
If you do not see 3440 x 1440 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 portable computer:
• 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 your monitor │ 55
Setting the KVM switch
The built-in KVM switch allows you to control up to 2 computers from a single set
of keyboard and mouse connected to the monitor.
When connecting HDMI + USB-B to computer 1 and USB-C to computer 2, make
sure USB for HDMI is assigned to USB-B .
USB
HDMI 2.0
HDMI 2.0 USB-C
1
3
132
2
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
USB-B
USB-C
PIP/PBP
USB Selection
HDMI 1
HDMI 2
NOTE: The USB-C connection currently supports video and data
transfer.
NOTE: As the USB-C port supports the USB-C Alternate Mode, there
is no need to set USB for USB-C.
NOTE: When connecting to different video input sources not shown
above, follow the same method to make correct settings for USB to
pair the ports.
56 │ Operating your monitor
Setting the Auto KVM
You can follow below instruction to set up Auto KVM for your monitor:
1. Ensure that PIP/PBP Mode is Off.
Display
Brightness / Contrast
Dell 34 Monitor
50% - 50%
75% - 25%
25% - 75%
67% - 33%
33% - 67%
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
O
PIP/PBP
USB Selection
PIP/PBP Mode
2. Ensure that Auto Select is On and Auto Select for USB-C is Yes.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
DP
HDMI 1
Auto Select
O
HDMI 2
Auto Select for USB-C
Reset Input Source
USB-C 65W
On
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
DP
HDMI 1
Auto Select
No
HDMI 2
Auto Select for USB-C
Reset Input Source
USB-C 65W
Yes
Prompt for Multiple Inputs
3. Ensure that the USB ports and the video inputs are paired accordingly.
Display
Brightness / Contrast
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
Others
Others
PersonalizePersonalize
Audio
USB-B
USB-C
PIP/PBP
USB Selection
HDMI 1
HDMI 2
NOTE: For USB-C connection, there is no further setting required.
Operating your monitor │ 57
Using the tilt and vertical extension
NOTE: These values are applicable to the stand that was shipped with
your monitor. To set up with any other stand, see the documentation
that shipped with the stand.
Tilt extension
5° 21°
100mm
4° 4°
NOTE: The stand is detached when the monitor is shipped from the
factory.
NOTE: The slant angle of this monitor is between -4° and +4°, not
allowing for pivot movements.
Vertical extension
NOTE: The stand can be extended vertically up to 100 mm.
100mm
58 │ Troubleshooting
Troubleshooting
WARNING: Before you begin any of the procedures in this section,
follow the Safety instructions.
Self-test
Your monitor provides a self-test feature that allows you to check if 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. Disconnect all video cables from the monitor. This way, the computer does not
have to be involved.
3. Turn on the monitor.
If the monitor is working correctly, it detects that there is no signal, and one of the
following messages appears. While in self-test mode, the power LED remains white.
Dell
P2418HZ
Dell 34 Monitor
No HDMI 1 Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3423DWC
?
S3423DWC
(or)
Dell
P2418HZ
Dell 34 Monitor
No USB-C Cable
The display will go into Standby Mode in 4 minutes.
www.dell.com/S3423DWC
?
S3423DWC
NOTE: This box also appears during normal system operation, if the
video cable is disconnected or damaged.
Troubleshooting │ 59
4. Turn off your monitor and reconnect the video cable; and then turn on your
computer and the monitor.
If your monitor remains dark after you reconnect the cables, check your video
controller and computer.
Built-in diagnostics
Your monitor has a built-in diagnostic tool. It helps you determine if the screen
abnormality that you are experiencing is an inherent problem with your monitor, or
with your computer and video card.
1 52 3 4
To run the built-in diagnostics:
1. Ensure that the screen is clean (no dust particles on the surface of the
screen).
2. Press the button (button three) to launch the OSD menu.
3. Using the front-panel buttons, select Others > Self-Diagnostic to initiate
the self-diagnostic process.
Dell 34 Monitor
Display
Dell 34 Monitor
Input Source
Color
Menu
Audio
Menu
PersonalizePersonalize
Audio
PIP/PBP
USB Selection
Others
Brightness / Contrast
DDC/CI
Display Info
Reset Others
Factory Reset
LCD Conditioning
Service Tag
Self-Diagnostic
Firmware
O
On
00X000
ABCDEFG
4. When initiated, a gray screen appears. Inspect the screen for abnormalities.
5. Press button 1 on the front-panel. The color of the screen changes to red.
Inspect the screen for abnormalities.
60 │ Troubleshooting
6. Repeat step 5 and inspect the screen when it displays the green, blue, black,
and white colors, followed by onscreen text.
7. The test is complete when the onscreen text appears. To exit, press the front-
panel buttons again.
If you do not detect any screen abnormalities upon using the Built-in diagnostics-
tool, the monitor is functioning properly. Check the video card and computer.
Troubleshooting │ 61
Common problems
The following table contains general information about common monitor problems
you might encounter and the possible solutions:
Common
Symptoms
Possible Solutions
No video or vower
LED off
• 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.
• Ensure that the correct input source is selected using
the Input Source menu.
No video or power
LED on
• Increase brightness and contrast controls using the 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 using
the Input Source menu.
Poor focus • Eliminate video extension cables.
• Reset the monitor to factory settings (Factory Reset).
• Change the video resolution to the correct aspect ratio.
Shaky or jittery Video • Reset the monitor to factory settings (Factory Reset).
• Check environmental factors.
• Relocate the monitor, and test in another room.
Missing pixels • 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:
www.dell.com/support/monitors.
62 │ Troubleshooting
Common
Symptoms
Possible Solutions
Stuck-on pixels • 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:
www.dell.com/support/monitors
Brightness problems • Reset the monitor to factory settings (Factory Reset).
• Adjust brightness & contrast controls using OSD.
Geometric distortion • Reset the monitor to factory settings (Factory Reset).
• Adjust horizontal & vertical controls using OSD.
Horizontal or vertical
Lines
• Reset the monitor to factory settings (Factory Reset).
• 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.
Synchronization
problems
• Reset the monitor to factory settings (Factory Reset).
• 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.
Safety-related issues • Do not perform any troubleshooting steps.
• Contact Dell immediately.
Intermittent
problems
• Ensure that the video cable connecting the monitor to
the computer is connected properly and is secure.
• Reset the monitor to factory settings (Factory Reset).
• Perform monitor self-test feature check to determine if
the intermittent problem occurs in self-test mode.
Troubleshooting │ 63
Common
Symptoms
Possible Solutions
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.
Wrong color • Try different Preset Modes in Color settings OSD.
Adjust R/G/B value in Custom Color in Color settings
OSD.
• Change the Input Color Format to RGB or YCbCr in
the Color settings OSD.
• Run the built-in diagnostics.
Image retention from
a static image left
on the monitor for a
long period of time
• 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.
Video ghosting or
overshooting
• Change the Response Time in the Display OSD to
Normal, Fast or Extreme depending on your application
and usage.
64 │ Troubleshooting
Product-specific problems
Specific
Symptoms
Possible Solutions
Screen image is too
small
• Check the Aspect Ratio setting in the Display settings
OSD.
• Reset the monitor to factory settings (Factory Reset).
Cannot adjust the
monitor with the
buttons on the
bottom of the panel
• Turn off the monitor, unplug the power cord, plug it back,
and then turn on the monitor.
• Check if the OSD menu is locked. If yes, press and hold
the menu button for six seconds to unlock.
No input signal
when user controls
are pressed
• Check the signal source. Ensure that the computer is not
in standby or sleep mode by moving the mouse or pressing
any key on the keyboard.
• Check if the video cable is plugged in properly. Disconnect
and reconnect the video cable if necessary.
• Reset the computer or video player.
The picture does
not fill the entire
screen
• Due to different video formats (aspect ratio) of DVDs, the
monitor may display in full screen.
• Run the built-in diagnostics.
Regulatory information │ 65
Regulatory information
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.
EU product database for energy label and product information
sheet
S3423DWC: https://eprel.ec.europa.eu/qr/1107221.
Contacting Dell
To contact Dell for sales, technical support, or customer service issues, see www.
dell.com/contactdell.
NOTE: Availability varies by country and product, and some services
may not be available in your country.
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.