Dell P3421W User manual

Dell P3421W Monitor
User’s Guide
Model: P3421W
Regulatory model: P3421Wb

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 © 2020 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.
2020 - 10
Rev. A00

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Contents
About your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Package contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Identifying parts and controls . . . . . . . . . . . . . . . . . . . . . . 9
Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Monitor specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Resolution specifications. . . . . . . . . . . . . . . . . . . . . . . . . 14
Supported video modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preset display modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Plug and play capability . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Universal Serial Bus (USB) interface . . . . . . . . . . . . . . . . 21
SuperSpeed USB 5 Gbps (USB 3.2 Gen1). . . . . . . . . . . . . . . . . . . . 21
USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
USB Type-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
USB 3.2 Gen1 (5 Gbps) upstream connector . . . . . . . . . . . . . . . . 22
USB 3.2 Gen1 (5 Gbps) downstream connector . . . . . . . . . . . . . . 22
USB 2.0 downstream connector . . . . . . . . . . . . . . . . . . . . . . . . . . 23
USB Type-C connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
USB ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LCD monitor quality and pixel policy . . . . . . . . . . . . . . . . 24
Maintenance guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4  │ 
Cleaning your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Setting up the monitor . . . . . . . . . . . . . . . . . . . . . . 25
Attaching the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Connecting your monitor . . . . . . . . . . . . . . . . . . . . . . . . . 28
Connecting the DisplayPort (DisplayPort to DisplayPort) cable. . 29
Connecting the HDMI cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Connecting the USB Type-C cable . . . . . . . . . . . . . . . . . . . . . . . . 31
Connecting the USB 3.2 Gen1 (5 Gbps) cable . . . . . . . . . . . . . . . . 31
Organizing your cables. . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Removing the monitor stand . . . . . . . . . . . . . . . . . . . . . . 33
VESA wall mounting (optional) . . . . . . . . . . . . . . . . . . . . 34
Operating the monitor . . . . . . . . . . . . . . . . . . . . . . 35
Power on the monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Using the joystick control . . . . . . . . . . . . . . . . . . . . . . . . 35
Using the On-Screen Display (OSD) menu . . . . . . . . . . . 36
Accessing the Menu Launcher. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Using the navigation keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Accessing the menu system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
OSD warning message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Setting the maximum resolution . . . . . . . . . . . . . . . . . . . 59
Setting the KVM switch . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Setting the Auto KVM . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Using the tilt, swivel, and vertical extension . . . . . . . . . . 64
Tilt, swivel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Vertical extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Slant adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

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Built-in diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Common problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Product specific problems . . . . . . . . . . . . . . . . . . . . . . . . 72
Universal Serial Bus (USB) specific problems . . . . . . . . . 73
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
FCC notices (U.S. only) and other regulatory
information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Contact Dell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
EU product database for energy label and product
information sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6  │  About your monitor
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 cable
(DisplayPort to DisplayPort)
HDMI cable
USB Type-C cable (USB 3.2
Gen1 (5 Gbps))
USB 3.2 Gen1 (5 Gbps)
upstream cable (enables the
USB ports on the monitor)
Cable tie
• Quick Setup Guide
• Safety, Environmental,
and Regulatory
Information

8  │  About your monitor
Product features
The Dell P3421W monitor has an active matrix, Thin-Film Transistor (TFT), Liquid
Crystal Display (LCD) and LED backlight. The monitor features include:
• 86.72 cm (34.14 in.) viewable area (measured diagonally).
3440 x 1440 (21:9) resolution, plus full-screen support for lower resolutions.
• Wide viewing angle to allow viewing from a sitting or standing position.
• Color gamut of 99% sRGB.
• Digital connectivity with DisplayPort, USB Type-C and HDMI.
• Single USB Type-C to supply power (PD 65 W) to a compatible notebook
while receiving video & data signal.
• Tilt, swivel, height, and slant adjustment capabilities.
• Ultra-thin bezel minimizes the bezel gap in multi-monitor usage, enabling
easier setup with an elegant viewing experience.
• Removable stand and Video Electronics Standards Association (VESA™)
100 mm mounting holes for flexible mounting solutions.
• Equipped with 1 USB Type-C upstream port, 1 USB Type B upstream port, and
4 USB Type-A downstream ports.
• Plug and play capability if supported by your system.
• 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.
• On-Screen Display (OSD) adjustments for ease of set-up and screen
optimization.
• Supports Picture by Picture (PBP) and Picture in Picture (PIP) Select mode.
• Power and joystick buttons lock.
• Security lock slot.
• Stand lock.
• < 0.3 W in Standby Mode.
• Optimize eye comfort with a flicker-free screen.
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 feature is designed to reduce
the amount of blue light emitted from the monitor to optimize eye
comfort.

About your monitor  │  9
Identifying parts and controls
Front view
Label Description
1Power LED indicator
Solid white light indicates that the monitor is turned on and functioning
normally. Blinking white light indicates that the monitor is in Standby
Mode.

10  │  About your monitor
Back view
Back view with monitor stand
Label Description Use
1VESA mounting holes (100 mm
x 100 mm - behind attached
VESA Cover)
Wall mount monitor using VESA-
compatible wall mount kit (100 mm x
100 mm).
2Regulatory label Lists the regulatory approvals.
3Stand release button Releases stand from the monitor.
4Barcode, serial number, and
Service T
ag label
Refer to this label if you need to
contact Dell for technical support.
5Power On/Off button To turn the monitor on or off.
6Joystick Use to control the OSD menu. (For
more Information, see Operating the
monitor)
7Cable-management slot Use to organize cables by inserting
them through the slot.