Dell S2721D Service Manual

Dell S2721D/S2721DS Monitor

User’s Guide

Model: S2721D/S2721DS
Regulatory model : S2721Db

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 Del l Inc. or its subsidiaries. Al l 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 - 08

Rev. A00

Contents

Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About your monitor. . . . . . . . . . . . . . . . . . . . . . . . . . 7

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Identifying parts and controls . . . . . . . . . . . . . . . . . . . . . 10

Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Resolution specifications. . . . . . . . . . . . . . . . . . . . . . . . . 16

Supported video modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Preset display modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Power management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

LCD monitor quality and pixel policy . . . . . . . . . . . . . . . . 23

Ergonomics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Handling and moving your display . . . . . . . . . . . . . . . . . . 25

Maintenance guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Cleaning your monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Setting up the monitor . . . . . . . . . . . . . . . . . . . . . . 27

Connecting the stand - S2721D . . . . . . . . . . . . . . . . . . . . 27

Connecting the stand - S2721DS . . . . . . . . . . . . . . . . . . . 30

Connecting your monitor . . . . . . . . . . . . . . . . . . . . . . . . . 33

  │  3

Connecting the HDMI and power cables . . . . . . . . . . . . . . . . . . . . 33

Connecting the DisplayPort (DP to DP) cable (optional) and power

cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Organizing your cables. . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Turning on your monitor. . . . . . . . . . . . . . . . . . . . . . . . . . 35

Securing your monitor using Kensington lock (optional). 36

Removing the monitor stand - S2721D. . . . . . . . . . . . . . . 37

Removing the monitor stand - S2721DS. . . . . . . . . . . . . . 38

VESA wall mounting (optional) . . . . . . . . . . . . . . . . . . . . 39

Operating the monitor . . . . . . . . . . . . . . . . . . . . . . 40

Power on the monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Using the front-panel controls. . . . . . . . . . . . . . . . . . . . . 40

Front-panel button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Using the On-Screen Display (OSD) menu . . . . . . . . . . . 42

Accessing the menu system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

OSD warning message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Setting the maximum resolution . . . . . . . . . . . . . . . . . . . 56

Using the tilt, swivel, and vertical extension . . . . . . . . . . 57

Tilt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Swivel (S2721DS only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Vertical extension (S2721DS only). . . . . . . . . . . . . . . . . . . . . . . . . 58

Rotating the display (S2721DS onl y) . . . . . . . . . . . . . . . . 58

Rotate clockwise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Rotate counterclockwise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Adjusting the rotation display settings of your system . . 60

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Sel f-test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Built-in diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Common problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

4  │ 

Product specific problems . . . . . . . . . . . . . . . . . . . . . . . . 66

Speakers Specific Problems . . . . . . . . . . . . . . . . . . . . . . 67

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

FCC notices (U.S. only) and other regulatory

information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Contact Dell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

  │  5

Safety instructions

CAUTION: 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 careful ly. 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.

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. 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 connecting a stand that you purchased from any other
source, follow the set up instructions that were included with the
stand.

Component image Component description

Display

Stand riser:

a. S2721D

b. S2721DS

Stand base:

721D

a. S2

b. S2721DS

About your monitor  │  7

VESA™ screw cover
(S2721D only)

Power cable (varies by
country)

HDMI cable

•Quick Setup Guide

• Safety, Environmental,
and R

egulatory

Information

8  │  About your monitor

Product features

The Dell S2721D/S2721DS monitor has an active matrix, Thin-Film Transistor
(TFT), Liquid Crystal Display (LCD) and LED backlight. The monitor features
include:

• 68.47 cm (27 in.) viewable area (measured diagonall y).
2560 x 1440 (16:9) resolution, plus ful l-screen support for lower resolutions.

• Supports AMD FreeSync™, with a refresh rate of 75 Hz and a rapid response
time of 4 ms gray to gray in Extreme mode*.

• Color gamut of 99% sRGB.

• Digital connectivity with DisplayPort and HDMI.

• S2721D: Tilt capability.

• S2721DS: Tilt, swivel, pivot, and height adjustment capabilities.

• Dual buil t-in speakers.

• Removable stand and Video Electronics Standards Association (VESA™)
100

mm mounting holes for flexible mounting solutions.

• 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.

•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.

*The 4 ms gray-to-gray mode is achievable in the Extreme mode to reduce visible
motion blur and increased image responsiveness. However, this may introduce
some slight and noticeable visual artifacts into the image. As every system setup
and every user's needs are different, we recommend that users experiment with
the different modes to find the setting that is right for them.

About your monitor  │  9

Identifying parts and controls

Front view

S2721D

S2721DS

Label Description Use

1 Function buttons For more information, see Operating

the monitor.

2 Power On/Off button (with

LE

D indicator)

10  │  About your monitor

To turn the monitor on or off.

Back view

S2721D

S2721DS

Back view with monitor stand

Back view with monitor stand

Label Description Use

1 VESA mounting holes (100 mm

00 mm - behind attached

x 1
VESA Cover)

Wall mount monitor using VESA­compatible wall mount kit (100 mm x
100 mm).

About your monitor  │  11

2 Barcode, serial number, and

Service Tag label

3 Stand release button Releases stand from the monitor.

4 Regulatory label Lists the regulatory approvals.

5 Cable-management slot Use to organize cables by inserting

Refer to this label if you need to
contact Dell for technical support.
The Service Tag is a unique
alphanumeric identifier that enables
Del l service technicians to identify
the hardware components in your
monitor and access warranty
information.

them through the slot.

12  │  About your monitor

Bottom view

S2721D

S2721DS

Bottom view without monitor stand

Bottom view without monitor stand

Label Description Use

1 Security lock slot Secures the monitor with security lock

security lock not included).

(

2 Power connector Connect the power cable (shipped with your

mo

nitor).

About your monitor  │  13

3 HDMI port (HDMI 1) Connect your computer with the HDMI cable

(shipped with your monitor).

4 HDMI port (HDMI 2) Connect your computer with the HDMI cable

(shipped with your monitor).

5 DisplayPort Connect your computer with the DisplayPort

cable.

6 Line-out port Connect your speakers.

NOTE: This port does not support

headphones.

7 Speakers Provides audio output.

14  │  About your monitor

Monitor specifications

Model S2721D S2721DS

Screen type Active matrix - TFT LCD

Panel technology IPS

Aspect ratio 16:9

Viewable image

Diagonal

Width (active area)

Height (active area)

Tot a l a re a

Pixel pitch 0.2331 x 0.2331 mm

Pixel per inch (PPI) 108.79

Viewing angle

Vertica l

Horizontal

Luminance output 350 cd/m² (typical)

Contrast ratio 1000 to 1 (typical)

Faceplate coating Anti-Glare treatment of the front polarizer (Haze 25%,

Backlight White LED edgelight system

Response time 8 ms gray to gray in Normal mode

684.7 mm (27 in.)

596.7 mm (23.49 in.)

335.7 mm (13.21 in.)

200312.2 mm2 (310.30 in.2)

178° (typical)

178° (typical)

3H)

5 ms gray to gray in Fast mode

4 ms gray to gray in Extreme mode*

*The 4 ms gray-to-gray mode is achievable in the
Extreme mode to reduce visible motion blur and
increased image responsiveness. However this may
introduce some slight and noticeable visual artifacts into
the image. As every system setup and every user's needs
are different, we recommend that users experiment with
the different modes to find the setting that is right for
them.

About your monitor  │  15

Color depth 16.7 mil lion colors

Color gamut sRGB 99% (typical)

Connectivity • 1 x DisplayPort version 1.2

•2 x HDMI ports version 1.4

• 1 x audio line-out port

Border width (edge of monitor to active area)

To p

Left/Right

Bottom

Adjustability

Ti l t

Swivel

Pivot

Height adjustable
st

and

Built-in speakers 2 x 3 W sound output

Del l Display Manager
comp

atibility

Security Security lock slot (cable lock sold separately)

7.4 m m

7.4 m m/ 7.4 mm

21.6 mm

-5° to 21°

Not applicable

Not applicable

Not applicable

Easy Arrange and other key features

-5° to 21°

-30° to 30°

-90° to 90°

110 mm

Resolution specifications

Model S2721D/S2721DS

Horizontal scan range 30 kHz to 115 kHz (automatic)

Vertical scan ra nge 48 Hz to 75 Hz (automatic)

Maximum preset resolution 2560 x 1440 at 75 Hz

Supported video modes

Model S2721D/S2721DS

Video display capabilities (HDMI
& Disp

layPort)

16  │  About your monitor

480p, 480i, 576p, 576i, 720p, 1080i, 1080p,
QHD

Preset display modes

Display mode Horizontal

equency

fr

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

2048 x 1080

2560 x 1440

2560 x 1440

Vertical

frequency

(kHz)

31.50 70.10 28.30 -/+

31.50 59.90 25.20 -/-

37.50 75.00 31.50 -/-

37.90 60.30 40.00 +/+

46.90 75.00 49.50 +/+

48.40 60.00 65.00 -/-

60.00 75.00 78.80 +/+

67.50 75.00 108.00 +/+

64.00 60.00 108.00 +/+

80.00 75.00 135.00 +/+

60.00 60.00 108.00 +/+

67.50 60.00 148.50 +/+

66.70 60.00 147.18 +/-

88.80 59.95 241.50 +/-

111.90 74.97 304.25 +/-

(Hz)

Pixel

clock

(MHz)

Sync

polarity

(Horizontal

/Vertical)

NOTE: This monitor supports AMD FreeSync™.

Electrical specifications

Mo

del S2721D/S2721DS

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

l

ine, 100 Ω input impedance per differential pair

AC input vo l tage/
fr

equency/current

Inrush current • 120 V: 30 A (Max.) at 0°C (cold start)

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

• 240 V: 60 A (Max.) at 0°C (cold start)

About your monitor  │  17

Physical characteristics

Model S2721D S2721DS

Signal cable type

NOTE: Dell monitors are designed to work optimal l y 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.

Dimensions (with stand)

Height 453.4 mm (17.85 in.) • Extended:

Width 611.6 mm (24.08 in.) 611.6 mm (24.08 in.)

Depth 186.8 mm (7.35 in.) 174.7 mm (6.88 in.)

Dimensions (without stand)

Height 364.6 mm (14.35 in.) 364.6 mm (14.35 in.)

Width 611.6 mm (24.08 in.) 611.6 mm (24.08 in.)

Depth 55.4 mm (2.18 in.) 55.4 mm (2.18 in.)

Stand dimensions

Height 176.0 mm (6.93 in.) • Extended:

Width 257.2 mm (10.13 in.) 257.0 mm (10.12 in.)

Depth 186.8 mm (7.35 in.) 174.7 mm (6.88 in.)

Weight

Weight with packaging 7.9 kg (1 7.42 l b) 8.9 kg (19.62 lb)

Weight with stand
assembl y and cables

• Digital: HDMI, 19 pins

• Digital: DisplayPort, 20 pins (cable not supplied)

510.1 mm (20.08 in.)

• Compressed:

400.1 mm (15.75 in.)

403.1 mm (15.87 in.)

• Compressed:

364.8 mm (14.36 in.)

5.4 kg (11.90 l b) 6.2 kg (13.67 lb)

18  │  About your monitor

Weight without stand
as

sembly (For wall mount
or VESA mount
considerations - no
cables)

Weight of stand assembly 0.7 kg (1.54 lb) 1.5 kg (3.31 lb)

Environmental characteristics

Model S2721D/S2721DS

liant standards

Comp

• ENERGY STAR certified monitor

• RoHS-compliant

• TCO certified displays

• BFR/PVC-reduced monitor (excluding external cables)

• Arsenic-free glass and Mercury-free for the panel only

Te m p e ra t u re

Operating 0°C to 40°C (32°F to 104°F)

Non-operating • Storage: -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)

Altitude

Operating 5,000 m (16,404 ft) (maximum)

Non-operating 12,192 m (40,000 ft) (maximum)

Thermal dissipation

4.4 kg (9.70 lb) 4.4 kg (9.70 lb)

• Shipping: -20°C to 60°C (-4°F to 140°F)

• Shipping: 5% to 90% (non-condensing)

• 119.42 BTU/hour (maximum)

•64.83 BTU/hour (typical)

About your monitor  │  19

Power management modes

If you have a VESA DPM™ compliant display card or software installed on your
computer, the monitor can automatically reduce its power consumption when not in
use. This is referred to as Standby Mode*. If the computer detects input from the
keyboard, mouse, or other input devices, the monitor automatically resumes to
function. The following table shows the power consumption and signaling of this
automatic power saving feature:

VESA

modes

Normal
oper

ation

Horizontal

nc

sy

Vertical

sync

Active Active Active White 40 W

Video Power

indicator

Power

consumption

(maximum)**

19 W (typical)

Active-off
mode

Inactive Inactive Blanked White

(br

eathing)

Less than 0.3 W

Switch off - - - Off Less than 0.3 W

Power Consumption P

on

17.5 W

Total Energy Consumption (TEC) 54.68 kWh

*Zero power consumption in OFF mode can only be achieved by disconnecting the
m

ain cable from the monitor.

**Maximum power consumption with max luminance.

This document is informational only and reflects labor

atory 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.

NOTE: This monitor is ENERGY STAR certified.
This product qualifies for ENERGY STAR in the factory

lt settings which can be restored by “Factory Reset”

defau
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.

20  │  About your monitor

NOTE:

: Power consumption of On mode as defined in Energy Star 8.0

P

on

version.
TEC: Total energy consumption in kWh as
version.

Pin assignments

DisplayPort connector

defined in Energy Star 8.0

Pin

number

20-pin side of the

connected signal cable

1 ML3 (n)

2 GND

3 ML3 (p)

4 ML2 (n)

5 GND

6 ML2 (p)

7 ML1 (n)

8 GND

9 ML1 (p)

10 ML0 (n)

11 GND

12 ML0 (p)

13 GND

14 GND

15 AUX (p)

16 GND

17 AUX (n)

18 Hot Plug Detect

About your monitor  │  21

19 Re-PWR

20 +3.3 V DP_PWR

HDMI connector

Pin

number

1 TMDS DATA 2+

2 TMDS DATA 2 SHIELD

3 TMDS DATA 2-

4 TMDS DATA 1+

5 TMDS DATA 1 SHIELD

6 TMDS DATA 1-

7 TMDS DATA 0+

8 TMDS DATA 0 SHIELD

9 TMDS DATA 0-

10 TMDS CLOCK+

11 TMDS CLOCK SHIELD

12 TMDS CLOCK-

13 CEC

14 Reserved (N.C. on device)

15 DDC CLOCK (SCL)

16 DDC DATA (SDA)

17 DDC/CEC Ground

18 +5 V POWER

19 HOT PLUG DETECT

19-pin side of the

connected signal cable

22  │  About 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

www.del l.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 shel ves 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.

• 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.

About your monitor  │  23

• Always leave space to rest your hands while using the keyboard or mouse.

monitor screen at or
below eye level

monitor and
keyboard
positioned
directly in front
of the user

feet flat on the
floor

wrists relaxed
and flat

• Let your upper arms rest natural l y 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

and work for extended periods of time. Try to stand or get up and walk

sit
around at regular intervals.

• Keep the area under your desk clear of obstructions and cables or power

ds that may interfere with comfortable seating or present a potential trip

cor
hazard.

24  │  About your monitor

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 al l 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 monit
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.

or firmly without appl ying

• When transporting the monitor, avoid any sudden shock or vibration to it.

About your monitor  │  25

• 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

CAUTION: Read and follow the Sa
monitor.

WARNING: Before cleaning the monitor, unplug the monitor power
cable from the electrical outlet.

For best practices, follow the instructions
cleaning, or handling your monitor:

• To clean your anti-static screen, lightly dampen a soft, clean cloth with water.

ossible, use a special screen-cleaning tissue or solution suitable for the

If p
anti-static coating. Do not use benzene, thinner, ammonia, abrasive cleaners,
or compressed air.

• Use a lightl y-dampened, warm cloth to clean the monitor. Avoid using

tergent of any kind as some detergents leave a milky film on the monitor.

de

• If you notice white powder when you unpack
cloth.

• Handle your monitor with care as a darker-colored monitor may get scratched
and sho

• To help maintain the best image quality on your monitor, use a dynamical l y
chan

w white scuff marks more than a lighter-colored monitor.

ging screen saver and turn off your monitor when not in use.

fety instructions before cleaning the

in the list below when unpacking,

your monitor, wipe it off with a

26  │  About your monitor

Setting up the monitor

Connecting the stand - S2721D

NOTE: The stand is not factory-installed.

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 attach the monitor stand:

ol low the instructions on the flaps of packaging box to remove the stand

1. F
from the top cushion that secures it.

emove the VESA cover, stand base, and stand riser from the packaging

2. R
cushion.

Setting up the monitor  │  27

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.

lose the screw handle.

5. C

6. Open the protective cover to access the VESA slot on the display.

7. Align and insert the stand assembly bracket into the groove on the back of the

display until it locks in place.

28  │  Setting up the monitor

8. Install the VESA screw cover.

9. Place the monitor in an upright position, and lift the protective cover from the

monitor.

Setting up the monitor  │  29

Connecting the stand - S2721DS

NOTE: The stand is not factory-installed.

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 attach the monitor stand:

ol low the instructions on the flaps of packaging box to remove the stand

1. F
from the top cushion that secures it.

emove the stand base and stand riser from the packaging cushion.

2. R

3. Align and place the stand riser on the stand base.

4. Open the

to secure the stand assembly.

lose the screw handle.

5. C

30  │  Setting up the monitor

screw handle at the bottom of the stand base and turn it clockwise

6. Open the protective cover to access the VESA slot on the display.

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 until it snaps into place.

Setting up the monitor  │  31

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.

9. L

ift the protective cover from the monitor.

32  │  Setting up the monitor

Connecting your monitor

WARNING: Before you begin any of the procedures in this section,
fol low the Safety instructions.

NOTE: Dell monitors are designed to work optimally with Dell supplied
inbox cables. Dell does
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 images are for the purpose of illustration only. Appearance
of the computer may vary.

To connect your monitor to the computer:

urn Off your computer and disconnect the power cable.

1. T

2. Conne

Connecting the HDMI and power cables

S2721D

ct the HDMI or DisplayPort cable from your monitor to the computer.

not guarantee the video quality and performance

S2721DS

Setting up the monitor  │  33

Connecting the DisplayPort (DP to DP) cable (optional) and power cable

S2721D

S2721DS

Organizing your cables

S2721D S2721DS

After attaching all necessary cables to your monitor and computer, (See

Connecting your monitor for cable attachment,) organize all cables as shown

above.

34  │  Setting up the monitor

Turning on your monitor

S2721D

S2721DS

Setting up the monitor  │  35

Securing your monitor using Kensington lock (optional)

The security lock slot is located at the bottom of the monitor. (See Security lock

slot)

For more information on using th
documentation that is shipped with the lock.

Secure your monitor to a table using the Kensington security lock.

S2721D

S2721DS

e Kensington lock (purchased separately), see the

NOTE: The image is for the purpose of illustration only. Appearance of
the lock may vary.

36  │  Setting up the monitor

Removing the monitor stand - S2721D

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 removing the
stand that was shipped with your monitor. If you are removing a stand
that you purchased from any other source, follow the set up
instructions that were included with the stand.

To remove the stand:

ace the monitor on a soft cloth or cushion.

1. Pl

2. Pr

ess the dimple on the VESA cover to release it from the back of the display.

3. Using a long screwdriver, push the release latch located in the gap just above
the stand.

e the latch is released, slide the stand assembl y away from the monitor.

4. Onc

Setting up the monitor  │  37

Removing the monitor stand - S2721DS

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 removing the
stand that was shipped with your monitor. If you are removing a stand
that you purchased from any other source, follow the set up
instructions that were included with the stand.

To remove the stand:

ace the monitor on a soft cloth or cushion.

1. Pl

2. Pr

ess and hold the stand release button at the back of the display.

3. L

ift the stand assembl y up and away from the monitor.

38  │  Setting up the monitor

VESA wall mounting (optional)

S2721D

S2721DS

(Screw dimension: M4 x 10 mm).

Read the instructions that shipped with the VESA-compatible wall mounting kit.

1. Pl

ace the display on a soft cloth or cushion on a stable flat table.

2. R

emove the monitor stand. (See Removing the monitor stand - S2721D and

Removing the monitor stand - S2

3. Using

4. Inst

5. Moun

a Phillips screwdriver, remove the four screws that secure the display

back cover.

all the mounting bracket from the wall mounting kit to the display.

t the monitor on the wall. For more information, see the documentation

that shipped with the wall mounting kit.

721DS)

NOTE: For use only with UL or CSA or GS-listed wall mount bracket
with minimum weight or load bearing capacity of 17.6 kg (S2721D/
S2721DS).

Setting up the monitor  │  39

Operating the monitor

Power on the monitor

Press the Power button to turn On the monitor.

Using the front-panel controls

Use the control buttons on the front of the monitor to adjust settings.

The following table describes the front-panel buttons:

Front-panel button Description

1

Shortcut key/
Preset Modes

2

Shortcut key/

Volum e

40  │  Operating the monitor

Use this button to choose from a list of preset color

s.

mode

To directly access the Vo

lume adjustment slider.

3

Menu

4

Exit

5

Power

(with power light

indicator)

Front-panel button

Use the buttons on the front of the monitor to

Use the ME
Display (OSD). See Accessing the menu system.

Use this button to exit the OSD main menu.

Use the Po
Off.

The white light indicates the monitor is On and
functional. A breathing white light indicates Standby
mode.

NU button to launch the On-Screen

wer button to turn the monitor On and

fully

adjust the image settings.

Front-panel button Description

1

Up

2

Down

3

OK

4

Back

Use the Up but
the OSD menu.

Use the Do
in the OSD menu.

Use the OK but

Use the Back b

ton to adjust (increase ranges) items in

wn button to adjust (decrease ranges) items

ton to confirm your selection.

utton to go back to the previous menu.

Operating the monitor  │  41

Using the On-Screen Display (OSD) menu

Accessing the menu system

NOTE: If you change the settings and then either proceed to another
menu or exit the OSD menu, the monitor automatically saves those
changes. The changes are also saved if you change the settings and
then wait for the OSD menu to disappear.

ess the button to launch the OSD menu and display the main menu.

1. Pr

2. Press the and buttons to move between the setting options. As you

move from one icon to another, the option name is highlighted. See the
f

ollowing table for a complete list of all the options available for the monitor.

3. Pr

ess the or or button once to activate the highlighted option.

NOTE: The directional buttons (and the OK button) displayed may
differ according to the menu you’ve selected. Use available buttons to
make your selection.

ess the and buttons to select the desired parameter.

4. Pr

ess to enter the submenu and then use the directional buttons,

5. Pr
according to the indicators on the menu, to make your changes.

6. Se

lect the button to return to the main menu.

42  │  Operating the monitor

Icon Menu and

Submenus

Brightness/

Contrast

Brightness Brightness adjusts the luminance of the backlight.

Description

Use this menu to activate Brightness/Contrast
adjustment.

Press the

press the
0 / max. 100).

Contrast Adjusts the Br

Contrast only if further adjustment is necessary.

Press the

press the
/ max. 100).

The Co
difference between darkness and lightness on the
monitor screen.

ntrast function adjusts the degree of

button to increase the brightness and

button to decrease the brightness (min.

ightness first, and then adjust the

button to increase the contrast and

button to decrease the contrast (min. 0

Operating the monitor  │  43

Input Source Use the Input Source menu to select 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
confirm the selection.

HDMI 1 Select the HDM

HDMI connector. Press the
selection.

HDMI 2 Select the HDM

HDMI connector. Press the
selection.

Auto Select Turning on the function al lows you to scan for

availab

le input sources.

Reset Input

Sour

ce

Resets your monitor input settings to the factory
settings.

I 1 input when you are using the

button to confirm the

I 2 input when you are using the

button to confirm the

button to

44  │  Operating the monitor

Color Use Color to adjust the color setting mode.

Preset Modes Allows you to choose a preset mode from the list.

• Standard: Loads the monitor's default color
settings. This is the default preset mode.

Operating the monitor  │  45

Preset Modes • ComfortView: Decreases the level of blue light

emitted from the screen to make viewing more
comfortable for your eyes.

WARNING: The possible long-term effects of
blue light emission from the monitor may
cause personal injury ch as digital eye strain,
eye fatigue and damage to the eyes. Using
monitor for extended periods of time may
also cause pain in parts of body such as neck,
arm, back and shoulder. For more
information, see Ergonomics.

• Movie: Loads color settings ideal for movies.

• FPS: Loads color settings ideal for First-Person
Shooter (FPS) games.

• RTS: Loads color settings ideal for Real-Time
Strategy (RTS) games.

• RPG: Loads color settings ideal for Role-Playing
Games (RPG).

• 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: Al lows you to manual l y adjust the
color settings.

Use the arrow buttons to adjust the three colors
(R, G, B) values and create your own preset color
mode.

46  │  Operating the monitor

Input Color

Format

Allows you to set the video input mode to:

• RG

B: Select this option if your monitor is
connected to a computer (or media player) using
the DisplayPort or HDMI cable.

• YPbPr: Se
supports only YPbPr output.

lect this option if your media player

Press the

Hue This feature can shift the color of the video image to

green or purple. This is used to adjust the desired

flesh tone color. Use
'0' to '100'.

NOTE: Hue
select Movie, FPS, RTS, or RPG preset mode.

Saturation This feature can adjust the color saturation of the

video image
from '0' to '100'.

NOTE: Saturation adjus
when you select Movie, FPS, RTS, or RPG preset
mode.

Reset Color Resets your monitor’s color settings to the factory

se

ttings.

button to confirm the selection.

or to adjust the hue from

adjustment is available only when you

. Use

or to adjust the saturation

tment is available onl y

Operating the monitor  │  47

Display Use the Display menu to adjust images.

Aspect Ratio Adjusts the image ratio to Wide 16:9, 4:3, or 5:4.

Sharpness This feature can make the image look sharper or

so

fter.

Use
'100'.

Response Time Allows you to set the R

Fast, or Extreme.

Reset Display Resets all display settings to the factory preset

v

or to adjust the sharpness from '0' to

esponse Time to Normal,

alues.

48  │  Operating the monitor

Audio

Volume Allows you to set the volume level of speakers.

Use
'100'.

Speaker Allows you to enable or disable the speaker function.

Reset Audio Select this option to restore default audio settings.

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.

Language Sets the OSD display to one of the eight languages

(English, Spanish, French, German, Brazilian
Portuguese, Russian, Simplified Chinese, or
Japanese).

Tran sp ar ency Select this option to change the menu transparency

or to adjust the volume level from '0' to

pressing the

by

100).

and buttons (min. 0 / max.

Operating the monitor  │  49

Tim er Sets the length of time the OSD wil l remain active

after the last time you pressed a button.

Use
increments, from 5 to 60 seconds.

Lock With the control buttons on the monitor locked, you

can
also prevents accidental activation in multiple
monitors side-by-side setup.

• Menu Buttons: All Menu/function buttons

• Po

• Menu

The default setting is Disab

Alternative Lock Method [for Menu/function
but
function button next to the Power button for 4
seconds to set the lock options.

NOTE: T
Menu/function button next to the Power button for
4 seconds.

Reset Menu Resets all OSD settings to the factory preset values.

or to adjust the slider in 1 second

prevent people from accessing the controls. It

(except the Power button) are locked and not
accessible by the user.

wer Button: Onl y the Power button is locked

and not accessible by the user.

+ Power Buttons: Both the Menu/
function & Power buttons are locked and not
accessible by the user.

le.

tons]: You can also press and hold the Menu/

o unlock the button(s), press and hold the

50  │  Operating the monitor

Personal ize

Shortcut Key 1 Al lows you to choose a feature from Preset Modes,

Shortcut Key 2

Power Button

LED

Reset

Pe

rsonalization

Brightness/Contrast, Input Source, Aspect
Ratio, or Volume and set it as a shortcut key.

Allows you to set the power LED indicator on or off

o save energy.

t

Resets all settings under the Personal ize menu to
the factory preset values.

Operating the monitor  │  51

Others Select this option to adjust the OSD settings, such as

DDC/CI, LCD Conditioning, and so on.

Display Info Displays the monitor's current settings.

DDC/CI DDC/CI (Disp

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.

lay Data Channel/Command Interface)

52  │  Operating the 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.

Service Tag Displays the service tag of your monitor. This string is

r

equired when you look for phone support, check
your warranty status, update drivers on Del l's
website, etc.

Reset Others Resets all settings under the Other

s menu to the

factory preset values.

Factory Reset Restore al l preset values to the factory default

se

ttings. These are also the settings for ENERGY

®

tests.

AR

ST

Operating the monitor  │  53

OSD warning message

When the monitor does not support a particular resolution mode, you will see the
following message:

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 2560 x 1440.

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:

You will see the following message before the Lock function is activated:

NOTE: The message may be slightly different according to the selected
settings.

54  │  Operating the monitor

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.

The OSD functions only in the normal operatio
than the power button during the Standby mode, the following message will appear
depending on the selected input:

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 HDMI or DisplayPort input is sele
connected, a floating dialog box as shown below appears.

n mode. If you press any button other

cted and the corresponding cable is not

NOTE: The message may be slightly different according to the
connected input signal.

Operating the monitor  │  55

When Factory Reset is selected, the following message appears:

See Tro ub l es ho otin g for more information.

Setting the maximum resolution

To set the maximum resolution for the monitor:

In Windows

1. F

2. R

3. C

4. Cl

In Windows

1. R

2. Cl

3. C

4. Cl

If you do not see 2560 x 1440 as an option, you may need to update your graphics
driver. D

If you have a Dell desktop or portable computer:

•Go to https://www.dell.com/support, enter your service tag, and download

If you are using a non-Dell computer (portable or desktop):

• Go to the support site for your computer and download the latest graphic

• Go to your graphics card website and download the latest graphic drivers.

®

7, Windows® 8, and Windows® 8.1:

or Windows® 8 and Windows® 8.1 only, select the Desktop tile to switch to

classic desktop.

ight-click on the desktop and click Screen Resolution.

lick the dropdown list of the Screen Resolution and select 2560 x 1440.

ick OK.

®

10:

ight-click on the desktop and click Display settings.

ick Advanced display settings.

lick the dropdown list of Resolution and select 2560 x 1440.

ick Apply.

epending on your computer, complete one of the following procedures:

the latest driver for your graphics card.

ers.

driv

56  │  Operating the monitor

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.

With the stand attached to the monitor, you
comfortable viewing angle.

Ti l t

S2721D S2721DS

can adjust the monitor for the most

NOTE: The stand is not installed at the factory when shipped.

Swivel (S2721DS only)

Operating the monitor  │  57

Vertical extension (S2721DS only)

NOTE: The stand extends vertically up to 110 mm. The figure below
illustrates how to extend the stand vertically.

Rotating the display (S2721DS only)

Before you rotate the display, ensure it is completely extended vertically and
completely tilted up to avoid hitting the bottom edge of the monitor.

58  │  Operating the monitor

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.del l.com/support and see the Download section for Video
Drivers for latest driver updates.

NOTE: In the Portrait mode, you may experience performance
degradation when using graphic-intensive applications such as 3D
gaming.

Operating the monitor  │  59

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
for your graphics card.

www.del l.com/support and download the latest driver

60  │  Operating the monitor

Troubleshooting

WARNING: Before you begin any of the procedures in this section,
fol low the Safety instructions.

Sel 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:

urn Off both your computer and the monitor.

1. T

2. Unp

lug the video cable from the computer.

3. Tu

rn O n t he m o n ito r.

The floating dialog box should appear on-screen (against a black background), if the
mon

itor 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

4. This box also appears during normal system operation, if the video cable
becomes disconnected or damaged.

Tro ub l e sh o ot in g  │  61

5. Turn Off your monitor and reconnect the video cable; then turn On both your

computer and the monitor.

If your monitor screen remains blank after you use the previous procedure, check
your video controller and computer, because your monitor is functioning properly.

Built-in diagnostics

Your monitor has a built-in diagnostic tool that helps you determine if the screen
abnormality you are experiencing is an inherent problem with your monitor, or with
your computer and video card.

To run the built-in diagnostics:

1. Ensur

2. Pr

e that the screen is clean (no dust particles on the surface of the

screen).

ess and hold Button 4 for about 4 seconds until a pop menu appears.

3. Use But
to confirm. A gray test pattern appears at the beginning of the diagnostic

pr

4. Car

5. Pr

6. R

and text screens.

7. Pr

62  │  Tro ub l e sh o ot in g

ton 1 or Button 2 to select the diagnostic tool and use Button 3

ogram.

efully inspect the screen for abnormalities.

ess Button 1 again to change the test patterns.

epeat steps 4 and 5 to inspect the display in red, green, blue, black, white,

ess Button 1 to end the diagnostic program.

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 Picture is fuzzy,

Shaky/Jittery
Video

What you

experience

No picture • Ensure that the video cable

No picture or no
brightness

blurry, or ghosting

Wavy picture or
fine movement

Possible solutions

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

• Increase brightness & contrast
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

• Eliminate video extension cables.

• Reset the monitor to factory settings.

• Change the video resolution to the
correct aspect ratio.

• Reset the monitor to factory settings.

• Check environmental factors.

• Relocate the monitor and test in
another room.

Input Source menu.

Input Source menu.

Tro ub l es hoot in g  │  63

Missing Pixels LCD screen has

spots

Stuck-on Pixels LCD screen has

bright spots

Brightness
Problems

Geometric
Distortion

Horizontal/
Vertical Lines

Picture too dim or
too bright

Screen not
centered correctly

Screen has one or
more lines

•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:

pixelguidelines.

•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:

pixelguidelines.

• Reset the monitor to factory settings.

• Adjust brightness & contrast controls
via OSD.

• Reset the monitor to factory settings.

• Adjust horizontal & vertical controls
via OSD.

• When using HDMI/DisplayPort input,
the positioning adjustments are not
available.

• Reset the monitor to factory settings.

• Perform monitor self-test feature
check and determine if these lines are
also in sel f-test mode.

• Check for bent or broken pins in the
video cable connector.

• Run the built-in diagnostics.

www.del l.com/

www.del l.com/

64  │  Tro ub l e sh o ot in g

Synchronization
Problems

Safety Related
Issues

Intermittent
Problems

Missing Color Picture missing

Wrong Col or Picture color not

Screen is
scrambled or
appears torn

Visible signs of
smoke or sparks

Monitor
mal functions on &
off

color

good

• 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.

• Do not perform any troubleshooting
steps.

•Contact Dell immediately.

• Ensure that the video cable
connecting the monitor to the
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.

• 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.

• Change the settings of the Preset
Modes in the Color menu OSD
depending on the application.

• Adjust R/G/B value under Custom
Color in the Color menu OSD.

• Run the built-in diagnostics.

Tro ub l es hoot in g  │  65

Image retention
fr

om a static
image left on the
monitor for a long
period of time

Faint shadow

rom the static

f
image displayed
appears on the
screen

Product specific problems

•Use the Power Management feature
o turn Off the monitor at all times

t
when not in use (for more information,
see Power management modes).

• Alternatively, use a dynamically

changing s

creensaver.

Common

symptoms

Screen image is too
sma

ll

Cannot adjust the

or with the

monit
buttons on the
front panel

No Input Signal

en user controls

wh
are pressed

The picture does
no

t fill the entire

screen

What you

experience

Image is centered
on screen, but
does not fill entire
viewing area

OSD does not

ar on the

appe
screen

No picture, the
LED light is white

The picture cannot
fill the height or
width of the screen

Possible solutions

•Check the As
Display menu OSD.

• Reset the monitor to factory settings.

• Turn Off the monitor, unplug the power
cord, plug it back, and then turn On
the monitor.

• The OSD menu may be locked. Press
and ho
next to the Power button for 4
seconds to unlock (for more
information, see Lock).

• Check the signal source. Ensure the
computer is not in the power saving
mode by moving the mouse or pressing
any key on the keyboard.

• Check whether the signal cable is

lugged in properly. Re-plug the signal

p
cable if necessary.

• Reset the computer or video player.

• Due to different video formats (aspect
ratio) of DVDs, the monitor may display
in full screen.

• Run the built-in diagnostics.

pect Ratio setting in the

ld the Menu/function button

66  │  Tro ub l es hoot in g

Speakers Specific Problems

Common

symptoms

No sound coming
fr

om the speakers

What you

experience

Cannot hear any
sound

Possible solutions

• Turn Off the monitor, unplug the
monitor power cord, replug it, and then
turn On the monitor.

• Check the audio cable connection is

nnected correctly to the audio line-

co
out port of the computer.

• Unplug the audio cable from the audio

ne-out port.

li

• Reset the monitor to factory settings.

Tro ub l es hoot in g  │  67

Appendix

WARNING: 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.

For information on safety instructions, see Safety, Environmental, and Regulatory
Information (SERI).

FCC notices (U.S. only) and other regulatory information

For FCC notices and other regulatory information, see the regulatory compliance
website located at

Contact Del l

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.del l.com/contactdell

www.dell.com/regulatory_compliance.

68  │  Appendix