Dell S2719DC Instructions for use

Product Announcement:
This product is certificated to meet RoHS
Directive and Lead-Free produced definition.
Using approved critical components only is
recommended when the situation to replace
defective parts. Vender assumes no liability
express or implied, arising out of any unauthorized
modification of design or replacing non-RoHS
parts. Service providers assume all liability.
Qualified Repairability:
Proper service and repair is important to the safe,
reliable operation of all series products. The
service providers recommended by vender should
be aware of notices listed in this service manual in
order to minimize the risk of personal injury when
perform service procedures. Furthermore, the
possible existed improper repairing method may
damage equipment or products. It is recommended
that service engineers should have repairing
knowledge, experience, as well as appropriate
product training per new model before performing
the service procedures.
NOTICE:
! To avoid electrical shocks, the products should be
connected to an authorized power cord, and turn
off the master power switch each time before
removing the AC power cord.
! To prevent the product away from water or
expose in extremely high humility environment.
! To ensure the continued reliability of this
product, use only original manufacturer’s
specified parts.
! To ensure following safety repairing behavior, put
the replaced part on the components side of
PWBA, not solder side.
! To ensure using a proper screwdriver, follow the
torque and force listed in assembly and
disassembly procedures to unscrew screws.
! Using Lead-Free solder to well mounted the
parts.
! The fusion point of Lead-Free solder requested in
the degree of 220°C.
1. Important Safety Notice

2. Exploded view diagram with list of items

3. Wiring Connectivity Diagram
SDC Panel 27" 2560*1440
FK BD
Line Out
USB-C
HDMI1
DC IN
LVDS Signal BL Power
Main Board

4. Disassembly and Assembly Procedures
4.1 Disassembly Procedures:
S1
Wedge your fingers between the rear cover and the
middle bezel on the corners of the top side of the
monitor to release the rear cover, then use one hand
to press the middle bezel, the other hand to pull up
carefully the rear cover in order of arrow preference
for unlocking mechanisms of rear cover..
Put the monitor on a protective cushion. Lift up the
stand , then use a Philips-head screwdriver to remove
2pcs screws for unlocking the whole unit including
stand and base, then remove the stand and base. Use
a Philips-head screwdriver to remove 2pcs screws for
release the hinge cover.
(No.1~2 screw size=M3x11, Torque=7.5±0.5kgfxcm;
No.3~4 screw size=M2x0.4x3.2, Torque=2~3kgfxcm)
1
2
4
3
S2
1
3
2
3
Tear off 2pcs double-faced tapes on the left and right
side of the middle bezel, then tear off 2pcs aluminum
foil to release the panel lamp cable and LVDS
connector.
S3
Use a Philips-head screwdriver to remove 2pcs
screws for unlocking the front bezel with the panel
module, and then use a proper tool to disconnect the
panel lamp cable, LVDS cable and function key
board from the connector of the main board.
(No.1~2 screw size=M1.6x2.2, Torque=0.5±0.1kgfxcm)
2
1
S4
Necessary repair and test equipment:
1. Philips-head screwdriver

4. Disassembly and Assembly Procedures
Use a Philips-head screwdriver to remove 4pcs
screws for unlocking bracket, move away the bracket
and then remove 1pcs screw for removing the front
bezel carefully.
(No.1~5 screw size=M3x4, Torque=3±0.5kgfxcm)
Use a Philips-head screwdriver to remove 3pcs
screws for unlocking bracket with panel module.
(No.1~3 screw size=M3x2.8, Torque=3±0.5kgfxcm)
13
2
S5
S6
Put the front bezel with function key board into a
fixture, tear off the mylar, then use a Philips-head
screwdriver to remove 3pcs screws for unlocking the
function key board with front bezel.
(No.1~3 screw size=M0.2x2.4, Torque=1±0.2kgfxcm)
S7
321
5234
1
Put the bracket chassis on a protector cushion, then
use a Philips-head screwdriver to remove 4pcs
screws for unlocking the hinge.
(No.1~4 screw size=M3x5.3, Torque=7.5±0.5kgfxcm)
Disconnect the panel lamp cable from the connector
os the panel module, then remove bracket and put it
on a protect cushion for later disassembling. Unplug
the LVDS cable and panel lamp cable from the
connectors of panel module. Tear off the mylar tape
which is sticked on the specific position of the back of
panel, and then use a Philips-head screwdriver to
remove 3pcs screws for unlocking the panel module.
(No.1~3 screw size=M3x2.7, Torque=3~4kgfxcm)
S8
3
1
2
S9
1
3
4
2

4. Disassembly and Assembly Procedures
Turn over the bracket chassis module. Use a Philips-
head screwdriver to remove 5pcs screws for
unlocking the main board.
(No.1~3 screw size=M3x7.5, Torque=7.5±0.5kgfxcm)
S10
Remove the main board from the
disconnect all
of the cables.
bracket chassis
module by taking out the panel lamp cable from the
hole of the bracket carefully, and then
S11
24
1
3
5

4. Disassembly and Assembly Procedures
Take a main board and then stick 1pcs Absorption of
foil on the specific position, and connect 1pcs lamp
cable to the connector of the main board, then turn
over the main board and through the lamp cable into
the hole of the bracket, then put the main board into
the bracket chassis. Use a Philips-head screwdriver
to tighten 5pcs screws for locking the main board.
(No.1~5 screw size=M3x7.5, Torque=7~8kgfxcm)
Place a bracket chassis base on a protective
cushion, then stick 2pcs T-PAD on the specific
position of the bracket as the picture below shown.
4.2 Monitor Assembly Procedures:
S2
S1
S3
Stick 1pcs mylar tape on the correct position and then
use a Philips-head screwdriver to tighten 3pcs screws
for locking the panel module, then connect 1pcs LVDS
and 1pcs panel lamp cable into the connectors. Stick
2pcs double-faced tapes on the specific position of the
panel module as the picture below shown.
(No.1~3 screw size=M3x2.7, Torque=3~4kgfxcm)
S5
Panel preparation: Examine the panel surface
according to inspection criteria. Turn over the panel
to place screen faced down on the protective cushion.
S4
Turn over the bracket chassis base and take a Hinge
put on it. Then use a Philips-head screwdriver to
tighten 4pcs screws for locking the Hinge.
(No.1~4 screw size=M3x5.3, Torque=7~8kgfxcm)
24
1
3
5
3
1
2
Absorption of foil
1
3
4
2

4. Disassembly and Assembly Procedures
Put the bracket chassis module on the back of panel
module, then connect the panel lamp power to the
connector of the panel module. Stick 2pcs conductive
on the specific position of the panel.
S6
Move the front bezel with function key board close to
the panel module, lift up the panel and assemble
front bezel unit with the panel module. Use a Philips-
head screwdriver to tighten 1pcs screw for locking
front bezel with panel module.
(No.1 screw size=M3x4, Torque=3±0.5kgfxcm)
S8
Take 1pcs front bezel, 1pcs power key lens, 1pcs
function key lens, assemble the power key lens and
function key lens to the correct positions of the front
bezel. Take 1pcs function key board, assemble the
function key board with the front bezel to through the
hole of the front bezel. Take a fixture to locate the
front bezel with the function key board, then use a
Philips-head screwdriver to tighten 3pcs screws for
locking the function key board with front bezel, then
stick a mylar tape to cover the function key board.
(No.1~3 screw size=M0.2x2.4, Torque=1±0.2kgfxcm)
S7
Use a Philips-head screwdriver to tighten 3pcs
screws for locking bracket with panel module, then
use a proper tool to connect the LVDS cable, panel
lamp cable and function key cable to the connectors
of the main board.
(No.1~3 screw size=M3x2.8, Torque=3±0.5kgfxcm)
S9
32 1
5234
13
2
1
Adjust the bracket to make it with the panel module
firmly attachment. Use a Philips-head screwdriver to
tighten 4pcs screws for locking bracket with front
bezel and panel module.
(No.2~5 screw size=M3x4, Torque=3±0.5kgfxcm)
S10

4. Disassembly and Assembly Procedures
Take a hinge cover to assemble it with the hinge, then
use a Philips-head screwdriver to tighten 2pcs screws
for locking the hinge cover with the hinge. Take a
stand to assemble with the hinge, then use a Philips-
head screwdriver to tighten 2pcs screws for locking
the stand with the hinge.
(No.1~2 screw size=M2x0.4x3.2, Torque=2~3kgfxcm;
No.3~4 screw size=M3x11, Torque=7.5±0.5kgfxcm)
S14
Use a Philips-head screwdriver to tighten 2pcs screws
for locking the front bezel with the panel module.
(No.1~2 screw size=M1.6x2.2, Torque=0.5±0.1kgfxcm)
S11
Stick 1pcs aluminum foil to cover the LVDS
connector, then stick 1pcs aluminum foil on the
specific position to fix the bracket chassis module.
Tear off 2pcs protective papers of double-faced tapes
on the left-top and right-top of the middle bezel as the
picture below shown.
S12
34
Take a rear cover, tear off the gum on the inside of
the rear cover, put down the rear cover on the
assembled unit carefully and push the rear cover on
the positions marked for two parts engagement.
S13
12
1
2
1
2
3
Take a base to assemble it with stand, then use a
Philips-head screwdriver to tighten 3pcs screws for
locking the stand with base. Take 1pcs decoration
strip, tear off the adhesive paper and stick it on the
correct position as the picture below shown.
(No.1~3 screw size=M4x8, Torque=11±0.5kgfxcm)
S15

Lift up the monitor to checking the gap, then provide
power supply and a video signal to the monitor , then
turn on the monitor for functionality check.
S16
4. Disassembly and Assembly Procedures

5. Trouble Shooting Instructions
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 enables you to check whether your monitor is
functioning properly. If your monitor and computer are properly connected but the monitor
screen remains dark, run the monitor self-test by performing the following steps:
1 Turn o both your computer and the monitor.
2 Unplug the video cable from the back of the computer. To ensure proper Self-Test
operation, remove all digital and analog cables from the back of computer.
3 Turn on the monitor.
The floating dialog box should appear on-screen (against a black background), if the
monitor is working correctly but does not detect a video signal. While in self-test
mode, the power LED remains white. Depending upon the selected input, one
of the dialog box is displayed and will continuously scroll through the screen.
The display will go into Standby Mode in 4 minutes.
www.dell.com/S2719DC
Dell 27 Monitor
S2719DC
No USB Type-C Cable
or
The display will go into Standby Mode in 4 minutes.
www.dell.com/S2719DC
Dell 27 Monitor
S2719DC
No HDMI Cable
4 This box also appears during normal system operation, if the video cable becomes
disconnected or damaged.
5 Turn o 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.

5. Trouble Shooting Instructions
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.
NOTE: You can run the built-in diagnostics only when the video cable is unplugged
and the monitor is in self-test mode.
To run the built-in diagnostics:
1 Ensure that the screen is clean (no dust particles on the surface of the screen).
2 Disconnect the video cable(s) from the back of the computer or monitor. The monitor
then goes into the self-test mode.
3 Press and hold Button 1 for 5 seconds. A gray screen appears.
4 Carefully inspect the screen for abnormalities.
5 Press Button 1 on the front panel again. The color of the screen changes to red.
6 Inspect the display for any abnormalities.
7 Repeat steps 5 and 6 to inspect the display in green, blue, black, white, and text
screens.
The test is complete when the text screen appears. To exit, press Button 1 again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the
monitor is functioning properly. Check the video card and computer.
Recovery mode for HDMI
Your monitor provides an HDMI version recovery failsafe mechanism. HDMI switches to
version 2.0 when one of the Smart HDR modes is selected. If the screen goes blank after
switching to HDMI version 2.0, perform the following steps to revert to HDMI version 1.4:
1 Press any of the menu key to wake up the monitor.
No HDMI signal from your device.
Dell 27 Monitor
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.

5. Trouble Shooting Instructions
2 Press any of the menu key to enter the Input Source select menu.
3 Use and to select the current HDMI port, then press and hold
for 8 seconds to enter the HDMI 1.4 failsafe dialog.
4 Press to enable the HDMI version 1.4.
Dell 27 Monitor
HDMI 1.4 ?
Enable Disable
S2719DC
Common problems
The following table provides general information about common monitor problems you might
encounter and the possible solutions.
Issue Short Possible solutions
description
No Video/Power No picture • Ensure that the video cable connecting the monitor
LED off 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 depressed fully.
• Ensure that the correct input source is selected in
the Input Source menu.
• If current HDMI version is 2.0, switch to 1.4.
No Video/Power No picture or no • Increase brightness and contrast controls through
LED on brightness the OSD.
• Perform monitor self-test feature check.
• Check for bent or broken pins in the video cable
port.
• Run the built-in diagnostics.
• Ensure that the correct input source is selected in
the Input Source menu.

5. Trouble Shooting Instructions
Missing pixels or
Stuck pixels
LCD screen has
spots
• Power cycle. Turn the monitor and the computer
off, and then turn it on again.
• A pixel that is permanently off is a natural defect
that can occur in LCD technology.
• For more information about Dell Monitor Quality
and Pixel Policy, see Dell Support site at:
https://www.dell.com/support/monitors.
Brightness
problems
Picture too dim
or too bright
• Reset the monitor to factory settings.
• Adjust brightness and contrast controls through
OSD.
Safety related
issues
Visible signs of
smoke or sparks
• Do not perform any troubleshooting steps.
• Contact Dell immediately.
Intermittent
problems
Monitor
malfunctions on
and off
• 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.
Issue Short
description
Possible solutions
HDR problems Cannot set GFX
solution into
HDR mode after
switching into
Desktop/Movie
HDR/Game
HDR/Reference
Presets
• Ensure your computer or graphics solution meets
the minimum requirement for HDR playback and
install the latest software drivers for the graphics
card.
• Ensure that the HDMI 2.0 cable that comes with
the package is used.
• If the above steps fail, choose the resolution 3840
x 2160 from the Display Properties to force the
proper HDR signaling.
Missing color Picture missing
color
• Perform monitor self-test.
• 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
port.
Wrong color Picture color
incorrect
• 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 Color
menu OSD.
• Change the Input Color Format to computer RGB
or YPbPr in the Color menu OSD.
• Run the built-in diagnostics.
Image retention
from a static
image left on
the monitor for
a long period of
time
Faint shadow
from the static
image displayed
appears on the
screen
• Set the screen to turn o 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.

5. Trouble Shooting Instructions
Product specific problems
Problem What you
experience
Possible solutions
Screen image is
too small
Image is
centered on
screen, but does
not fill entire
viewing area
• Check the Aspect Ratio setting in the Display
menu OSD.
• Reset the monitor to factory settings.
Cannot adjust
the monitor with
the buttons on
the front panel
OSD does not
appear on the
screen
• Turn o the monitor, unplug the monitor power
cable, plug it back, and then turn on the monitor.
No Input Signal
when user
controls are
pressed
No picture, the
LED light is white
• Check the signal source. Ensure that 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 plugged in
properly. Connect the signal cable again, if
necessary.
• Reset the computer or video player.
The picture does
not fill the entire
screen
The picture
cannot fill the
height or width
of the screen
• Due to dierent video formats (aspect ratio) of
DVDs, the monitor may display in full screen.
• Run the built-in diagnostics.
No image
when using
USB Type-C
connection
to computer,
laptop, and so on
Black screen • Verify if the USB Type-C interface of the device can
support DP alternate mode.
• Verify if the device required more than 45 W power
charging.
• USB Type-C interface of device cannot support DP
alternate mode.
• Set Windows to Projection mode.
• Ensure that the USB Type-C cable is not damaged.
No charging
when using
USB Type-C
connection
to computer,
laptop, and so on
No charging • Verify if the device can support one of 5 V/9 V/15
V/20 V charging proles.
• Verify if the device requires more than 45 W power
charging.
• Ensure that you use only Dell approved adapter or
the adapter that comes with the product.
• Ensure that the USB Type-C cable is not damaged.
Intermittent
charging
when using
USB Type-C
connection to
computer,laptop,
and so on
Intermittent
charging
• Check if the maximum power consumption of
device is over 45 W.
• Ensure that you use only Dell approved adapter or
the adapter that comes with the product.
• Ensure that the USB Type-C cable is not damaged.