Dell U3023E User manual

Service Manual - U2723QE/U3023E/U3223QE

Version: 01

Date: 2021/11/30

Product Announcement:

1. Important Safety Notice

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

! 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.

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.

2. Exploded view diagram with list of items

1

8

2

10

3

4

11

5 6

12

7

13

Item Description Q'ty Remark

1
2

4 1

Panel
ASSY Middle Frame
PCBA USB BD
PCBA Power BD
PCBA Interface BD

1
1
13

For EMEA Only, not for

15

other regions

6 ASSY Main Chassis 1

ASSY Rear Cover

8 1

11

12

ASSY Stand Base

Power cable

DisplayPort 1.8 M cable

USB-C Gen2 PD3.0 cable (U3023E only)

USB-C Gen2 1.0 M cable (A to C) (U3023E only)
USB-C 1.0 M cable (A to C) (U2723QE/U3223QE only)

USB-C 1.0 M cable (C to C) (U2723QE/U3223QE only)

1 7

1

9

1

10

1

1
1 13

1 14

See “NOTE”
See “NOTE”

See “NOTE”
See “NOTE”
See “NOTE”
See “NOTE”

8

14

NOTE:

For replacement of power cord, connectivity cable and external power supply (if applicable), contact Dell:

1. Go to https://www.dell.com/support.

2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page.

3. Click Contact Us next to the country dropdown.

4. Select the appropriate service or support link based on your need.

5. Choose the method of contacting Dell that is convenient for you.

U2723QE&U3223QE

3. Wiring Connectivity Diagram

Panel 3840*2160

HDR400

KB1

KB2

Joystic BD

LED BD

Power BD

U3023E

AC In

Interface Board

HDMI2.0 In DP1.4 In Type-C1 DP1.4 out USB3.0

HDMI DP1 USBC1 DP2 Line-out USBC2 USB1 USB2 USB3 USB4 LAN1

Panel 2560*1600

LED
Driver
BD

LOUT 1

Type-C2 USB3.0

USB3.0
Down 1

Down 2

Down 3

USB3.0
Down 4

RJ45

USB board

USBC

USB3.0

Down 6

Down 5

Power BD

HDMI DP1

Interface Board

USB3.0 Down3Type-C2 USB3.0 Down1Line-out

2nwoD 0.3BSUtuo 2.1PD1 C epyTnI 4.1PDnI 4.1IMDHAC In

USBC1 DP2 Line-out USBC2 USB1 USB2 USB3 LAN1

RJ45

Joystick board

LED board

USB board

USBC

USB3.0

Down5

Down4

4. How to connect and disconnect power cable/ connectivity cable

WARNING: To change power cable/ connectivity cable, switch off power before unplugging the cable and replugging in required

cable.

Connecting the HDMI Cable (optional)

Connecting the DP Cable

4. How to connect and disconnect power cable/ connectivity cable

Connecting the monitor for DP Multi-Stream Transport (MST) function

Connecting the USB-C Cable (A to C)

Connecting the USB-C Cable (C to C)

4. How to connect and disconnect power cable/ connectivity cable

Connecting the Monitor for USB-C Multi-Stream Transport (MST) Function

Connecting the Monitor for RJ45 Cable (optional)

5. Disassembly and Assembly Procedures

NOTE:

This “Disassembly and Assembly Procedures” is for EMEA only,
not for other regions. Please note that Dell will deem warranty void
if any disassembly is done on the monitors.

Tool Required:

List the type and size of the tools that would typically can be
used to disassemble the product to a point where components
and materials requiring selective treatment can be removed.

Tool Description:

- Screwdriver(Phillip head) #1

- Screwdriver(Phillip head) #2

- Penknife

- Soldering iron and absorber

4.1 Disassembly Procedures(U3223QE for example):

Remove the monitor stand base:

S1

S1

1. Place the monitor on a soft cloth or cushion.

2. Press and hold the stand-release button.

3. Lift the stand up and away from the monitor.

S4

S5

Lift the rear cover up carefully. Disconnect the

joystick key cable from the connector of the interface

board, and then remove the rear cover and put it

aside for later disassembling.

Use a Philips-head screwdriver to remove 2pcs

screw for unlocking the key board, then tear off the

tapes and release the key board.

(No.1~2 screw size=M2x2.4, Torque=0.8~1kgfxcm)

S2

S3

Use a Philips-head screwdriver to remove 4pcs

screws for unlocking mechanisms. Remove DP caps.

(No.1~4 screw size=M4x11; Torque=11± 1kgfxcm)

2

4

Wedge your fingers between 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.

3

1

S6

S7

1

2

Tear off 1pcs aluminum foil for unfixing the bracket,

then tear off 1pcs acetate tape for uncovering the

LVDS connector .

Use a Philips-head screwdriver to release one screw

for unlocking the USB board, and disconnect the two

cables, then release the USB board from the hooks

of the middle bezel.

(No.1screw size=M3x6, Torque=4±0.5kgfxcm)

1

2

3

2

1

5. Disassembly and Assembly Procedures

S8

S9

Use a Philips-head screwdriver to remove

18(13+5)pcs screws for unlocking the middle bezel

with the panel module.

(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm;

No.13~18 screw size=M3x4.5, Torque=5±0.5kgfxcm)

7

5 8 9

11

2

10

15 17

14

61

4

13

3

12

18

16

Disconnect the two panel lamp cables from the

connectors of the panel. Disconnect the LED cable

from the connector of the interface board.

S11

S12

Lift up the middle bezel, and then put it on a cushion

foam for later disassembling.

Tear off the tape on the middle bezel for releasing the

LED cable, and then tear off the mylar tape to release

the LED board for the hooks of the middle bezel.

S10

U.se a Philips-head screwdriver to remove 4pcs

screws for unlocking the bracket chassis module

with the panel

(No.1~4 Screw size= M3x5, Torque=5±0.5kgfxcm)

3

2

1

4

S13

Move up the bracket, then push the earing-lock and

disconnect the LVDS cable away from the connectors

of the panel module.

5. Disassembly and Assembly Procedures

S14

S15

Take away the bracket chassis module and then put

the bracket chassis module on a protective cushion.

Release the panel lamp cables from the hooks of the

bracket, then remove the Mylar tape from the hooks

of the bracket.

S17

Remove the power board board and interface

board from the

and then

bracket chassis module carefully,

disconnect all of the cables.

S16

Use a Philips-head screwdriver to remove

8pcs

screws for interface board and power board.

(No.1 screw size=M4x8, Torque=7±1kgfxcm;

No.2~8 screw size=M3x7.5, Torque=7±1kgfxcm)

6

3

8

7

1

2

4

5

5. Disassembly and Assembly Procedures

5.1 Assembly Procedures:
Place a bracket chassis base on a protective

S1

S2

cushion, then stick 4pcs Silicon sheets on the

positions as the picture below shown.

Take a power board and put the power board into

the bracket chassis, settle the cable to the correct

position.

S4

S5

Take a black mylar to insert the hooks of the bracket

to cover the power board, then tear off the gum

paper of the panel lamp cable and locate the cable

into the hook of the bracket..

Panel preparation: Take out 1pcs panel module from

the carton, remove the protective film by tearing off

the tapes, then examine the panel surface according

to inspection criteria of the panel. Turn over the

panel module to place the screen faced down for

later assembling.

S3

Take a interface board, connect 1pcs LVDS cable and

1pcs panel lamp cable to the connectors of the

interface board, then connect the cable of the power

board with interface board. Turn over the interface

board and locate it to the bracket. Use a Philips-head

screwdriver to tighten 7pcs screws for locking the

interface board and power board.

(No.1 screw size=M4x8, Torque=7.5±0.5kgfxcm;

No.2~7 screw size=M4x8, Torque=7.5±0.5kgfxcm)

6

5

3

2

S6

Move the bracket chassis module close to the panel

module, then connect the LVDS cable to the

connector of the panel module, then turn over the

bracket chassis and put it on the back of the bracket

chassis module.

7

1

4

5. Disassembly and Assembly Procedures

Adjust the bracket chassis module, and then u.se a

Philips-head screwdriver to tighten 4pcs screws for

S7

locking the bracket chassis module with the panel

(No.1~4 Screw size= M3x5, Torque=5±0.5kgfxcm)

1

1

S9

S10

Move the middle bezel with the LED board close to

the panel unit, then assemble the middle bezel with

the front bezel and panel module.

Tear off the release paper of the adhesive tape on

the back of the LED cable, then settle and fix the

LED cable on the back of the panel module.

S8

1

4

Take 1pcs LED key board and 1pcs middle bezel,

then put the middle bezel into a fixture jip to fix the

middle bezel. Tear off the gum on the back of the

board, and then paste the LED board on the correct

position of the middle bezel, then paste 1pcs mylar

tape to cover the LED board as the picture below

shown.

S11

S12

Connect the panel lamp cable to the connector of

the panel module. Connect the LED cable to the

connector of the interface board.

Use a Philips-head screwdriver to tighten 13pcs

screws for locking the middle bezel with the panel

module.

(No.1~13 screw size=M3x5, Torque=5±0.5kgfxcm)

7

5

2

8

13

12

1

6

4

3

9

11

10

5. Disassembly and Assembly Procedures

S13

Take 1pcs USB board, 2pcs cables and 1pcs

conductive foam. Connect the 2pcs cables to the

connectors of the Usb board, then turn over the

board and paste the conductive foam on the back of

the USB board, and then locate the USB board into

the correct position of the middle bezel. Use a

Philips-head screwdriver to tighten 1pcs screw for

locking the USB unit with the middle bezel, then

connect the two USB cables to the connectors of

interface board.

(No.1 screw size=M3x6, Torque=4±0.5kgfxcm)

S15

Take 1pcs joystick key and 1pcs OSD board,

assemble the joystick key with the OSD board.

Locate the board to the correct position of the rear

cover, then use a Philips-head screwdriver to tighten

2pcs screws for locking the board with rear cover.

Tear off the tape papers on the back of the cable,

and then fix the key cable with tapes.

(No.1~2 screw size=M2x2.4, Torque=0.9±0.1kgfxcm)

S14

1

Paste 1pcs aluminum foil to fix the bracket on the

specific position as the picture below shown.

S16

2

1

Move the assembled rear cover close to the panel

unit, then connect the joystick key cable to the

connector of interface board. Put down the rear

cover and push the rear cover on the positions

marked as the picture below shown for

mechanisms engagement.

S17

5. Disassembly and Assembly Procedures

Use a Philips-head screwdriver to tighten 4pcs

screws for locking the rear cover with the unit. Stick

two pieces of label on the specific positions, then

insert 2pcs DP out Caps into the DP out connectors.

(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)

S18

S19

2

4

Take a stand base close to the monitor. Fit the two

tabs on the upper part of the stand into the grooves,

and then lower the stand so that the monitor

mounting area snaps onto the stand.

Lift up the monitor to check the gap between the

front bezel and the panel, then provide power supply

and a video signal to the monitor , then turn on the

monitor for functionality check.

3

1

6. Trouble Shooting Instructions

Self-Test

Your monitor provides a self-test feature that allows you to check whether your
monitor is functioning properly. If your monitor and computer are properly connected
but the monitor screen remains dark, run the monitor self-test by performing the
following steps:

1. Turn 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 the 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 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.

No DP Cable

The display will go into Standby Mode in 4 minutes.

www.dell.com/U3023E/U2723QE/U3223QE

or

No HDMI Cable

The display will go into Standby Mode in 4 minutes.

www.dell.com/U3023E/U2723QE/U3223QE

or

No USB-C Cable

The display will go into Standby Mode in 4 minutes.

www.dell.com/U3023E/U2723QE/U3223QE

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.

6. 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.

UltraSharp 30/27/32 Monitor

Brightness/Contrast

Input Source

Color

Display

PIP/PBP

USB

Menu

Personalize

Others

Display Info

DDC/CI On

LCD Conditioning

Firmware M3T101

Service Tag CN073K0

Self-Diagnostics Select

Reset Others

Factory Reset

Select

O

ENERGY STAR

®

Exit

To Run the Built-in diagnostics:

1. Ensure that the screen is clean (no dust particles on the surface of the screen).

2. Select OSD items of Self-Diagnostics in Others feature.

3. Press the joystick button to start the diagnostics. A gray screen is displayed.

4. Observe if the screen has any defects or abnormalities.

5. Toggle the joystick once again until a red screen is displayed.

6. Observe if the screen has any defects or abnormalities.

7. Repeat steps 5 and 6 until the screen displays green, blue, black, and white

colors. Note any abnormalities or defects.

The test is complete when a text screen is displayed. To exit, toggle the joystick control
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.

6. Trouble Shooting Instructions

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

Missing Pixels LCD screen has

Stuck-on Pixels LCD screen has

Brightness
Problems

Safety Related
Issues

What you
experience

No picture •Ensure that the video cable connecting the

No picture or no
brightness

spots

bright spots

Picture too dim
or too bright

Visible signs of
smoke or sparks

Possible solutions

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 depressed fully.

•Ensure that the correct input source is selected

in the Input Source menu.

•Increase brightness and 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 Input Source menu.

•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:

https://www.dell.com/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

PixelPolicy, see Dell Support site at:

https://www.dell.com/pixelguidelines.

•Reset the monitor to factory settings.

•Adjust brightness and contrast controls via OSD.

•Do not perform any troubleshooting steps.

•Contact Dell immediately.

6. Trouble Shooting Instructions

Common
symptoms

Intermittent
Problems

Missing Color Picture missing

Wrong Color Picture color

Image retention
from a static
image left on
the monitor for
a long period of
time

What you
experience

Monitor
malfunctions on
& off

color

not good

Faint shadow
from the static
image displayed
appears on the
screen

Possible solutions

•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.

•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.

•Try dierent Preset Modes in Color settings
OSD.

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

•Change the Input Color Format to RGB or
YCbCr in the Color settings OSD.

•Run the built-in diagnostics.

•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.

6. Trouble Shooting Instructions

Product specific problems

Problem What you

experience

Screen image is
too small

Cannot adjust
the monitor
with the
buttons on the
front panel

No Input Signal
when user
controls are
pressed

The picture
does not fill the
entire screen

No image
when using DP
connection to
the PC

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

OSD does not
appear on the
screen

No picture, the
LED light is
white

The picture
cannot fill the
height or width
of the screen

Black screen •Verify which DP standard (DP 1.1a or DP 1.4) is

Possible solutions

•Check the Aspect Ratio setting in the Display
menu OSD.

•Reset the monitor to factory settings.

•Turn o the monitor, unplug the monitor power

cable, plug it back, and then turn on the monitor.

•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 plugged
in properly. Connect the signal cable again, if
necessary.

•Reset the computer or video player.

•Due to dierent video formats (aspect ratio) of

DVDs, the monitor may display in full screen.

•Run the built-in diagnostics.

your Graphics Card certied to. Download and
install the latest graphics card driver.

•Some DP 1.1a graphics card cannot support
DP 1.4 monitors. Go to OSD menu, under Input
Source selection, press and hold DP select
joystick key for 8 seconds to change the monitor
setting from DP 1.4 to DP 1.1a.

6. Trouble Shooting Instructions

Problem What you

experience

No image when

Black screen •Verify if the USB-C interface of the device can
using USB-C
connection
to computer,
laptop, and so
on

No charging

No charging •Verify if the device can support one of 5 V/9 V/
when using
USB-C
connection
to computer,
laptop, and so
on

Intermittent
charging when

Intermittent

charging
using USB-C
connection to
computer,
laptop, and so
on

No image when
using USB-C
MST

No network
connection

Black screen or

nd

DUT is not

2

Prime mode

Network

dropped or

Intermittent

Possible solutions

support DP alternate mode.

•Verify if the device required more than 90 W
power charging.

•USB-C interface of device cannot support DP
alternate mode.

•Set Windows to Projection mode.

•Ensure that the USB-C cable is not damaged.

15 V/20 V charging proles.

•Verify if the Notebook requires a >90 W power
adaptor.

•If the Notebook requires a >90 W power
adaptor, it may not charge with the USB-C
connection.

•Ensure that you use only Dell approved adapter
or the adapter that comes with the product.

•Ensure that the USB-C cable is not damaged.

•Check if the maximum power consumption of

device is over 90 W.

•Ensure that you use only Dell approved adapter
or the adapter that comes with the product.

•Ensure that the USB-C cable is not damaged.

•USB-C input, Go to OSD menu, under Display

Info check the Link Rate is HBR2 or HBR3, if
Link Rate is HBR2, suggest to use USB-C to DP
cable to turn on MST.

•Do not toggle O/On the power button when
network is connected, keeps the power button
On.

6. Trouble Shooting Instructions

Problem What you

experience

The LAN port is
not functioning

OS setting
or cable
connection
issue

nd

U3023E cannot
set to 2560 x
1600 @ 60Hz
in Daisy chain
mode in DP1.2
(DSC Disable)

monitor

2
displayed image
cannot set at
2560 x 1600
@ 60Hz when
set MST On
and USB-C
Prioritization
(High Data
Speed)

rd

3

U3023E
connected as

rd

monitor

3
cannot set to
2560 x 1600 @
60Hz in Daisy
chain mode in
DP1.4 (DSC
Disable)

monitor
displayed image
cannot set at
2560 x 1600
@ 60Hz when
set MST On
and USB-C
Prioritization
(High Data
Speed)

Possible solutions

•Ensure that the latest BIOS and drivers for your
computer are installed on your computer.

•Ensure that the RealTek Gigabit Ethernet
Controller is installed in the Windows Device
Manager.

•If your BIOS Setup has a LAN/GBE Enabled/
Disabled option, make sure it is set to Enabled.

•Ensure that the Ethernet cable is connected
securely on the monitor and the hub/router/
rewall.

•Check the status LED of the Ethernet cable to
conrm connectivity. Re-connect both ends of
the Ethernet cable if the LED is not lit.

•First power o the Computer and unplug the
Type-C cable and power cord of the monitor.
Then, power on the computer, plug in the
monitor power cord and Type-C cable.

•Switch USB-C Prioritization from High Data
Speed to High Resolution. (USB speed reduce
to 2.0)

•Switch PC that supported DP1.4

•Switch USB-C Prioritization from High Data

Speed to High Resolution. (USB speed reduce
to 2.0)

6. Trouble Shooting Instructions

Problem What you

experience

U3023E
connected as

rd

monitors

3
displayed
image at lower
resolution in
DP1.4 (DSC
Enable)

Three U3023E
monitors
connected in
daisy chain,

rd

3

displayed
image at lower
resolution when
set MST On
and USB-C
Prioritization
(High Data
Speed)

nd

monitor

2
(U3023E) no
displayed image
when 1

st

monitor
(non-DSC)
connected
to Discrete
Graphic Card
(E.g Nvidia)
with DSC
Enable

U3023E as 2
monitor cannot
display 2560
x 1600 image
when 1

st

monitor
(non-DSC)
connected to
Intel Graphic
Card with DP1.4
(DSC Enable)

Two monitors
connected in
Daisy chain,
2nd monitor
U3023E no
displayed image
when set MST
On and USB-C
Prioritization
(High Data
Speed)

nd

Two monitors
connected in
Daisy chain,

nd

monitor

2
U3023E cannot
displayed 2560
x 1600 image
when set MST
On and USB-C
Prioritization
(High Data
Speed)

Possible solutions

•Press “Windows” + “P” key, select “second
screen only”

•Goto Display setting, select 2560 x 1600

st

•Connect U3023E as 1

•Connect U3023E as 1

Monitor

st

Monitor

6. Trouble Shooting Instructions

Problem What you

experience

OSD lagging
when navigating
menu

2 or 3 monitors
connected in
daisy chain
when MMS
is On, OSD
lagging during
menu navigation

OSD no
response

2 or 3 monitors
connected in
daisy chain
when MMS is
On, no OSD
response during
menu navigation
response during
menu navigation

Can’t adjust
Brightness/
Contrast
through
Dell Display
Manager
(DDM)

2 or 3 monitors
connected in
daisy chain
when MMS
is On, some
functions of

nd

the 2

or 3rd
monitors may
not work on
DDM

U3023E as

nd

monitor

2
no displayed
image when 1
monitor with
USB-C cable
connected
to Nvidia
Graphic Card
(DSC Enable)
with Salomon

Two monitors
connected in
Daisy chain,

st

2nd monitor
U3023E no
displayed image
when set MST
On and USB-C
Prioritization
(High Data
Speed)

docking

Possible solutions

•Set Multi-Monitor Sync (MMS) turn o

•Or Slow the OSD navigating speed to 1 second

•Set Multi-Monitor Sync (MMS) turn o

•Set Multi-Monitor Sync (MMS) turn o

•Or adjust Brightness/contrast through OSD

•In the BIOS menu set to disable” discrete

graphics controller direct output mode”

•Without docking

6. Trouble Shooting Instructions

Problem What you

experience

U3023E
connected as

nd

monitor

2
cannot set to
2560 x 1600 @
60Hz in Daisy
chain mode in
DP1.4 (DSC
Disable)

Two monitors
connected in
Daisy chain, 1st
monitor(non­DSC) and

nd

monitor

2
U3023E cannot
set to 2560 x
1600 @ 60Hz
when set MST
On and USB-C
Prioritization
(High
Resolution)

3x U3023E
connected in
MST mode
encountered
flicker issue

3x U3023E
connected in
MST mode
encountered
flicker issue for
1 second during
Shutdown,
Reboot,
Unplug/plug,
Sleep & Wakeup

st

monitor

1
(Non DSC)
connected

nd

monitor

2
U3023E (DSC)
cannot reach
native resolution

nd

monitor

for 2
Ethernet not

working

st

1

monitor
(Non DSC)
connected

nd

monitor

2
U3023E (DSC)
cannot reach
native resolution

nd

monitor

for 2
Ethernet not

connected

Possible solutions

•Connect U3023E as 1

st

Monitor

•Intel Graphic card driver limitation

•Intel Graphic card driver limitation

•Connect U3023E as 1

st

Monitor

•Install Ethernet Driver 10.45.20.

6. Trouble Shooting Instructions

Problem What you

experience

3 Soundbar
unit not
working when
connected
to 3 U3023E
monitor

3 soundbars
unit connected
individually
to 3 U3023E
monitor,
soundbar not
working via DP/
HDMI

3x U3023E
connected in
MST mode DSC
disable and High
Data Speed
encountered
hang five
minutes issue

Three monitors
connected in
Daisy chain,

st

monitor

1
connect USB-C
cable with
platform and 2

rd

and 3

monitor
with DP cable
when set MST
On and USB-C
Prioritization
(High Data
Speed) and
DSC Disable
Restart
platform or
unplug and plug
USB-C cable
encounter hang
five minutes
issue

Possible solutions

•USB Topology limitation to 2.

•Connect 2 soundbar unit individually to 2

U3023E monitor

•Connect 2 U3023E monitor at DSC disable and
USB-C Prioritization switch to High Data Speed,
Or

•Connect 3 U3023E monitor at DSC disable and
USB-C Prioritization switch to High Resolution

nd

6. Trouble Shooting Instructions

Universal Serial Bus (USB) specific problems

Specific
symptoms

USB interface is
not working

Super speed
USB 3.2 Gen2
interface is
slow.

Wireless USB
peripherals stop
working when a
USB 3.0 device
is plugged in

USB is not
working

What you
experience

USB peripherals
are not working

Super speed
USB 3.2 Gen2
peripherals
working slowly
or not working
at all

Wireless USB
peripherals
responding
slowly or only
working as
the distance
between itself
and its receiver
decreases

No USB
functionalities

Possible solutions

•Check that your display is turned ON.

•Reconnect the upstream cable to your

computer.

•Reconnect the USB peripherals (downstream
connector).

•Turn o the monitor and turn it on again.

•Reboot the computer.

•Certain USB devices such as portable hard

drives require higher power source; connect the
drive to the computer directly.

•Check that your computer is USB 3.0-capable.

•Some computers have USB 3.0, USB 2.0, and

USB 1.1 ports. Ensure that the correct USB port
is used.

•Reconnect the upstream cable to your
computer.

•Reconnect the USB peripherals (downstream
connector).

•Reboot the computer.

•Increase the distance between the USB 3.0

peripherals and the wireless USB receiver.

•Position your wireless USB receiver as close as
possible to the wireless USB peripherals.

•Use a USB-extender cable to position the
wireless USB receiver as far away as possible
from the USB 3.0 port.

Refer to input source and USB pairing table.