Dell U2723QE Service Manual Download Page 24

Page: 24 / 26

. Trouble Shooting Instructions

Problem

What you
experience

Possible solutions

U3023E
connected as
2

monitor

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

Two monitors
connected in
Daisy chain, 1

monitor(non-
DSC) and
2

monitor

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

•

Connect U3023E as 1

Monitor

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

•

Intel Graphic card driver limitation

monitor

(Non DSC)
connected
2

monitor

U3023E (DSC)
cannot reach
native resolution
for 2

monitor

(Non DSC)
connected
2

monitor

U3023E (DSC)
cannot reach
native resolution
for 2

monitor

•

Intel Graphic card driver limitation

•

Connect U3023E as 1

Monitor

Ethernet not
working

Ethernet not
connected

•

Install Ethernet Driver 10.45.20.

Summary of Contents for U2723QE

Page 1: ...Version 01 Date 2021 11 30 Service Manual U2723QE U3023E U3223QE ...

Page 2: ...ipment 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 awa...

Page 3: ... 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 1 See NOTE See NOTE See NOTE 8 11 12 13 10 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 bot...

Page 4: ... 1 USB3 0 Down 4 LOUT 1 KB1 KB2 HDR400 Interface Board USB board 2 n w o D 0 3 B S U t u o 2 1 P D 1 C e p y T n I 4 1 P D n I 4 1 I M D H AC In Power BD LED Driver BD Panel 2560 1600 USBC Down5 USB3 0 Down4 RJ45 USB3 0 Down3 Type C2 USB3 0 Down1 Line out Interface Board USB board LED board Joystick board HDMI DP1 USBC1 DP2 Line out USBC2 USB1 USB2 USB3 USB4 LAN1 HDMI DP1 USBC1 DP2 Line out USBC2 ...

Page 5: ...sconnect 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 ...

Page 6: ...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 ...

Page 7: ...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 ...

Page 8: ...sms of rear cover Use a Philips head screwdriver to remove 4pcs screws for unlocking mechanisms Remove DP caps No 1 4 screw size M4x11 Torque 11 1kgfxcm 3 2 1 2 2 3 4 1 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 Lift the rear cover up carefully Disconnect the joystick ...

Page 9: ...middle bezel and then put it on a cushion foam for later disassembling S12 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 Disconnect the two panel lamp cables from the connectors of the panel Disconnect the LED cable from the connector of the in...

Page 10: ...rque 7 1kgfxcm S16 Remove the power board board and interface board from the disconnect all of the cables bracket chassis module carefully and then Release the panel lamp cables from the hooks of the bracket then remove the Mylar tape from the hooks of the bracket S15 S17 Take away the bracket chassis module and then put the bracket chassis module on a protective cushion S14 1 3 4 2 6 8 7 5 ...

Page 11: ... 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 S3 Panel preparation Take out 1pcs panel module from the carton remove the protective film by ...

Page 12: ...n paste 1pcs mylar tape to cover the LED board as the picture below shown 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 S11 4 1 1 1 Connect the panel lamp cable to the connector of the panel module Connect the LED cable to the connector of the interface board Tear off the release paper of the adhesive tape on t...

Page 13: ...ve 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 S16 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 t...

Page 14: ...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 S18 S19 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...

Page 15: ...rking 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 Cab...

Page 16: ...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 ste...

Page 17: ... 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 Missing Pixels LCD screen has spots 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 pixelgui...

Page 18: ...r to the computer is connected properly and is secure Check for bent or broken pins in the video cable connector Wrong Color Picture color not good Try different 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 Image retention from a static image left on th...

Page 19: ...ower 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 different video formats aspect ratio of DVDs the monitor may display in full screen R...

Page 20: ... 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 Intermittent charging when using USB C connection to computer laptop and so on Intermittent charging Check if the maximum power consumption of device is over 90 W Ensure that you use only Dell approved...

Page 21: ... cable if the LED is not lit First power off 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 U3023E cannot set to 2560 x 1600 60Hz in Daisy chain mode in DP1 2 DSC Disable 2nd monitor displayed image cannot set at 2560 x 1600 60Hz when set MST On and USB C Prioritization High Data Speed Switch USB C P...

Page 22: ...2nd monitor U3023E no displayed image when 1st monitor non DSC connected to Discrete Graphic Card E g Nvidia with 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 Connect U3023E as 1st Monitor U3023E as 2nd monitor cannot display 2560 x 1600 image when 1st monitor non DSC connected to Intel Graphic Card ...

Page 23: ...ync MMS turn off 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 the 2nd or 3rd monitors may not work on DDM Set Multi Monitor Sync MMS turn off Or adjust Brightness contrast through OSD U3023E as 2nd monitor no displayed image when 1st monitor with USB C cable connected to Nvidia Graphic Card DSC Enable wi...

Page 24: ... 1st Monitor 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 Intel Graphic card driver limitation 1st monitor Non DSC connected 2nd monitor U3023E DSC cannot reach native resolution for 2nd monitor 1st monitor Non DSC connected 2nd monitor U3023E DSC cannot reach native ...

Page 25: ...in MST mode DSC disable and High Data Speed encountered hang five minutes issue Three monitors connected in Daisy chain 1st monitor connect USB C cable with platform and 2nd and 3rd 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 Connect 2 U3023E monitor at DSC disable a...

Page 26: ...at all 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 Wireless USB peripherals stop working when a USB 3 0 device is plugged in Wireless USB peripherals responding slowly or only working as t...

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