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Dell U4323QE Service Manual
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Dell U4323QE Service Manual

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Service Manual - U4323QE
Version: 01
Date: 2022/07/22

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Summary of Contents for Dell U4323QE

  • Page 1 Service Manual - U4323QE Version: 01 Date: 2022/07/22...
  • Page 2 1. Important Safety Notice Product Announcement: ! To ensure using a proper screwdriver, follow the This product is certificated to meet RoHS torque and force listed in assembly and Directive and Lead-Free produced definition. disassembly procedures to unscrew screws. Using approved critical components only is ! Using Lead-Free solder to well mounted the recommended when the situation to replace parts.
  • Page 3 See “NOTE” 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.
  • Page 4 3. Wiring Connectivity Diagram 43 inch LCD panel LED BD Speaker Interface board USB BD...
  • Page 5 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.
  • Page 6 4. How to connect and disconnect power cable/ connectivity cable...
  • Page 7 This “Disassembly and Assembly Procedures” is for EMEA only, joystick key cable from the connector of the interface not for other regions. Please note that Dell will deem warranty void board, and then remove the rear cover and put it if any disassembly is done on the monitors.
  • Page 8 5. Disassembly and Assembly Procedures Release the speakers’ cable to from the hooks of the middle frame, then remove the speakers. Use a Philips-head screwdriver to remove 4pcs screw for unlocking the USB unit with the middle frame, and then release the USB unit from the hooks Tear off 1pcs aluminum foil to release the bracket of middle frame.
  • Page 9 5. Disassembly and Assembly Procedures Tear off 4pcs rubbers , then use a Philips-head Use a Philips-head screwdriver to remove 9pcs screwdriver to remove 2pcs screws for unlocking the screws for unlocking power board and interface small bracket with T-Con board, then remove the board with the bracket.
  • Page 10 Put 1pcs power board into the bracket, then use a Philips-head screwdriver to tighten 4pcs screws for Take 1pcs Dell nameplate, then use a locating fixture locking the power board. to fix the nameplate to the front bezel of the module, (No.1 screw size=M4x8, Torque=6...
  • Page 11 5. Disassembly and Assembly Procedures Take 1pcs LED board and 1pcs middle frame, and Move the bracket chassis module close to the panel then locate the LED board into the specific position of module, then connect the LVDS cable to the the middle frame Paste 1pcs mylar tape to fix the connector of the T-Con board, then put the bracket LED board with middle frame, then thread the cable...
  • Page 12 5. Disassembly and Assembly Procedures Take 1pcs USB board, 1pcs USB connective cable Locate the right speakers into the provers of the and 1pcs USB bracket. Connect the USB cable to middle frame, then connect the LED cable, USB the connector of the USB board, and then locate the connective cable and speaker’s cable to the USB board into the USB bracket and use a connectors of the board.
  • Page 13 5. Disassembly and Assembly Procedures Move the assembled rear cover close to the Use a protective bag to pack the stand base, then lift panel unit, then connect the joystick key cable to up the monitor to checking the gap between the front the connector of interface board.

  • Page 14: Troubleshooting Instructions

    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/U4323QE No HDMI Cable The display will go into Standby Mode in 4 minutes. www.dell.com/U4323QE No USB-C Cable The display will go into Standby Mode in 4 minutes.

  • Page 15: Built-In Diagnostics

    6. Trouble Shooting Instructions 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.

  • Page 16: Common Problems

    • Cycle power on-o . spots • Pixel that is permanently o 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 Stuck-on Pixels LCD screen has •...
  • Page 17 6. Trouble Shooting Instructions Common What you Possible solutions symptoms experience Intermittent Monitor • Ensure that the video cable connecting the Problems malfunctions on monitor to the computer is connected properly & o and is secure. • Reset the monitor to factory settings. •...
  • Page 18 6. Trouble Shooting Instructions Product speci c problems Problem What you Possible solutions experience Screen image is Image is • Check the Aspect Ratio setting in the Display too small centered on menu OSD. screen, but • Reset the monitor to factory settings. does not ll entire viewing area...
  • Page 19 • If the Notebook requires a >90 W power laptop, and so 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 Intermittent •...
  • Page 20 6. Trouble Shooting Instructions Problem What you Possible solutions experience The LAN port is OS setting • Ensure that the latest BIOS and drivers for your not functioning or cable computer are installed on your computer. connection • Ensure that the RealTek Gigabit Ethernet issue Controller is installed in the Windows Device Manager.
  • Page 21 6. Trouble Shooting Instructions Speci c What you Possible solutions symptoms experience Super speed Super speed • Check that your computer is USB 3.0-capable. USB 3.2 Gen USB 3.2 Gen • Some computers have USB 3.0, USB 2.0, and 2 interface is 2 peripherals USB 1.1 ports.