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Summary of Contents for Dell S2725QC
- Page 1 Dell 27 Plus 4K USB-C Monitor S2725QC Simplified Service Manual Model: S2725QC Regulatory Model: S2725QCb March 2025 Rev. A00...
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Page 2: Notes, Cautions, And Warnings
A WARNING indicates a potential for property damage, personal injury, or death. Copyright © 2025 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners. -
Page 3: Table Of Contents
Views of S2725QC monitor ........ -
Page 4: Safety Instructions
Safety Instructions Use the following safety guidelines to protect your monitor from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped with your monitor. -
Page 5: Views Of S2725Qc Monitor
Views of S2725QC monitor Side view Figure 1. Side view Views of S2725QC monitor... -
Page 6: Front View
Charging 1.2 *To avoid signal interference, when a wireless USB device has been connected to a USB downstream port, it is NOT recommended to connect any other USB devices to the adjacent port(s). Views of S2725QC monitor... -
Page 7: Back View
Regulatory label Lists the regulatory approvals. MyDell QR code, serial number, and Refer to this label if you must contact Dell for technical support. The Service Tag label Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your monitor and access warranty information. -
Page 8: Bottom View
To lock the stand to the monitor using a M3 x 6 mm screw (screw not included). Security-lock slot (based on Secures the monitor with a security lock (purchased separately) to Kensington Security Slot) prevent unauthorized movement of your monitor. Connect the power cable (shipped with your monitor). Power port Views of S2725QC monitor... -
Page 9: Major Components Of Your Monitor
Major components of your monitor Figure 6. Major components Major components of your monitor... - Page 10 Power board Stand base NOTE: For replacement of power cable, connectivity cable and external power supply (if applicable), contact Dell: 1. Go to Dell Support Website. 2. Verify your country or region in the Choose A Country/Region drop-down menu at the bottom-right corner of the page.
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Page 11: Wiring Connectivity Diagram
Wiring connectivity diagram Figure 7. Wiring connectivity diagram Table 5. Cables Item Description LVDS (Low-Voltage Differential Signaling) cable Speaker cable USB board cable Backlight cable Wiring connectivity diagram... -
Page 12: Connecting The Cables
NOTE: Dell monitors are designed to work optimally with Dell-supplied inbox cables. Dell does not guarantee the video quality and performance if non-Dell cables are used. To connect your monitor to the computer: 1. -
Page 13: Disassembly And Reassembly
Disassembly and reassembly CAUTION: The information in this section is intended for authorized service technicians in the EMEA region. Dell prohibits users from disassembling the monitor, and any damage caused by unauthorized servicing will not be covered under the warranty. -
Page 14: Stand
Stand Removing the stand Prerequisites 1. Follow the procedure in Before working inside your monitor. NOTE: To prevent the LCD screen from scratches during stand removal, ensure the monitor is positioned on a soft surface and handled carefully. NOTE: The following steps are specific for removing the stand that is shipped with your monitor. If you are removing a stand that you purchased from any other source, follow the setup instructions that are included with the stand. -
Page 15: 11. Installing The Stand
Installing the stand Steps 1. Carefully insert the tabs on the stand riser into the slots on the display back cover and press down the stand assembly to snap it into place. Figure 11. Installing the stand Next steps 1. Follow the procedure in After working inside your monitor. -
Page 16: Back Cover
Back Cover Removing the back cover Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. Steps 1. Remove the four screws (M4x10) that secure the back cover to the display assembly. 2. Using a plastic scribe, pry the back cover starting from the edge of the monitor. 3. - Page 17 Figure 13. Removing the back cover Disassembly and reassembly...
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Page 18: Installing The Back Cover
Installing the back cover Steps 1. Connect the control board cable to the connector on the interface board. 2. Align the back cover with the display assembly and snap it into place. NOTE: Align the screw holes on the back cover with the screw holes on the display assembly before applying slight pressure to the back cover. - Page 19 Figure 15. Installing the back cover Next steps 1. Install the stand. 2. Follow the procedure in After working inside your monitor. Disassembly and reassembly...
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Page 20: Interface Board Assembly
Interface board assembly Removing the interface board assembly Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. Steps 1. Disconnect the speaker cable from the interface board. 2. Peel the tape that secure the speaker cable to the display panel. 3. - Page 21 Figure 17. Removing the interface board assembly Disassembly and reassembly...
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Page 22: Installing The Interface Board Assembly
Installing the interface board assembly Steps 1. Slide the LVDS cable into the connector on the display panel and close the latch to secure it in place. 2. Adhere the tape to secure the LVDS cable connector to the display panel. 3. - Page 23 Figure 19. Installing the interface board assembly Next steps 1. Install the back cover. 2. Install the stand. 3. Follow the procedure in After working inside your monitor. Disassembly and reassembly...
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Page 24: Interface Board
Interface board Removing the interface board Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove the interface board assembly. Steps 1. Peel the mylar from the interface board assembly. 2. - Page 25 Figure 21. Removing the interface board Disassembly and reassembly...
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Page 26: Installing The Interface Board
Installing the interface board Steps 1. Connect the power cable, LVDS cable, and USB board cable to the connectors on the interface board. 2. Align and place the power board and interface board to the bracket. 3. Replace the seven screws (M3x9) that secure the power board and interface board to the bracket. 4. - Page 27 Figure 23. Installing the interface board Next steps 1. Install the interface board assembly. 2. Install the back cover. 3. Install the stand. 4. Follow the procedure in After working inside your monitor. Disassembly and reassembly...
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Page 28: Power Board
Power board Removing the power board Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove the interface board assembly. 5. Remove the interface board. Steps 1. Disconnect the AC socket cable from the connector on the power board. Figure 24. Removing the power board Disassembly and reassembly... -
Page 29: Installing The Power Board
Installing the power board Steps 1. Connect the AC socket cable to the connector on the power board. Figure 25. Installing the power board Next steps 2. Install the interface board. 3. Install the interface board assembly. 4. Install the back cover. -
Page 30: Troubleshooting Instructions
Troubleshooting 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 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. -
Page 31: Built-In Diagnostics
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 graphics card. Figure 27. Self-Diagnostic menu To run the built-in diagnostics: 1. -
Page 32: Common Problems
• Cycle power On-Off. 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 • www.dell.com/pixelguidelines. Stuck-on pixels LCD screen has bright Cycle power On-Off. - Page 33 Safety related issues Visible signs of smoke or Do not perform any troubleshooting steps. • sparks • Contact Dell immediately. Intermittent problems Monitor malfunctions on • Ensure that the video cable connecting the monitor to the computer is and off connected properly and is secure.
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Page 34: Product-Specific Problems
Product-specific problems Table 8. Product-specific problems and solutions. Common symptoms What you experience Possible solutions The screen image is too The image is centered on Check the Aspect Ratio settings in the Display menu OSD. • small the screen, but does not Reset the monitor to factory settings. -
Page 35: Universal Serial Bus (Usb) Specific Problems
Universal Serial Bus (USB) specific problems Table 9. USB specific problems and solutions. Common symptoms What you experience Possible solutions USB interface is not USB peripherals are not Check that your monitor is turned on. • working working Reconnect the upstream cable to your computer. •... -
Page 36: Contacting Dell
Contacting Dell To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell. NOTE: Availability varies by country and product, and some services may not be available in your country. NOTE: If you do not have an active internet connection, you can find contact information about your purchase invoice, packing slip, bill, or Dell product catalog.
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