Dell P2426HE (DELL-P2426HE) service manual

Contents

1. Safety instructionsp. 5

   Use the following safety guidelines to protect your monitor from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure in…

2. Before working inside your monitorp. 6

   Steps 1. Save and close all open files and exit all running applications. 2. Turn off your monitor. 3. Disconnect your monitor and all attached devices from…

3. After working inside your monitorp. 6

   CAUTION: Leaving stray or loose screws inside your monitor may severely damage it. Steps 1. Replace all screws and ensure that no stray screws remain inside…

4. View of P2426HE Monitorp. 7

   Front view 1 Figure 1. Front view of the monitor Table 1. Components and descriptions. Label Description Function 1 Power LED indicator Solid white light…

5. Front viewp. 7

   Figure 1. Front view of the monitor Table 1. Components and descriptions. Label Description Function 1 Power LED indicator Solid white light indicates the…

6. Back viewp. 8

   1 2 3 4 5 6 Figure 2. Back view of the monitor Table 2. Components and descriptions. Label Description Function 1 VESA mounting holes (4) (100 mm x 100 mm)-…

7. Bottom viewp. 9

   4 5 6 7 8 9 1 3 10 11 8 10 Figure 3. Rear and bottom view of the monitor Table 3. Components and descriptions. Label Description Function 1 Security lock slot…

8. Major components of P2426HE monitorp. 10

   The following image shows the major components of P2426HE. Figure 4. Major components of P2426HE monitor Table 4. Major componets. Callout Description 1 Stand…

9. Wiring connectivity diagramp. 11

   Figure 5. Wiring connectivity diagram Table 5. Components and descriptions. Callout Description 1 LVDS cable 2 Lightbar cable 3 USB cable 4 Keypad cable

10. Connecting your monitorp. 12

    WARNING: Before you begin any of the procedures in this section, follow the Safety instructions. WARNING: For your safety, be sure that the grounded power…

11. Disassembly and reassemblyp. 15

    CAUTION: The information in this section is intended for authorized service technicians in the EMEA region. Dell prohibits users from disassembling the…

12. Recommended toolsp. 15

    Screwdriver Phillips screwdriver #0 • Screwdriver Phillips screwdriver #2 • Plastic scribe

13. Screw listp. 15

    NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This…

14. Standp. 16

    Removing the stand Prerequisites 1. Follow the procedure in Before working inside your monitor. Figure 12. Removing the stand Steps 1. Place the monitor on a…

15. Back coverp. 18

    Removing the back cover Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. Figure 14. Removing the back cover…

16. Keypad boardp. 20

    Removing the keypad board Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. Figure…

17. I/O Coverp. 22

    Removing the I/O cover Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove…

18. USB Boardp. 24

    Removing the USB board Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove…

19. Main chassisp. 26

    Removing the main chassis Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove…

20. Middle framep. 28

    Removing the middle frame Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove…

21. Main boardp. 30

    Removing the main board Prerequisites 1. Follow the procedure in Before working inside your monitor. 2. Remove the stand. 3. Remove the back cover. 4. Remove…

22. Power boardp. 32

    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…

23. Troubleshootingp. 34
24. Self-testp. 34

    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…

25. Built-in diagnosticsp. 34

    Your monitor includes a built-in diagnostic tool to help you identify whether the screen abnormality is due to an issue with the monitor itself or with your…

26. Common problemsp. 35

    The following table contains general information about common monitor problems you might encounter and the possible solutions: WARNING: The monitor LCD panel…

27. Product-specific problemsp. 36

    Table 8. Product-specific problems Specific symptoms What you experience Possible solutions The screen image is too small Image is centered on the screen, but…

28. Universal Serial Bus (USB) specific problemsp. 37

    Table 9. USB specific problems and solutions. Specific Symptoms What you experience Possible solutions USB interface is not working USB peripherals are not…

29. Contacting Dellp. 38

    To contact Dell for sales, technical support, or customer service issues, see Contact Support at Dell Support Site. NOTE: Availability varies by country or…

30. Revision Historyp. 39

    The following table provides the revision history of this document: Table 10. Revision history Revision Date Description A00 March 2026 Original publish date.