Brand: Dell
Category: Monitor
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for S2425HS/S2725HS
Uploaded: Nov. 21, 2025, 6:49 p.m.
Manual Publish Date: 2024-03
Warranty Information
Offers Premium Panel Exchange during warranty period.
Safety First: Always read safety instructions before use. Handle the monitor with care, avoid extreme temperatures, and ensure proper ventilation.
Setup: Attach the stand, connect cables (HDMI, power), and secure with Kensington lock if needed. VESA mounting is optional.
Operation: Use the joystick and front-panel buttons to navigate the On-Screen Display (OSD) menu for adjustments like brightness, contrast, input source, and color settings. Features like ComfortView Plus and Flicker-Free technology enhance viewing comfort.
Troubleshooting: Includes self-test, built-in diagnostics, and common problem solutions for issues like no video, missing pixels, or color problems.
Troubleshooting and error codes
| Common symptoms | What you experience | Possible solutions |
|---|---|---|
| No video/Power LED off | No picture | Ensure that the video cable connecting the 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 on. Ensure that the correct input source is selected in the Input Source menu. |
| No video/Power LED on | No picture or no brightness | Increase brightness and contrast controls through 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. |
| 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 about Dell Monitor Quality and Pixel Policy, see Dell Support site at: https://www.dell.com/support/monitors. |
| Stuck-on pixels | LCD screen has bright spots | Cycle power on-off. 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 Dell Support site at: https://www.dell.com/support/monitors. |
| Brightness problems | Picture too dim or too bright | Reset the monitor to factory settings. Adjust brightness and contrast controls through OSD. |
| Safety-related issues | Visible signs of smoke or sparks. | Do not perform any troubleshooting steps. Contact Dell immediately. |
| Intermittent problems | The monitor turns on and off | 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. |
| Missing color | Picture missing color | 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. |
| Wrong color | Picture color not good | Change the settings of the Preset Modes in the Color menu OSD depending on the application. Adjust R/G/B value under Custom Color in Color menu OSD. Change the Input Color Format to computer RGB or YCbCr in the Color menu OSD. Run the built-in diagnostics. |
| Image retention from a static image left on the monitor for a long period of time | Faint shadow from the static image that is displayed appears on the screen | Set the screen to turn off 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. |
| Screen image is too small | Image is centered on screen, but does not fill entire viewing area | Check the Aspect Ratio setting in the Display menu OSD. Reset the monitor to factory settings. |
| Cannot adjust the monitor with the buttons on the front panel | OSD does not appear on the screen | Turn off the monitor, unplug the monitor power cable, plug it back, and then turn on the monitor. |
| No Input Signal when user controls are pressed | No picture, the LED light is white | Check the signal source. Ensure that 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. |
| 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. Run the built-in diagnostics. |