What to do if my Dell S3221QS has no video but the power LED is on?
- KKathy PerezSep 12, 2025
If your Dell monitor's power LED is on but there's no video, try the following: 1. Increase the brightness and contrast controls using the On-Screen Display (OSD). 2. Perform the monitor's self-test feature check. 3. Inspect the video cable connector for bent or broken pins. 4. Run the built-in diagnostics. 5. Ensure the correct input source is selected via the Input Source menu.













