Help! My Display (Computer Monitor) Isn't Working!

Issue

A user reports that their monitor is not working. The screen remains black or unresponsive even after powering on their computer.

Environment

• Windows/Mac

Resolution

✅ 1. Check the Power

• Ensure the monitor is plugged into a working outlet and powered on.
• Inspect the power cord for damage.
• Try plugging the monitor into a different outlet.
• Press the monitor’s power button (usually located on the front or side of the display).

✅ 2. Check the Cables

• Verify that the video cable (HDMI, DVI, USB-C) is securely connected to both the monitor and the computer or docking station.
• Unplug and replug the cable to reseat the connection.
• Visually inspect the cable for wear or damage.

✅ 3. Check the Display Settings

• Windows:
  • Right-click on the Desktop and select Display Settings.
  • Review connected displays and ensure the external monitor is enabled.
• macOS:
  • Click the Apple menu → System Preferences → Displays.
  • Confirm that the external display is recognized and set to "mirrored" or "extended" as needed.

Cause

Common causes for a non-functioning monitor include:

• Power supply issues
• Loose or faulty HDMI/DVI cables
• Incorrect display settings
• Hardware failure in the monitor or graphics output