Symptoms
- Video call app shows a black screen
- Computer says no camera found
- Camera light doesn't turn on
- Camera worked yesterday but not today
Likely causes
- CommonCamera permission disabled for the appOperating systems block camera access per-app, and updates sometimes reset this setting.
- CommonAnother app is already using the cameraMost webcams only allow one program to access them at a time.
- CommonPhysical privacy cover or lens cap left closedMany laptops and webcams have a slide cover that's easy to forget about.
- PossibleOutdated or missing camera driverA driver issue after a Windows update can make the camera invisible to apps.
- Less commonLoose or damaged USB connectionFor external webcams, a failing cable or port can cause intermittent detection.
What to do
- Check for a physical cover, cap, or slider over the camera lens and open it.
- Close all other apps that might use the camera, including browser tabs with video calls open, then reopen your app.
- Go to camera privacy settings (Settings > Privacy > Camera on Windows, System Settings > Privacy on Mac) and make sure the app is allowed.
- Restart the video call app, and if that fails, restart the computer.
- For an external webcam, unplug it and plug it into a different USB port directly on the computer, not a hub.
- Open Device Manager (Windows) and check under Cameras for a warning icon; update or reinstall the driver if one appears.
- Test the camera in a different app (like the built-in Camera app) to see if the problem is app-specific or system-wide.
Tools and parts
- None
External USB webcamSearch: “USB webcam 1080p”
When to call a pro
If the camera doesn't appear in any app or Device Manager at all, and driver reinstalls don't help, the hardware itself may be failing and needs professional diagnosis or replacement.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.