1. Make sure that a camera is installed and enabled on your computer.
2. Check there is no obstruction or blockage in the camera lens
3. Close other applications that might be using the camera
4. Check that the permissions/settings for the camera are set correctly in Windows Settings (or in the Teams app)
5. Test the camera in another app or website to make sure it works
6. Test that the camera software is up-to-date
7. Make sure your device meets the system requirements of the meeting service (i.e. Teams)
8. Check that the camera is compatible with the app and OS versions you are using
9. Try restarting your device
10. Try uninstalling and reinstalling the meeting software