First things first...
If you are using a Windows system, continuing reading below.
Step One: Verify Microsoft Windows Settings
Step Two: Make sure camera slider is open
Step Three: Check for a Privacy Shield/Protective Sticker
If you purchased a webcam privacy shield, please make sure it is open. If the image is blurry, the protective sticker may still be covering the camera.
Step Four: Press function key to turn on camera
Laptop keyboards have a quick way of shutting down or disabling
devices on your PC. With the numerous reports of camera hacking, laptop
manufacturers introduced this safety option. It can include a
combination of keys, or a simple press of a function key. Trying
the combination Fn + F6 or Fn + F9 or simply press F8 or F10. This will
not work for you if you do not see an icon of a camera in the F6, F8, F9
or F10 keys. Simply locate this icon and use the Fn combination or a
simple press of the key with the icon.
To see if the system has camera keys, search for function keys or camera in the user guide.
Final Step: Testing the camera