Here are some steps to try if the integrated camera is not working on a Lenovo laptop.
Physical Camera Shutter
Some Lenovo laptops have a physical cover that you can turn off and on. If you look closely at your laptop’s camera, you may see a red dot. If you do, that means the shutter is on and disabling the camera. Slide the switch to the right to turn it on.
For the X1 Yoga:
For the X1 Carbon:
Lenovo Vantage Settings
After updates, the Lenovo application, Lenovo Vantage, may reset the camera privacy settings.
Select the Start Mena, and search for Lenovo Vantage and Open it.
Under Quick Settings, your Camera may be turned off. Click on the camera icon to enable it.
Windows Privacy Settings
Windows has its own privacy settings that can be blocking applications from using the camera.
Select the Start menu, and then select the Settings icon (gear).
Search for Camera, and select Camera Privacy Settings
Your camera may be disabled, or an app might not be allowed to use it. Scroll down to view the different options.