Lenovo ThinkPad X1 Carbon Gen 13 camera or microphone is not working in calls

The checks in more detail

Then the Windows privacy settings: Settings, Privacy and security, Camera and Microphone, with access on for apps and for the specific app. If you have two apps open that want the camera, close one. Test with the Windows Camera app and the Sound settings input meter; speak and see the bar move. If the call app picks the wrong microphone, such as a headset that is no longer connected, change the input in its settings. The ThinkPad's microphone array supports noise reduction and Dolby Voice, which Lenovo Vantage can adjust;

turn the noise suppression off as a test, since it can cut speech in some conditions. Update the camera, audio and chipset drivers through Lenovo Vantage and restart. If a device does not show in Device Manager, check the BIOS under Security, I/O Port Access, for a camera or microphone option that is disabled. A Windows update sometimes breaks a driver, which you can roll back. If the camera works in one app and not another, the app's settings or permissions are the issue. If nothing works, Lenovo's support can check the module; have the serial number ready.

The X1 Carbon Gen 13 has a high-resolution camera and, depending on the configuration, an infrared camera for Windows Hello. If Windows Hello works and the ordinary camera does not, the issue is in the camera's own driver or app permission. The ThinkPad Vantage and Commercial Vantage apps have an Audio and Camera section where you can turn the camera and microphone on and off and adjust their effects such as background blur; check that none of these settings blocks the app. Microsoft Teams, Zoom and the browser each store their own device choice, so pick the camera and microphone again in each.