Update = After completing troubleshooting, a DELL-Cares agent setup a part replacement.
My device is a Inspiron14 running ubuntu 20.04. A run of ls /dev/video* gives me video0 and video1 I tried using ffmpeg -f v4l2 -video_size 1280x720 -i /dev/video0 -frames 1 out.jpg  to take a photo, the light did lit up but no photo was generated. And there are nothing covering the camera. So it is likely a software issue. What should I do now?   (People from Inspiron board told me to ask here. You can see more information at [URL]
Integrated webcam not working with Ubuntu 20.04