Since the start of the pandemic and the shift to remote work, I have received more cases involving broken webcams or microphones than ever before. I always begin by performing basic troubleshooting steps, such as checking drivers, settings, and the F1-12 keys, but nothing seemed to work.
After spending hours updating drivers, BIOS, and Windows, I finally found a solution with the help of the internet. Some people have reported that turning off their computer, unplugging the battery, and holding down the ON/OFF button for at least 40 seconds can fix webcam and microphone issues. I was skeptical, but I suggested this to a user as a last resort and it worked for 90% of my cases.
Sincerely a confused IT-guy.