The screen casting in the conference room had no sound today; the issue turned out to be a very minor setting.

The company's conference rooms were reported for repairs repeatedly today, with users saying the screen casting video was normal but there was no sound in Teams meetings. On-site checks of the HDMI, speakers, and power supply showed no issues, and a reboot only fixed it for a minute. I finally checked the system sound devices and found that after a firmware update last night, the default output…