If the icon is marked with a yellow exclamation mark, then the culprit of the current sound audio cards drivers download issues on the system. Find the Realtek High Daudio driver in the definition Audio from the drop-down menu. In that case, it would be helpful to follow the steps given in the article above in pointer number 5 to know in detail how you can fix the issue yourself. It is highly common for any net user to encounter sound problems if the sound card or the Audio Driver is outdated.
You can also do that if the “No Audio Output Device is installed” error still keeps showing up despite going through the fixes above.