If you are experiencing NO sound in Teams or issues with the sound please do the following:
Open the Teams APP by double clicking on the icon or thru your desktop icon.
Click on the 3 dots on the top right hand side next to your Icon and pick Settings
Click on Devices
Under devices you can pick which devices you would like to use with Teams. [ Speaker, Microphone ]
Depending on your setup, your monitor could have speakers and or you could have a separate camera.
If not, just pick the options and test.
After you have made the changes just close the window.