Does the timeline show an audio track? If not, highlight an audio track by clicking on it so it turns blue, then try dragging a file to the timeline.
The only other thing I can think of, and it’s happened to a few of us, is that you have to set the audio hardware in preferences. When you play a clip does the audio meter on the left show that there is audio? If so go to edit>preferences>audio hardware. At the top there’s a dropdown called Device Class. Try changing that. Try changing the other 3 settings. Sometimes they default to other devices that don’t play through your speakers. Remember, only do this if the audio meter and the audio track in the timeline show that there should be audio.
In the meantime, one of the more technical among us will probably come along and give you instructions you can actually understand 😉
Hope this helps.