No audio on PC

[Partyguider]

I don't have a microphone or video on my PC, so I just listen to Zoom webinars using my speakers.  However, I used my phone recently for a Zoom meeting bc they wanted to see and hear me.  Now when I try to use Zoom from my PC, I can't hear anything.  What do I need to do in order to get it back to the way it was?  I tried uninstalling and reinstalling.  I can still use my phone for Zoom, but I want to use my PC!  Thanks.