No video - new laptop and updates installed

Hi there!

I have a new laptop and all updates are installed, light on but no video. 

I had no problems with Zoom last week but today I was on a call and everyone was on video but me.  I just called our help desk and they have confirmed everything is up to date - all updates are installed.  I've been using Zoom for two years and know the obvious settings.  Our teenage son took a look and he thinks there's a problem with Zoom.

Is there someone I can talk to?  Any suggestions?

I doubt it's a hardware issue as the laptop is only four weeks old.

Thanks in advance for your help!

Athena