Check your video cable. First to make sure both ends are firmly seated in their sockets. Next, if it is old and or kinked, replace it. If these don’t repair, attach to another pc to see if it is the monitor that has gone bad.

If it always flickers when you have zoom calls, I would go to Control Panel > Device Manager > Display adapter, right click on driver and choose Update. Maybe that will help.

Try a different browser, if using MS Chromium Edge or Chrome, try Firefox. Try going to your GPU manufacturer’s site and try their driver. Sometimes it is better than the one MS installs.

I’m not sure, I think about 2 years?? It isn’t old and it works perfectly well except the screen starts to flicker randomly or whenever I have zoom calls.

Hello! I suspect that the monitor is the issue in this case. How old is it?