P2418HZm, camera and microphone not working

Hi,

I'm using a Toshiba Satellite L645 laptop with built-in camera and microphone with latest Windows 10 update. This laptop is connected to a Dell P2418HZm video conferencing monitor also with built-in camera and microphone being used as an external monitor.

The P2418HZm is working great and I have the laptop display turned off. I've been trying without success to use the P2418HZm camera and microphone rather than the laptop. The laptop is tucked away in a desk cabinet so not usable for video conference.

The P2418HZm camera and microphone do not show up as options in Zoom or Skype nor are they detected anywhere in Windows 10 Device Manager. I have downloaded and installed the drivers available on the Dell website but no change in detection. Not sure if the driver files can be moved somewhere that Windows will pick them up.

I have performed all the popular suggestions for fixing this with no success. I would be willing to bet this is a Windows issue but I'm hoping someone has some unique work arounds.

Thank you in advance.