Hello and thanks for posting!
I have already made a direct reply to your email via firstname.lastname@example.org but also wanted to post a copy of my response here to cover all bases (although please only reply to the direct email so we can keep all communication in one place).
Copy of direct reply:
"Based on your description and looking at the monitor manual there are two different items to check, one for the webcam and one for the speakers.
In regard to the webcam, one quick thing to double-check is that when the monitor is connected to the Plugable dock with the HDMI cable, that the additional USB 2.0 cable that is required to connect from your monitor is also connected to one of the USB 2.0 ports on the back of the dock. This cable is required for the webcam to work.
The monitor manual shows this connection in more detail on page 16 (digital page 18) -> http://download.p4c.philips.com/files… and we just want to make sure that this USB 2.0 cable is properly connected to the Plugable dock rather than the PC.
In regard to the speakers, we want to check that the correct Default Audio Playback device is selected in Windows (this needs to be set to ‘Plugable Audio’). I made a short video that shows how to check and change this setting here -> https://youtu.be/6iUQxuN2AXw
Please let me know if checking the cable and changing the audio settings helps, and we will determine the next steps from there."