Does the Hp w1907 have a built in monitor microphone? If so, how do I activate it for an online meeting?

I'm sorry but it does not. I also wanted to find this out a long time ago. If you use skype or some other type of chatting. It will only output what is happening on the computer like watching a video or anything else. The only possible way for you to make a cheap and inexpensive mic is using the headphones that you have, and put them in the microphone slot in you PC and or Laptop.

There is a mic built into the monitor, I muted it once and then I just recently found it on my own after a long time of people telling me there isn't one even though I know I used it. First right click the speaker icon on the lower left screen and select recording devices, if your mic doesn't show up in the recording devices, right click the area where it is suppose to show and select show disabled devices. Your mic should show up there and then right click and select enable. If the right clicking doesn't allow you to enable it, just click the properties button on the bottom right of the window. Once there click on the device usage on the bottom and select enable.