Daniel65 wrote:

I'm asking for my sister, who has an Acer (I think) Laptop that has been
upgraded from Win 8.0 to 8.1 to 10 and makes use of Facebook group
Video-chat thingee.

Previously, when she has Video chatted, she can see and hear others and
they can see her, but not hear her, so she has to type in her responses
so others can then read them.

I duckduckgo'd for her "Enabling microphone in Windows 10" which brought
up lots of responses. Looking at the first selection, "How to Enable /
Turn On Microphone in Windows 10", she gave those suggestions a bit of a
go, but failed to improve her situation ...... because she says her
sound does work, i.e. she can, apparently, say "stuff" and record that
"stuff" and play that "stuff" back .... it's just that the "stuff" does
not get out on to the Internet!

Does anyone here have any suggestions as to what she could try, please??

Maybe the "Facebook thingie" has a Mute button, and she left it on. Or
she has to go into the "Facebook thingie" to enable the microphone,
perhaps on a per-room basis.

As for "not get out on to the Internet", there are sites to help test
your microphone works with a site, like:

https://www.onlinemictest.com/

No mention of which web browser is involved. Some will prompt you to
allow permission for them to use the microphone through the web browser.
That means it is possible that permissions were not granted to a site to
access the microphone through the web browser. In Firefox, for example,
go to aboutreferences#privacy, scroll down to Permissions, and click
on Microphone. Maybe that permissions is blocked for new requests, or
Facebook is listed as a blocked location. If nothing is in the list,
and if "Block new requests" is not enabled, you should see a popup in
Firefox asking for your permission to let the site access your
microphone through Firefox. In Microsoft/Chromium Edge, go to
edge://settings/content to check on permissions. The default should be
"Ask before accessing" which means you should see a prompt asking you to
grant a site permission to access your microphone, and there are black
and white lists for that permission. I no longer have Google Chrome to
look where its permissions are configured. Note: I'm assuming the
"Facebook thingee" is still something accessed via web browser.