On Fri, 10 Mar 2017 12:59:23 +0000 (GMT), Dave Plowman (News) wrote:

1) If it is in standby, it no longer appears on my LAN.

Neither does the windows PC here but it'll wake up when sent a Wake
On Lan "magic packet".

2) I'm not aware of a method of bringing it out of standby over the
internet. (it can be set to look for software updates etc overnight,
though)

WOL is tricky across the internet but it is possible, getting past
firewalls and NAT is the biggest problem. Not sure what you can do
via uPnP that is designed to blow holes in firewalls. Anything here
with the uPnP feature gets it disabled.

3) The LED on the front of the set changes colour between standby and
on. Think most would notice if it was on when meant to be off.

Probably under software control. The TV piece a day or so ago had a
TV running an "app" that appeared to do voice to text.

4) Can the really very cheap microphone fitted to such things
differentiate between the speech or music etc from the TV's own speakers
just a few inches from it and pick up intelligible speech from the other
side of the room?

That's more of problem.

--
Cheers
Dave.