What's your DHCP range?

With the G turned off, can you ping its address and get any response (telltale sign)?

I couldn't get any response with it turned ON.

However, with one - and only one - device powered on, you *should*
get a response. If the G is OFF, and you were to get a response on
that address, it indicates that something *else* is listening on it.
That would, therefore, point to an address conflict when the G is
turned ON.

Also, try flushing your arp cache before pinging:

arp -f (OS/2; I can't recall Windows, but instead of "flush," the
command "deletes all" - perhaps arp /d *)

No, SSID broadcast in the GS.

On the status page, you can see all connected devices.

This thread is moving rapidly from OT to TOT.