Hi,
I cannot find in the internet how/if I'm able to change network name of Chromecast built-in from my Sony TV (Android 8)
It says now some default name "Bravia4KBlaBlaBla". This name is displayed as available casting device in my cell phone. I never set something like this in TV.
When I turn on TV from sleep, and wait for few minutes, this Chromecast built-in is discovered in the network with different name of "Cinema Room TV" -> this is correct and reflects the name I have set up in TV in the settings. This time, the name "Bravia4KBlaBlaBla" is no longer available.
Does anyone have the same observations?
Storage > about > Device name
That "should" be all there is to it.
I would try doing a full system restart too, not just sleep. Either from the same about menu, or by holding the power button on the remote until it says "powering off".
That may help, but I don't know for sure I'm sorry. When I set my TVs name it has always stayed the same since.