With Google assistant you can turn the TV on and off. You can change the
volume however that is the Chromecast volume, not the TV volume, meaning
the max volume will be hard set by the current TV volume. You can also
cast from several streaming servi...
Assuming the new laptop is on the same network then my first guess would
be a firewall preventing it from working. Take a look at
on step 5 t...
If you've already tried the factory reset using the volume buttons
then I recommend you contact support to see if there is anything else
they can do.