A:Answer Not sure, but here is what google said: enable hotel mode by pressing, at the same time, the down volume button on the side of your tv and the 'tv' button on the remote 3 times. A menu will pop up where you can set max volume to 0
via --> https://en.community.sonos.com/wireless-speakers-228992/panasonic-tv-internal-speaker-mute-33837