TVs are randomly switched on or off in a different room as I turn on TV in another.
Check that smart HDMI control (CEC) is switch OFF on all devices. This can cause issues when more than one pair of devices (2+ TVs) are connected to a system. This will have different names depending on the device manufacturer. Common names include Hitachi: HDMI-CEC, LG: SimpLink, Mitsubishi: NetCommand, Panasonic: Viera Link or HDAVI Control, Philips: EasyLink, Pioneer: Kuro Link, Samsung: Anynet+, Sharp: Aquos Link, Sony: Bravia Sync or Bravia Link, Toshiba: Regza Link or CE-link, SKY: HDMI Control.