Upgrading an Android TV from to v5.0 (Lollipop) is only possible if the manufacturer has released an official firmware update specifically for your model. If your device does not show an update in the settings menu, there is generally no official path to upgrade it. How to Check for Official Updates
Upgrading an Android TV or TV box from Android 4.4.4 (KitKat) 5.0 (Lollipop) update android tv 4.4 4 to 5.0 download
: It is often recommended to select Wipe data/factory reset before rebooting to ensure a clean install. Why Upgrade to 5.0? Material Design : A more modern, visual interface. Upgrading an Android TV from to v5