@paulbates Unfortunately ALPSTUGA doesn’t expose the entity to turn the display off over matter. It has some built-in option that dimms the display during night hours (I don’t remember which exactly they are). You need to have the time set on the device to make it work. There is no build in functionality to sync time for Matter devices in Homeassistant but fortunately @Loweack came up with the solution. Please check out his Matter Time Sync add-on on HACS - [MATTER] Sync Time with Matter Devices (e.g. IKEA ALPSTUGA)