Hi Florent,
When you still see a coloured icon with a specific S version, for instance, S6 or S10 your device is still trying to connect with the default premium connection.
Then you still need to shift it in your screen menu.
- Set screen to source HDMI (this will unlock greyed-out menu items)
- Menu>Netwrok>Server network settings> Magicinfo mode
- Re-fill your server settings
Kind regards, Pepijn.