Black screen and problems [French]

Hi
I'm french so sorry if my english is bad (i use an translator) but i have a problem with my capture board.
When I try to start Homebrew there is a black screen. My friend say it's because I try do do the update (cause i play at sun&moon and it was required to have access to online features).
So I lost all my games, my pokemon bank ... but okay maybe it's my fault (I don't think you have an soluce for me ?)
The problem is now I can't use the console to add friend (for pokemon, to have safaris) because it still requires updating. And my friend told me don't do it otherwise I would lose my capture board.
So I can't longer play (i'm shiny hunter).
I don't know what to do, can you hep me ? Shall I send them the console? Will they be able to repair it?
I hope somebody arrive to understand me.
Thanks
I'm french so sorry if my english is bad (i use an translator) but i have a problem with my capture board.
When I try to start Homebrew there is a black screen. My friend say it's because I try do do the update (cause i play at sun&moon and it was required to have access to online features).
So I lost all my games, my pokemon bank ... but okay maybe it's my fault (I don't think you have an soluce for me ?)
The problem is now I can't use the console to add friend (for pokemon, to have safaris) because it still requires updating. And my friend told me don't do it otherwise I would lose my capture board.
So I can't longer play (i'm shiny hunter).
I don't know what to do, can you hep me ? Shall I send them the console? Will they be able to repair it?
I hope somebody arrive to understand me.
Thanks