My heart stop for 2 minutes..
But @jernk post help me.
Now, my 3ds is....
But @jernk post help me.
If your homescreen shows up after removing your sd card (assuming you have a black screen when it's inserted) you need to delete 000002cc/d/e (depending on your region) in your sd card's extdata in the Nintendo 3DS folder
Now, my 3ds is....