Chosen Solution
Ok ok I have an old 3ds, It was normal when I bought it I stopped playing for a while, and when I turn it on,The top screen was weird, the blue color was purple and the yellow color was green But when I open the fbi app The colors are normal again??? I dont know what happened (Sorry if I write something wrong, my first language isn’t English)
@manuzoka those symptoms would be common for a failing LCD. See if the colors now stay normal. Try other games and installers and see what you get.