Update Luma. Copy the arm9loaderhax.bin from 6.6 to the root of your SD card.
I did that it works ! Thanks
Update Luma. Copy the arm9loaderhax.bin from 6.6 to the root of your SD card.

What did you do before this happened? Did you have a9lh? We need more info.hi friends
my 3ds with & without sd cart has black screen (turn off screen) but blue led in front 3ds turn on with & without sd cart constantly and turn off it after press 10 s power key.
have anybody idea ?
Thank you SO much for this tip, just saved me from what I was expecting to be a day's worth of trial and error to find out what went wrong!Update Luma. Copy the arm9loaderhax.bin from 6.6 to the root of your SD card.