From GameBrew - a wiki dedicated to Video Game Homebrew.
Finally, an arm9 payload fake brick for me!
Yes, as you seen the title, a fake brick screen early on boot! Fool your friends and your families that you have bricked your 3DS! It feels like a malware ad now
It will boot an a9lh payload named NandUnBricker.bin on the root of the sd card after a few seconds. If you don't have a file named like that, it will just completely frozen at the brick screen simulating a real one. It also need the screen-init A9LH
There's also a hidden easter egg, try to find it. If someone finds it, @Wolfvak. the coder of this payload will release the source.
@Wolfvak for coding this
@Reisyukaku and @Aurora Wright for the base code
@mid-kid for the framebuffer offset
@b1l1s for the CTR Library
@dark_samus3 for the screen-init A9LH