Okay so i have the r4i 3ds rts says v6.1 on the front of the cart, back of the cart has c revision, i have used ntrboot in the past with this cart so this is extremely weird, i cannot properly restore my r4,so i narrowed it down to it only A5,A6,A7 being the only backup options, i have tried almost every single r4i 3ds rts variation backup and nothing no luck, the cart will show up but when booted it just stays on black screen eventually booting me back to 3ds menu, sd card works fine when all files are there from before the ntrboot flash and pc reads sd card just fine. Some revs install 9 chunks (a7,a5) and some install 32 chunks, while one installs 63 chunks. Any help appreciated.