I can confirm the soldering points "consolex" posted.
I used the Anker ((68UNMCRD-B2U) : Realtek RTS5306) to dump the NAND 3x and wrote the patched NAND without problems.
Edit: I have the EU N2DS XL (from Germany)
@gamesquest1Is there a hard modding service in London, UK?
After test it's good
Sorry for this but I solder perfectly each pinout and test the contacts via HT327 sensitive tester. I'm a technician and this solders is not a big trouble for me so, I can guarantee that the microSD adapter and 2DSxl pinout are clean and sol When I power on the console It boot up normally in the Home menu...
What is wrong in this?
1. Soldering ( despite what you say )
2. did you hook it up to a sd reader?