If your console has a menuhax-based CFW setup, you should [clear HOME Menu's extdata](troubleshooting#other-troubleshooting), then follow all instructions on your SysNAND. You probably have a menuhax-based setup if your system version when booting without an SD card is 9.2.0-20.
If you see GodMode9, Decrypt9WIP, Hourglass9, or Luma3DS chainloader, you held (Start) by accident and should try these instructions again with (Select)