I have my New 3DS XL with Luma3DS installed both on the SD card and the CTRNand. When I press the power button, the 3DS just sits at a back screen. It successfully boots into GodMode9, and successfully boots without the SD card. I used 3ds.guide to install Luma3DS and have Luma3DS installed on my CTRNand. Also, sorry if this is a noob question but, what's the difference between CtrNand, SysNand, and EmuNand? Any help is greatly appreciated.