Hold SELECT+power, to turn on device into LUMA settings.
Make sure your settings match this:
- Use the A button and the D-Pad to turn on the following:
- "Autoboot SysNAND"
- "SysNAND is updated"
- "Force A9LH detection"
- "Show current NAND in System Settings"
- "Show GBA boot screen in patched AGB_FIRM"
- If you are using a New 3DS, you should also enable the following:
- Toggle "New 3DS CPU" to "Clock+L2(x)" for improved game performance
--------------------- MERGED ---------------------------
I suspect maybe autoboot sysnand was not selected.