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: Some community members suggest installing actual 3DS system firmware or the Mii Maker app within the emulator as a more permanent solution.

Q: Can ErrFix3DSX fix all errors on my 3DSX device? A: ErrFix3DSX can fix common errors, but it's not a guarantee that it will fix all errors. If you're experiencing a rare or complex issue, you may need to contact the device manufacturer or a professional repair service. errfix3dsx

In 80% of "black screen after logo" cases, this resolves the issue instantly. : Some community members suggest installing actual 3DS

The file is a homebrew application that fixes this issue permanently by patching the save file or system data within the emulator environment. How to Use It errfix3dsx