Never had problem with Gba,Dsi ware app or monster hunter.Should i try that fix anyway?It's not an emulator. Via nds-bootstrap, it runs DS roms on SD Card natively.
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Check the FAQs for the black screen issue.
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Ah,and i can't boot anything,like ds cartrige.I still get black screen with errore message.In the normal emunand i can launch that,i don't think that's the error posted in the Faq ;(