For sure is what gamesquest1 said, its a dodgy blue card or SD Card.
Try using another flashcard like, any other R4 you have with you that can boot up.
You just have to put GW_INSTALLER.nds into the R4 and launch it
Try using another flashcard like, any other R4 you have with you that can boot up.
You just have to put GW_INSTALLER.nds into the R4 and launch it











