I bought an used GBA Movie Player SD at a flea market. Unfortunately the previous owner has set a password. Unfortunately I do not know the password nor I can bypass the password screen. Does anyone know how to reset it? btw, it doesn't matter which SD card I use. The password is stored in the firmware.
Here's the last update for the GBA Movie Player SD. Should be able to update and in the process overwrite the password. http://devholden.com/M2-SD_BOOT-NDS_Update.zip
I've never had one of these, so I don't know about them specifically. But updating and/or downgrade the firmware should fix it. If not, open it up and see if there is a battery powering some type of memory. If so, remove the battery for a moment and try again. Good luck!
thank you very much. However I do not need it anymore. I've guessed the correct code. It was 12345678