Do I need the firmware on my micro SD card?

My 2DS flashcard that plays borrowed DS games just gets a black screen. Finally got it in the slot without having to hold it down. In the 2DS menu, it says something in Chinese, when I try to play it, shows a white screen for a second, then a black screen.

Either need the firmware, or it doesn’t like my Samsung micro SD card.

Yup it works now with the firmware. Just download the old WOOD firmware from r4ids.cn. Extract the RAR, and copy the files to the root of your micro SD card.

DS games don’t use the whole screen.