I recently noticed that I still have an old R4 flashcard R4ISDHC RTS LITE (from www.r4isdhc.com). I got it probably between 2012-2013. I tried to insert it to my 3ds but it appears blank. I think that I tried flashing its firmware back then and I did something wrong. So, I tried to fix this by downloading a .nds file to upgrade the firmware from the website. However, to run the .nds file the flashcard must be working. So I tried running the .nds file in 3ds's twilight menu+ but it does not seem to work. When I try to run the flashcard through twilight menu it appears as slot-1 ? and I get a black screen with four coloured squares. I was wondering if there is another way to reflash the card's firmware back or if it has potentially been bricked.