Perhaps you can elaborate on what you have done. You may not know all the options. I’ve been here quite a while and I’m still learning what some of the possible options are.
Have you tried a different SD card?
Did you format the SD card?
Why did you put your Flipper in DFU mode?
What did you do before putting the Flipper in DFU mode?
1 Have you tried a different SD card?
i tried another sd,
2 Why did you put your Flipper in DFU mode?
I repaired the flipper center according to the video on youtube.
3 What did you do before putting the Flipper in DFU mode?
https://www.youtube.com/watch?v=bW5YjUO91sYThis is a video like me.
Did you do this?
Yes I did but the problem still persists.
Perhaps someone else will have an idea.
Try to reset the software. Updating, Formating de SD card and downloading the software.