I have a F6 v1.4 board. I uploaded the firmware from fysetc F6 github. Everythings is looks fine. But sd card does not read. I get "init fail" error.
When I insert the jumper seen in the picture, the sd card light is on but I get the same error again. Also the endstopples home stopt the working when the jumper is attached.
Where am I making a mistake?