SD init fail.....make me crazy:X 2560 rev b. (no replies)

Hi at all.Sorry my English,but I think here it's the best place for my problem.

Surely it's my mistake.But on my A10 I can't have access to SD card.
With stock no problem,try with marlin 1.1.9 and the problem appear. Try with last 2.0 bugfix same.

The problem is. On screen detect SD "card inserted".But if I go in menu "no SD card"

I try several way,but nothing to do.(low level format,change SD,check the firm pin)
I switch back with stock firm and still not working
What the hell?
The "SD init fail" appear in repieter on startup menu.


What I say.why? Why also with the stock?

But maybe it's my mistake.
Since was the first time I upload a firm on print,I take it from thinkinverse.In the file there were 2 files .hex
One with bootloader,and other normal.
I flash with bootloader and have to recover my board with my Arduino Uno as ISP,cause I cannot detect print.(no access to LCD,no detect via USB )
All ok...load marlin,and the sd problem begin.

Can that fact have cause some issue with LCD/sd?

I hope someone understand and help me rework SD.Cause for me it's very very important print from SD,due pc-print distance.

Best regards