Hello
thanks for your answer

the trouble started just after a night pause reading, not after added a new book.
all books were and the SD card, I removed it.
still trouble.
right now, not able to see the T1 with few computers, few cables too (I tried before coming on the forum)...not try with my only linux computer.
sorry but when you wrote :
Go the the following thread and download the bootable sad card image
which thread ?
this one ?
https://www.mobileread.com/forums/sh...d.php?t=175101
and if yes, I've already used the wiki link with SD car, and it never worked

that is why I'm here to find solution.
I think so that my daughter will have a new reader

(it is her, it is my old one, she used some times, like she reads paper books normally)