Thanks for your answer DNSB, I followed the instructions with the paperclip, I don't know if I push it at the right moment because I can't see anything on the screen, except a black blink each time it restarts, and there's no result at all.
Is there's another solution?

the how-to page is in french, but I guess you can read it with google trad:
https://www.phhsnews.com/how-to-add-...book-reader678

and have a good day!