Sony Reader PRS-T2 User Manual page 230

Reading Books
Cannot open a book.
 You must be the account holder who purchased the book
to read it.
 The transferred book may be protected by digital rights
management; in this case, the Reader and the computer
must first be authorized. For details, refer to the [Help]
menu of the Reader software.
 The book may be protected by unsupported digital rights
management technology.
 The book may be in an unsupported file type. For details
on supported file types, see Details.
"Continue Reading" does not work, or the bookmark is missing.
 If the file status has changed (such as in the following
cases), data under [Continue Reading] or notes may be
deleted.
 A text/PDF file is edited.
Cannot find content on the Reader.
 If you have formatted the Reader on your computer, the
Reader may not be able to display transferred content. In
this case, use the Reader's [Format Memory] function to
reformat the Reader. See Details.
 Although protected on the Reader, books may be deleted
Table of Contents
Troubleshooting
230