Hi, I have a problem with my PRS-T2. It is stuck on the screen saver. Usually you just have to push the power button to go back to the page you left the book on but nothing is working now. can't go back to the book anymore

I've try resetting the reader with a paperclip but nothing happen. When I push the power button the light flash three times and is red. Is there something I can do? Its still under warranty but I wan't to know for sure before sending it back.
Thanks for any help.