Hi , My Book Port is now working, after 24 hours of complete unresponsiveness. I'll mention below how it finally started working again. Now to answer some of your comments and suggestions: >Did you try resetting with 2 plus b? Yes, but it had no effect. > A lot of messages seem to be when people upgrade their unit. My Book Port failed once during an upgrade, and had to be returned to APH for repairs. That's why I stopped working as a beta-tester. This time the failure occurred simply as the unit was resting overnight. > I have seen a number of messages from this list of people not getting responses at all from the bookport, even when batteries are taken out and put back in, etc. Is there a certain procedure to prevent this problem? None that I know of. It seems to occur for no apparent reason. I've heard that this is a known issue with both the Book Port and Book Courier, but Springer Design has been unable to track down the cause. I don't know if there is a name for it, but I would be tempted to call it 'Book Port Sudden Death Syndrome' (BPSDS). > Does this happen often? While someone else stated that 'this is not a frequently occurring problem', as you noted yourself, there have been a number of messages from this list of people not getting responses at all from the bookport, even when batteries are taken out and put back in, so it does seem to happen fairly often -too often, in fact,from the perspective of those affected. > I just purchased a bookport, and I don't want to get it and start getting it ready only to have to send it back to aph. I guess it's just a risk Book Port owners have to live with. Most people will not be affected, but a certain number of users will invariably experience BPSDS. What I found was that simply placing the batteries back in the unit was not enough. I had to repeatedly jiggle/drag the positive tip of the lower battery against the contact in the Book Port until I finally heard the Book Port sputter back to life through the headphones. Since then the Book Port has been pretty flakey , and on occasion fails to respond to any key presses. Taking out and putting back in the batteries does not help, but jiggling/dragging the positive tip of the lower battery against the contact in the Book Port until I hear the Book Port come back to life through the headphones seems to work. Of course, every time this happens the Book Port also loses all its settings, but I guess that's another issue. I'm just glad it works at the moment. Peter