Hello musicman and marf
Thank you for your replies. I did get it working again and believe it or not it was a very simple problem. The plug adaptor had stopped working. When I bought the Pocketbook it had a European plug soldered onto it, so I had to get an adaptor for it. It has stopped connecting properly. I was lucky that I had a spare adaptor in the house.
My Pocketbook is important to me and has become almost like a little friend. I am a happy bunny again.