I purchased one as a gift and am trying to set it up. Two questions: How the heck do you turn the darn thing on/off? There is no power button on this model, I've googled the heck out of it and can't find any help pages for the HD. I've set up an account, however, when I go to log in on the Amazon page, it's telling me me invalid email/password. I also noticed that it takes your email and changes it over to @kindle.com. So, I've tried both combos.