Howdy I am new here to this forum. My wife has a Samsung Galaxy Tablet that has been working fine for past 3 months. Suddenly yesterday in the middle of reading a Kindle book the screen went dim. It is only dim when displaying a Kindle book (any of three which she has loaded) all other apps and desk top displays normal brightness. This doesn't even seem possible to me but I know very little about tablets. Does anyone have a solution to this problem? Thanks for your reply.