Responder a:Changed batteries and it doesn't power up after that.Hey this worked! Thanks. I also had perfectly working keyboard and then I think the grey plastic cover where the battery terminal contacts got flipped around (I still can't see how). I struggled trying to pull out to flip over unsuccessfully. It did seem that when I put the batteries into the keyboard they were sticking out further than before even BEFORE placing in the foil ball , so it was very difficult to put the battery cover cap back on but the did the trick.