take it back to the shop that you bought it cause its bound to still be under warranty if its only 10months old! Not being sarky, but that seriously gonna be the only thing you can do, it its got power from the mains and its still not coming on, and the battery isn't flat?? then its prob a hardware failure if its completely dead. If the battery is flat, and its not working from the mains, then it could jsut be a dodgy power adaptor.