Hello all, I have an apple aluminium wireless keyboard. All was working well until I replaced the batteries. I normally use rechargable ones and so took them out, charged them and replaced them. Now it just won't turn on. I push the button and nothing, no green lights etc. I thought it might be the batteries so I bought some energizer ones and still no joy. I have checked and double checked that they go in the rights way and that they are seated correctly and the cap goes back on properly but nothing. It is about 2 year old I guess. Is it dead?