Since my Macbook Air's battery has drained, it refuses to start (grey screen + globe)
According to the advices provided on the website, I tried to reset the PRAM but nothing happened. And after performing an extended test I had the following error message 4HDD/11/40000004:internal!

Actually, I am currently writing a book and the whole work is only stored on the hard drive!! Is there any chance I can get it back?
Thanks for your help!! I am desperate