Hi there,
I am sorry to be the bearer of a bad experience and i am by no means an expert but.....
I had this problem about a month ago with the same type of laptop. It would just not go into windows whatever mode i slected from this black start up screen.
I phoned the Vaio help line to be told it was most probable that the hard drive was corrupted or something and it would cost �500 to repair.
My laptop was 4 years old so i resigned myself to the fact that it had given up on life and had to fork out for a new one.
As i said i am no expert, so there maybe someone more qualified able to help if you post this question in the technology area.