It appears like your current drive is dead and as such, the BIOS doesn't see it.. Of course, you could re-seat (pull out, then push back in) the laptop hard drive just to make sure that it's not something like a bad connection between the slip-in hard drive and the connectors to the motherboard.
Hope this helps.
I have a dell laptop and windows will not boot up, and I dont have the recovery discs. I went into BIOS, and went to change the boot sequence to HDD first, but there is no option to boot from the hard drive. There is no number beside the HDD, so it is not recognizing it. What do I do? Can someone please help? Thanks. The computer is a Dell Inspiron 1525 using windows vista.