Does the BIOS recognise the disk? If not, then the problem is likely to be hardware related. Try reseating cables, check power is getting to the disk, etc. If the disk really is dead, then there's not a lot that you can do. Having said that, disks don't usually just die unless there was some sort of external cause (power spike, it was dropped, etc).
If the BIOS can see the disk, then the problem sounds like it's very early in the boot process (Windows gives more specific errors once it has control). A problem with the MBR on the disk could cause the sort of thing you are getting. There are utilities like SpinRite (
www.grc.com) that can help in this case. I have a copy and could lead it to you on the proviso you purchase your own copy if it fixes the problem. PM me if you want to try that option.
You could try a chkdsk, but I'm not sure you do that in your circumstances. Perhaps you can do this using the repair disk? Chkdsk verifies the integrity of the filesystem. I'm picking that's not the issue here.
Graeme