Your not getting any message at all?
In bios, is your harddrive properly recognized?
Do you have a second, old harddrive you could test in the same role (primary boot device)?
Either I am missing something, or something is not being conveyed.
If you boot to a floppy drive (assuming it works) with a boot98 disk (www.bootdisk.com) does the problem recur?
I was certain it was a damaged floppy there for a moment