If you're not sure if the drive will spin or not, try just plugging in the power only, and then boot up. If it doesn't even spin, the jumpers won't really matter :-(( If it does spin, but the computer doesn't acknowlege there's a drive there when you've hooked up the cable, try the jumpers. Or, if it was the C: drive in the original computer, try hooking it as the C: drive in the substitute unit. If it's still unbootable, consider getting SpinRite 5 (or Recover98, though I'm not personally familiar with it). With Spinrite you boot from a SpinRite floppy & run it from there. Let us know how things are progressing. Good Luck!