Verbatim 160GB Hard Drive won't boot.

Try it on another PC or on a powered USB hub: maybe it's not getting enough power to run.

If it still doesn't work, and you don't hear the drive's spin-up noise, the electronics may be damaged, the internal disk disconnected or the internal power connection faulty.

If you hear the spin-up whirring and then a series of repeated whirrs and clacks, ending after about 30 seconds - one minute, the disk might be damaged. It still might be recoverable if extracted from the case and connected directly to an appropriate hard disk port (a 3.5 to 2.5 adapter might be necessary), but when things go this far, the chances aren't too good.