I've managed to bring back my iHP-120 from the dead.

A format, and re-installing all my files has the unit up and working again.
NO idea why the 120 was not being recognised by my computer, or wouldn't even communicate with it.
Still being shown as a "Local hard Drive", and not an iHP-120 as I believe it
was before my troubles.
Hoping that this will be end of my iHP-120 problems for a while.
Fingers crossed.
Happy Thanksgiving to those in Canada?
PBrewer. up the cherries.