First-- try a new ribbon cable-- or swap one.
Then maybe this (freeware)-- if you can get in at all
-- now is the time.
PC INSPECTOR File Recovery
The clicking is probably the seek arm looking and not finding-- not good.
If the drive has failed-- and it sounds that way... the only trick I ever heard of was to cannibalize an
identical drive for it's circuit board-- swap them-- and it
might work long enough to recover those files. If it's an older model-- you might find one on EBay used.
Other than that you're looking at a forensic recovery lab ($$$$)
Sorry
