@sonyvaio:
You seem to be wondering why you didn't get any replies - I didn't reply earlier, since although it's clear you're trying to help, comments like "still doesn't work" are much too vague for me (and probably for other readers) to even guess at the problem, or whether your tests were done correctly.

Don't forget that we can't see your drive, or what keys you pressed, or hear what sounds it is making etc. - your description is all we have to use, unless someone wants to try to guide you step-by-step through diagnosis (which isn't me, in this case).
Since you've now tried it in (at least) 2 different systems, then it seems
likely that the disk has a fault. The disk is spinning so it's unlikely to be a PCB problem (typically). That means that whatever else the problem is, it's almost certainly not a DIY problem that you'll solve.
With that disk in your desktop (and preferably any other disks temporarily disconnected), further diagnosis could be attempted in a few different ways e.g. using an MHDD boot CD to see how the disk responds to an ID command, and then
possibly to other commands (depending on how it behaves) - but until the disk is recognised by a normal OS, you won't manage to reformat it for further use. Therefore such attempts at further diagnosis have little real benefit since they won't fix anything, and you don't need to give the answers to a DR company to discuss the liklihood of getting any data off the disk, and any repairs needed to that disk will probably cost more than just buying another equivalent disk.
And even if you did get it repaired, would you want to use a disk again, if there is any suspicion that it could not be relied upon? Despite using backups, I would rather not have the inconvenience of a disk failure, if I can avoid tempting fate by using suspect hardware.
I realise that's probably not what you wanted to hear. Feel free to wait for another reader to come along and say something different.
