It can do. Basically if this data is critical, it's not advisory, if it's something you can live without, give it a try.
Could just mean that the power to it's gone. If powered up the disk should spin internally, causing vibration. No spinning, no access.
If you've got a desktop to plug the drive into directly that'll rule out power supply (the board/ribbon cable etc) or if the board on the HDD has gone, which makes things a tad more complicated - basically having to find a 2nd hand drive of the same model, swap the boards out then put it back in.