Sounds like its a mechanical failure rather than corrupt data. If you have a clean room at hoom you can open it up and look for obvious damage. If you dont, or you just dont want to then your going to have to pay out a pretty hefty sum for professional data recovery. I garuntee you that all data recovery companies WILL be able to get your data back but it comes at a large price.
It depends, if it was just useless images and uniportant docs then its prob not worth it, but if it had the ONLY copy of the companies tax rates and data backups then you may want to look into it a bit more.
Have a search around google for professional hard drive data recovery and see what you get.