|What makes you think it wont spin? Modern hard drives are so quiet it is difficult to tell if they are spinning. The only positive way of telling is if they work properly.|
The fact that it isn't working can be down to a number of things. Have you tried running the manufactures diagnostics on it. That will identify what is really wrong with it.
If the drive really has stopped spinning then there is not a lot you can do about it except give it to a data recovery company and be prepared to spend a lot of money. Backups are cheaper.
There is one trick you can try and that is to put the bag inside a fridge in a plastic bag for a few hours. The cooling sometimes shrinks the metal enough to allow the disk to spin sufficiently long to recover data of the disk. However it is a last ditch effort. You have to be quick when you take the disk out of the fridge before the spindle heats up and seizes again. It is usually a once only thing as the condensation produced often kills of the drive completely.