You may have to go into the diskmanager and mount the drive.
If it works then you are OK, if it doesn't, listen to the drive when you power up the PC (stick your ear on the drive) you should hear it spin up and the heads move.
If you do, then download HDDRegenerator http://www.dposoft.net/ it has saved my bacon (and my drives on multiple occasions)
You can try before you buy.