If it's a physical failure then it's the worst scenario of data recovery
. In this case you need to replace the logic board of the hard disk. The logic board for your hard disk can be found over internet or from any computer hardware shop. Replacing the logic board needs the knowledge where exactly the logic board rests on the hard drive. It also requires some mechanical work with the screwdrivers. If you are not sure about it then it would be better to hand over the job to a professional. After replacing the logic board you may recover your lost data.