Actuaor arm is not engaging you will have that wonderful clicking noise and not be able to access the data (boot the OS or recover the data) there are three options. One, keep trying, sometimes you get lucky and get one more shot at it with Ghost. Two, If you have another HDD with the "exact" model and design specifications you can change the logic voard in case the problem is the board and not the mechanics. Three, find a local HDD recovery facilty if your daata is that important, but htey are incredbly expensive and unless you are talking Health issues or Corprate dat it is probally not worth it.
In the future, from a former Seagate service tech, "Make Backups"