Unfortunately, it looks like software tools are not going to help you as this is a hardware issue. Most likely, the controller PCBA has failed. To recover data, you'd need an identical model drive of the same capacity and preferrably the same firmware revision. Once obtained, swap the PCBA(printed circuit board assembly) from the good drive to the failed drive, then attach and boot. Many times this will correct the problem and enable recovery. If the drive still will not cycle, then the problem is internal and usually data recovery is very expensive, if possible at all, and requires a clean room.