Hi
if you can feel the drive spinning, remove the baby board from back of drive, clean the contacts and at same time look for blown/heated chips or dry solder joints and replace the baby board onto drive
test, if works, start recovery of data immediately - do not wait or power down
if drive does spin, and you use a usb hdd plugin to drive, gently put pressure upwards (very very gentle as you can easily damage drive) and downwards, whilst feeling the heads move (be prepared for drive head crash) and if not feeling/hearing the drive heads move, very gently shake the drive whilst the drive is spinning
Only attempt the above if you are sure the drive is totally broken and you have accepted the loss in full
Be prepared to immediately start recovery if drive becomes available to OS and there is no guarantee of time it will remain working or what level of access it would give
The above has worked for me in the past, but no guarantees and only try it if you have accepted the full loss of data - using the above would decrease the chance of data recovery for a specialist data recovery firm
Lastly, data recovery specialist cost is not as much as you think, circa £600 for a sata 2 TB drive and most will not charge if cannot be recovered. It could even be a failed BIOS on hdd but not knowing what you drive is, cannot say if it has a BIOS or split on chips
Good luck and we always backup our systems using R1soft
Many thanks
John