Ok, now is the time to not make any stupid moves! You say the drive spins up three times then shuts off. Does it "click" or "thunk" during the time it spins up? If so, you have need of a professional DR guru!
One of several thing may be at fault.
1- The PCB is fried.
2- The Preamp or Heads are damaged
3- The firmware is damaged
If "1" you need a solder repair station and donor PCB.
If "2" you need a DR lab.
If "3" you need special tools and software.
Only once in a great while when a drive is dropped and the problem is misalignment have I been able to bring the drive up by adjusting the head stack alignment.
In no case should you remove any Head Disk Assembly screws. If you must inspect the PCB just to make sure you have done all you can to identify any "fried" parts well go ahead at your own risk. Be sure to use an anti-static strap and proper tools. Remember "if the tools not right the boy's not bright".
Some people have had success by cooling the drive in the freezer and such but once again at your own risk.
Only you can decide just how important your data is. If it is very important trust it in the hands of a pro. Hopefully one without an ego. Not sure where to find one of those
Best of luck.