Unfortunately your description is too unclear for me to have time at the moment to unravel it all. Also there are some ambiguities which add to the confusion. All I can do in the time I have available right now, is to correct one specific mistake, and highlight where more info is needed. I don't promise when/if I will have time for further replies:
quazimoto wrote:
My final tests show correct voltages except at the drive motor. I get .48v not the 5v I should get.
Your expectation is wrong. You should
not measure 5V with a multimeter at the motor connections - it's not a simple DC motor. Typically an oscilloscope would be used for this check, and then you could see the multi-phase signals which are used to drive that motor. Since I
think you're saying that the drive spins and the heads load, then a PCB problem is relatively unlikely.
If you accept the risks of DIY, which have been described on this forum many times (e.g.
you could change a recoverable drive into an unrecoverable one!), then IMHO you need to clarify
exactly what you mean by the drive not being recognised in Linux or Windows (there are multiple places where you could be checking for "recognition" in both OSs); also check for correct reporting of make, model & capacity of this drive in the BIOS disk setup screen, as this result may help with understanding your possible options.
However, as a minimum, even with the best of luck with the above answers (and your answers may suggest no further DIY progress, if you are unlucky), then usual best practices for DIY recovery would require you to have a spare empty 1TB or larger drive (or, less recommended for typical DIY IMHO, 1TB (or more) of unused filesystem space on an existing drive) - but your earlier comments suggested that you didn't want to spend money on this recovery. That may be why readers have thought that your situation was not realistic for DIY recovery attempts.