@Technopimp:
Unfortunately most of your descriptions are vague / ambiguous / incomplete which makes accurate remote diagnosis difficult or impossible IMHO. It also seems that you don't have an electronics background, so I doubt that you will fix this yourself anyway, even if my guess below is correct.
Having said that, and if you are accepting the risks of DIY repair attempts, there was one part of your story which
might be pointing towards a
possible area for further investigation:
Technopimp wrote:
Sometimes I hear spin up then stop, spin up then stop...then other times I hear only light humming. I've noticed in the past that if I re-position the drive or re-connect the USB cable, it did spin up & was recognized but now it's mostly the humming, faint humming, real actually have put your ear up to the drive to hear it. [my emphasis]
That specific
empasised section above, plus your later info that the drive is spinning OK with a different PCB, suggests to me that investigating the USB connector and its soldering on the original board, would be a good thing for an electronics engineer to do. Due to the use of surface-mount connectors, and frequent mechanical stress of plug/unplug cycles, the soldering on these USB connectors is a weak point on modern disk drive designs.
If you can attach
close-up photos of that original USB connector (from a few different angles, showing the soldered joints between that connector and the PCB), then readers here might spot something obvious - but even if there is a problem in that area, it can be difficult to see without a microscope and without having the board in an engineer's hands. Again, this is an area where remote diagnosis is limited, so even if no problem is seen on a photo, that does not prove that no problem exists.
You should use ESD (anti-static) precautions when handing the drive and PCB. Potential damage caused by ESD is one of the risks you take when attempting "DIY" fixes.
Based on the comments you've supplied, I am not guaranteeing that further investigation in that area will be successful, but that is where I would start (although I'm an electronics engineer).
I completely agree with the recommendation by
northwind for a good pro, if the data is important to you
