Question Dead PCB or bad traces?

[SeagateFan1111]

I have a seagate hard drive that I broke the SATA port on. I bought a replacement board (model numbers all check out), and installed it today. Upon initial plug in, the HDD was active for less than a second making the little Pewww sound usually made by one turning off. I haven't been able to get it to spin since. Upon further inspection, I can get the PCB to work (heat on the chips), but the motor won't spin. Looking at the traces that the motor power connects to (on the actual drive) there are very minor divots where the contacts rest, but not too major. What precisely could be the issue?

 

[fzabkar]

Photos would help a lot.

Start by measuring the TVS diodes.

TVS Diode FAQ:
http://www.hddoracle.com/viewtopic.php?f=100&t=86

As for swapping PCBs, you need to transfer the patient's "ROM" chip to the replacement PCB.

"Adaptives" -- why PCB swaps don't work in modern HDDs:
http://www.hddoracle.com/viewtopic.php?f=56&t=2600&p=19090#p19090