Samsung HD501LJ deadish pcb?

[dstrat]

Hi all. Hope you are good.

I have a Samsung HD501LJ 500gb T166S that will not spin up. I was running it off one of those SATA to USB cables from outside my case. I can't be entirely sure what happened but basically I got the acrid electronic fumes come out and it would not spin up when I tried it today. What I think may have happened is that something on the PCB may have shorted out against a raised, meshy part of my pc (where the fan is) that I had it sat on.

Everything looks fine other than this one 'thing'. I'd appreciate it if any of you could have a look of the photos and advise me of my next step. There is that thing which appears to be scorched. The TVS diodes both appear intact - high value one way and lowish value the other.

I actually happen to have another 501LJ; I tried swapping the boards over but all the drive did was spin up - it wasn't recognised however. Any help would be appreciated please! Can i replace the thing on the board? My other drive was identical in all numbers other than the serial and the P/N was a bit different..if I need a PCB swap what do I need to look for?

Thanks in advance for any help.

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[sathyan]

You can try to replace the burnt component (you will need smd repair tools),and
If your VCM controller has survived, the drive should probably work .
After properly replacing it , and without connecting to the drive ,connect the power and check and compare the voltages at the three leads.(compare the voltages with the working board).
DIY has risks , be careful