Good day to all;
I messed up huge and used an incorrect power source on 2(two!!) of my external HDDs recently. After some crying, I did quite a bit of snooping on the interwebs wrt to my misfortune and I found myself at a point where I could use some knowledgeable advice(pictures below).
Here's my side of the story, after wrong PS was used:
WD hard drive is a 4 TB HGST HD - was continuously causing new hardware found/disconnected in Win10 alerts. Only sound was present, no actual HD was seen at any point in device manager. (alerts may have been happening while wrong PS was connected, not 100% sure on this)
Took it out of the original case, plugged into a docking station - no effect. Tried a new external HDD case - same deal: no sound(neither win10 or HD spinning), no signs of life. No lights of any kind.
Seagate HDD is a 5 TB HD, some very faint clicking noise when power connected, did not sound like drive was spinning or trying to spin.
Same deal - tried docking station, and another external HDD case - no effect, same as above. No clicking noise, no lights, no signs of life.
At this point I took off both PCBs(took a long time: no torx, but I was determined), to see if there are any visible and obvious signs of my stupidity anywhere on the boards, but unfortunately it could not be seen with naked eye. Markings on the board are poor to non-existent. I could use some direction on what components i need to check and what else i need to do before i plug in the HDD into the (proper) PS long enough to get the data off of it. Any advice will be greatly appreciated.
Here are the pics:
PCB from WD HDD(110 0A90379 01), which seems to have been made by hitachi? In either case, I was NOT able to find that exact same board online anywhere. Either revision or something else was always different. I measured the bottom left diodes(hopefully) that appear to be shorted. Third larger 'presumably' diode gives 1.27 in one direction and .528 in another.
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Here's a picture of the same board that i found online. Not identical in markings, but components look the same (for better clarity)
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Here's the Seagate board (100721570 rev E):
I was able to find that exact(allegedly) board online. I will have to find a local soldering guru to transfer the bios chip, but aside from that I would still like to attempt to see if I could rectify the problem singlehandedly. Far left diode appears to be shorted.
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better quality pic found online:
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Any advice or insights would be hugely appreciated.