Proudfeet
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Wed Oct 28, 2020 6:08 pm

Hi,

I am trying to recover some data from a broken hard drive (Western Digital WD10EZEX) and was swapping the suspected broken pcb (REV A 2060-771829-005) out with a new one.

I was following this video (https://www.youtube.com/watch?v=Ng_0WaTzKmY&t=62s) on how to swap the BIOS chip over to the donor board when removing the BIOS chip I broke of the leg from pin 4 :cry: .

It seems like it require some rocket surgery to attach the leg back on and there's no easy way to hold it back on.

I found out that pin 4 on the BIOS chip in question (Winbond W25Q20BW https://datasheetspdf.com/datasheet/W25Q20BW.html) is the ground pin.

Can I just solder my BIOS chip to the donor board with no ground pin connected? Or is this incredibly naive and wont work?

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pclab
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Thu Oct 29, 2020 4:12 am

Hi

The best way is try to read the ROM with a ROM programmer (try to make contact between the pins) and make a copy.
After that you can retry to solder it to donor PCB or take it to someone a little more experienced with soldering and he might still solder it.
If the ROM is lost/danified it still will be recoverable, but it will also increase a lot the price of the recovery.
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lcoughey
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Thu Oct 29, 2020 11:51 am

If your data is of any value to you, it is best to stop and consider sending to a data recovery professional and be very thankful that your hard drive is a Western Digital and not a Seagate.

Proudfeet
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Thu Oct 29, 2020 4:09 pm

Thanks, yeah I think it might be beyond my amateurish capabilities. I might end up sending to a repair shop thanks for the advice.

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Jared
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Thu Oct 29, 2020 6:23 pm

Hopefully, there is a copy of the ROM modules in the service area. I can't recall ever needing to rebuild the ROM of a Tressels family WD drive (they're pretty uncommon) so I can't remember offhand if they have a backup of it.

What was originally going on with the drive before you attempted the PCB replacement?

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LarrySabo
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Thu Oct 29, 2020 7:25 pm

Can you post a clear, close-up picture of the ROM?

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lcoughey
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Fri Oct 30, 2020 7:06 am

I don't recall ever seeing a backup copy of the ROM in the SA when a U12 is present.

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pclab
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I broke the ground pin off of a BIOS chip (Woops). Will it still work?

Fri Oct 30, 2020 7:57 am

Just checked on a WD10EZEX-75ZF5A0 and I have a 109.rpm backup...
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