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HddDonorMarket
 Post subject: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 7:48 
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Joined: June 16th, 2018, 12:09
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My problem seeing at picture

Can I read bios with wiring. And wiring points??

Attachment:
20220530_150126.jpg
20220530_150126.jpg [ 1011.17 KiB | Viewed 5102 times ]

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Lardman
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 8:59 
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You can either move the mcu or fix the pcb. It looks a burnt mess but have tried clearing it off - is there any actual pcb damage, I assume you have a donor for replacement parts.

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HddDonorMarket
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 9:09 
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I have swapped this components. nothing changed
Attachment:
Adsız.jpg
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unknown
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 9:35 
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Joined: October 21st, 2007, 8:48
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Replace the entire PCB and generate ROM from SA.
I can see it's 2060-701444 from sequoia drive 160 GB, Am I right?
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HddDonorMarket
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 9:53 
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Joined: June 16th, 2018, 12:09
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WD3200AAJS-65VWA0

MRT has bug when writing ROM to internal ( embedded)
I have reported 2 years ago still same.(writing FF FF FF to first sectors)
Attachment:
no external ROM chip write with boot mode.jpeg
no external ROM chip write with boot mode.jpeg [ 173.79 KiB | Viewed 5075 times ]


unknown wrote:
Replace the entire PCB and generate ROM from SA.
I can see it's 2060-701444 from sequoia drive 160 GB, Am I right?


2060-701444 yes congragulation to you : )

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fzabkar
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 13:30 
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Write the regenerated ROM code to a working donor HDD in SATA mode.

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HddDonorMarket
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 19:09 
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fzabkar wrote:
Write the regenerated ROM code to a working donor HDD in SATA mode.

I lost my mind. Thats true .
I would try it. Tested a PCB ( diffrent number) has internal ROM. Writing properly in SATA mode.
Thank you for awaking me : )

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fzabkar
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 30th, 2022, 19:16 
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Be aware that your PCB has a damaged Vcore supply and a damaged preamp supply. The latter may mean that your preamp is also damaged. I would measure the preamp resistances at your HDA pins.

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Amarbir[CDR-Labs]
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 31st, 2022, 5:00 
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Location: CDRLabs @ Chandigarh [ India ]
fzabkar wrote:
Be aware that your PCB has a damaged Vcore supply and a damaged preamp supply. The latter may mean that your preamp is also damaged. I would measure the preamp resistances at your HDA pins.


Well Frank,
Preamp resistance on HDA pins will differ from HDD to HDD right ,But one might find out what pins they are by seeing the PCB ,In this case which pins do you think we should test

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fzabkar
 Post subject: Re: Burned WD PCB no external bios chip. I need help
PostPosted: May 31st, 2022, 13:58 
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Pins 4 and 6 appear to be the preamp supply pins.

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