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PeskyBit
 Post subject: PCB replacement for WD400BB
PostPosted: July 19th, 2011, 16:56 
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Joined: June 26th, 2011, 19:38
Posts: 56
Location: United States
I have in a WD400BB (Silver I series according to SD manuals) with a burnt VCM IC. There is no visible EEPROM chip at U12, so the firmware is either in the MCU or all on the platters. Can anyone confirm if the firmware is partially embedded in the MCU and whether a straight donor board swap will work?
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thatdellguy
 Post subject: Re: PCB replacement for WD400BB
PostPosted: July 19th, 2011, 17:09 
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Joined: August 19th, 2007, 17:30
Posts: 1898
Location: In your hard drive.
Post a picture.

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PeskyBit
 Post subject: Re: PCB replacement for WD400BB
PostPosted: July 19th, 2011, 18:09 
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Joined: June 26th, 2011, 19:38
Posts: 56
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Here you go.
Attachment:
IMG_0553.JPG
IMG_0553.JPG [ 3.95 MiB | Viewed 7147 times ]


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thatdellguy
 Post subject: Re: PCB replacement for WD400BB
PostPosted: July 19th, 2011, 18:54 
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Joined: August 19th, 2007, 17:30
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Location: In your hard drive.
Simple, :shock: ROM is top left. SD tools will not help you if the PCB is dead. If this is a customers drive, sent it to a professional. :mrgreen:

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PeskyBit
 Post subject: Re: PCB replacement for WD400BB
PostPosted: July 21st, 2011, 13:40 
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Joined: June 26th, 2011, 19:38
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Cool, thanks man. I'll just have move the U2 chip over to a donor board. Totally forgot about U2! Hadn't seen one in a while.
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