I have a defective WD 1TB Hard Drive. In BIOS it could not be detected, the motor didn't work either.

Following is the details:

WD10EAVS-00D7B1
DATE: 19 OCT 2008
DCM: HANNHT2MFB
R/N: 701590

Here are the photos

What do you mean by 'the motor didn't work either', do you mean that the drive does not spin up? If it does not spin up, does it make any noise at all, soft beeping maybe? Or is it completely dead.

Check the resistance of protection diodes at D3 and D4. If the PCB is faulty then you will need a replacement and the adaptive data from within the controller chip ('M' chip) will need to be moved to replacement PCB,requiring special equipment.

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One important question, what happened before failing? Power surge, dropped, etc?

the motor did not spin up. I have checked the two diodes at D3 and D4. no fault

And what happened before? Do you know what lead to failure?

What were the multimeter readings for the Diodes D3 & D4?
Also have you tested the R64 & R67 Resistors?


Loki

There are several possibilities other than TVS that could be the problem. Internal ROM could be damaged/corrupt, there could be damage to field-effect transistor (FET) at top of PCB, damaged VCM can prevent powering...etc.

For this reason you should answer dmarques question about what happened. This can help to identify potential problem.

Agreed. We received a similar disk today which wouldn't spin up at all, as if the PCB was faulty. Turned out to be, ROM was damaged, PCB was OK...

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did you tried with similar PCB is it not spining at all ?? do you have PC3K ? Dont get soo involved in PCB Diagnostic. Find similar PCB then PM me I will walk you through.