My WD1600BB-22GUAO failed. I found the logic board was very hot to touch and when on I heard a very slight hum. Thinking I fried the logic board, I went and purchased another for the WD1600BB-22GUAO, thinking that all boards made for this drive are compatible. I swapped out the two boards and and placed the drive in an enclosure. When I turn on the drive the disk appears to be spinning but I hear 2 second intermittent clicks. The drive is not being recognized by the computer. After careful inspection of the logic boards I saw several discrepancies. Far from being and expert in the field I decided to come hear to be educated.

I noticed that the one had a S/N # 2060-001266-001 REVA donor is 2060-001265-001 REVA

The old board is has a tag V7335 the donor has V7122.

Now if the logic board is the cause of the problem or if I have other issues with this drive.

Got a quote online from a Data Recovery service saying that it would cost 550 to resolve the problem.

Can someone tell me if the discrepancies in the boards are causing my problem, and if getting the exact board would possibly correct the problem. Thanks for your help!

Can you upload a detailed photo of the component side of the bad board?

These are photos of both PCB's.

I suspect you need to transplant the serial EEPROM chip at location U12, above the WDC MCU, from patient to donor.

If you are not comfortable with soldering, ask your local TV/AV repair shop to do it for you.

Yes, that is required.

If it's "just" a bad PCB then that should do the trick

Good luck

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Seeing the hole on the mcu I think a good dose of luck is needed...

The MCU operates off two supply rails, Vcore (~1.2V) and Vio (2.5V or 3.3V ?). The EEPROM would be powered from the Vio rail.

Measure the resistance between the EEPROM's diagonally opposed corner pins (pins 8 and 4). Those will be the Vio and Ground pins.

Both pcbs are compatible .

Just an aside, I tried to outsource some of my soldering jobs to a TV/AV repair shop in the past. The guy said he has 23 years of experience and was quite capable. He promptly fried my PCB with one of the worst soldering jobs I've ever seen.

Moral of the story: Make 'em prove they can solder BEFORE they touch your board.

At Western Digital's forums there is an example of soldering work done by a large professional (?) data recovery company. This company has offices all over the USA and Canada, and an impressive web site.

Unfortunately their work was less than impressive. In that particularly example, someone had [neatly] replaced two TVS diodes with wire links.

I'd say that nobody's workmanship, or assumed knowledge, can be accepted at face value. In fact, from what I've seen, the loudest vessels are often the emptiest.