Hi

I bought WD Essentials 1TB and it worked fine until I used wrong power supply (from netbook) and it stopped working. I opened the black case and found WD Cavier Green SATA drive. I took it out and bought IOMAX usb connecter for sata and pata. I tested first with PATA drive and it worked fine but when I connected WD Cavier drive (taken out from WD essentials) the power supply just turn itself off for no reason. I tried again and as soon as I connect the power cable with HD the light on adapter turns itself off. can someone help?

Search forum for TVS.

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http://www.datasaversllc.com

You have probably shorted the 12V TVS diode.

If you have a multimeter, measure the resistances of diode D4 and resistor R64 in the top right corner of this photo:
http://img543.imageshack.us/img543/9545/best13.jpg

If the protection diode did its job, then all you will need to do is to snip it out.

If all else fails, then you will need to transfer the 8-pin serial flash chip at U12 to a donor PCB. Some PCB suppliers include such a firmware transfer service for US$10.

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A backup a day keeps DR away.

I wonder what percentage of ROYL drives have a U12 ROM?

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Buy your friends Toshiba\Hitachi and your enemies Seagate.