Try the posts bu fzabkar he is about the only one who understands these boards. You might be able to just bypas a burnt diode on athe board. try this one for a start http://community.wd.com/t5/External-Drives-for-PC/connected-wrong-power-supply-to-3TB-WD-My-Book-Essential-any-way/td-p/837943
Joe
