This is the same problem I?ve faced and I?ve sent the drives to a lab called Salvage Data Recovery Lab.
They solved my problem. Now its working fine. I even got my lost data. If you are failed get your drive repaired any where then why don?t you go recovery labs. I don?t know much about other companies or labs but since I?ve been to Salavagedata recovery labs, I would say it is reasonably economical and justifiable considering the unsurpassed level of expertise, customized solution, and quality of support and guaranty provided.
I am receiving about two of these drives daily. (Momentus 5400.2)
Without exception, they are manufactured in China, and have firmware 7.01. Also, they are all out of Mac computers.
Is anyone else coming across these? Has anyone successfully managed to repair one?