Hi RattanKanna,
I'm not sure about your case FBWC, Capacitor.
For my case, the replacement HDD is defective before i installed it to the server.
You can look at the post on 12-15-2013 07:09 PM
Replaced the defective drive then my case is solved.
Hope you can get yours fixed soon.
Do contact HP support. They are some what quite supportive.
Prepared ADU report. They will request for it. And try to read and understand the ADU report yourself if can.
You may find the root cause yourself like for my case.
Peace.