How to retrieve data from dead hard drive?
Two articles here for you:
How To Diagnose And Fix A Dead Hard Drive To Recover Data
How To Get Data Off A Dead Hard Drive
Tell us why you think the HD is dead and we may be able to give you answer to your question.
dragonmouth is right if the disk itself is dead then your need technical company assistance
How dead is it? How did it die? The answer may help to determine further course of action.
Is it spinning and you just can't see in Device Manager?
If it is not spinning, you probably need professional help with it.