Hi there brava007,
That is unpleasant.
What do you mean by the case? Have you taken the drive out of the enclosure? Did you use a third party enclosure?
If you've tried the drive with a different enclosure and cable and the drive does not even power up, then I believe it is dead.
You will need to contact a data recovery company, if the data stored on it is really important.
Have you tried to attach the drive internally with SATA and power cables?
Cheers,
D_Know_WD