Thank you for your reply.
Yes, I tried a different computer. The cables I used work with the actual computer as well as with others. The computer does not make any sound, when connecting the drive. It is was working one week earlier because I did a backup. Due to a crash, I first tried an unsuccessful Restore. Then I reformated the (C:) drive to restore again from the (external) My Book Studio Edition. No success. Now, I reinstalled window from scratch but still I would like to restore some programs and data.
Thanks,
Jamel