my external hard drive (WD my passport) not detected on my laptop

[nhaghjoo]

Hi
my 500GB WD Passport is not being detected by my laptop when plugged in (by USB). A LED at the side of the external hard drive indicates that it is being powered on even though the computer shows no sign of detection (no sound indication; nothing showing up in My Computer)
I can feel the drive motor start up.(the vibration).
my machine's BIOS detect the drive. but I can't see it in device manager.
my machine use other devices properly.
and I checked my drive in 2 other laptops( both was windows 7) and both failed to detect my WD Passport.
could anyone help me?
thanks

 

[marsmimar]

Hello nhaghjoo and welcome to Seven Forums.

It's possible that your external hard drive doesn't have a drive letter assigned. If you could post a screenshot of Disk Management it might provide a clue as to what's happening.

http://www.sevenforums.com/tutorials/274797-disk-management-post-screen-capture-image.html

 

[nhaghjoo]

thank you a lot

 

[Mark Phelps]

You have to scroll down -- to see if the drive is shown at the bottom of the list.