I'm having problems with my computer recognizing my external hard drive

[Naomi Sheehan]

I had an external hard drive in a case, but I lost the power cord for it. When I realized that the company no longer made that power cord connection, I bought a new case. This is an old hard drive, and has gone through a couple moves. I haven't used it in probably 3 years now...
I have a 500GB Hitachi hard drive, and now it's in a rosewill case.
Now, when I plug it into the computer, it doesn't do anything. The computer doesn't even recognize a USB device has been plugged in. The drive doesn't show up on my computer or on my Disk Manager.

Is there anything I can do at this point, or is the actual hard drive bad?

Thank you!

 

[Rayven2]

It might be physical damage, you can't see it in Disk Management?

 

[Naomi Sheehan]

It might be physical damage, you can't see it in Disk Management?

Nope, not at all. The light on the case acts as if the hard drive is being accessed - it flashes like it normally would, and the hard drive doesn't make any weird noises.

 

[fzabkar]

Can you see the Rosewill encloure (USB mass storage device) in Device Manager with or without the HDD inside it?

Can you see it in USBDeview or UVCView?

http://www.nirsoft.net/utils/usb_devices_view.html
http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281- 92cdfeae4b45/UVCView.x64.exe
http://www.users.on.net/~fzabkar/USB_IDs/UVCView.x86.exe