computer doesn't recognize external hard driv

Wd / Essentials hard drive
November 4, 2010 at 11:39:28
Specs: Windows Vista
my computer won't recognize my external hard drive. it has worked fine until today. It appears to power up just fine but when plugged into the computer it is not being recognized. Help!

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November 4, 2010 at 13:22:09
Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:

Check out that and all the links referred to in that first.

Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.

If you have a desktop computer, Note that I answered a Topic on this site recently where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.

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