Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have a problem with an LG external hard drive. Every time I connect it to a PC or a laptop the following error message appears:

"USB Device not Recognized. One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it."

The cable is connected and the power LED is on.

How can I troubleshoot or fix this?

share|improve this question

migrated from stackoverflow.com Feb 27 '11 at 14:23

This question came from our site for professional and enthusiast programmers.

2 Answers 2

up vote 0 down vote accepted

Is the drive powered by the USB bus or by an external power adaptor? If it's powered by the USB bus it should have been provided with a special USB cable having two connectors at one end. This cable should be used with both connectors plugged into the computer so that it can get twice the power from the USB bus. If it's not getting enough power, it may not be able to operate properly.

If it's an external power supply then I'm with edusysadmin - try connecting the drive direct to a computer to check it's working OK.

share|improve this answer
    
interesting, can you name any models like that? 2 usb ports for extra power? –  barlop Feb 28 '11 at 0:25
    
@barlop - We use a Transcend 2.5" USB enclosure at work that has a USB Y cable to get extra power....most of the time we find that its not needed though. newegg.com/Product/Product.aspx?Item=N82E16817349001 –  edusysadmin Feb 28 '11 at 2:36

It's either the hard disk drive within the enclosure that has failed, or the enclosure has failed. Take the drive out of the external enclosure and test it directly into your computer.

If computers still don't recognize the drive, the drive has failed. Otherwise the enclosure is the issue.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.