Only one USB port - Error Message: USB Device Not Recognized

Posted on 2007-10-15
Medium Priority
Last Modified: 2013-11-17
This laptop is a Dell Inspiron 6400 with 4 USB ports in all.
Recently, most notably, after I upgraded the drivers listed in the Dell site, one of my USB ports started giving this "device unrecognized errors". It comes for flash drives whereas the USB mouse doesn't even elicit that response too. It just doesn't give even a beep sound for device plugging.
But, the mouse gets powered on (from the laser light-optical mouse). I have tried uninstalling USB hubs and controllers from both normal and safe mode. restored BIOS settings to default.
Both the mouse and the flash drives work on rest 3 ports without any problem. Also, the faulty port was the most used, until now.
I want to explore all options before considering the BIG fresh install as I have a heavily customized OS (Win XP Sp2 with all latest updates).
Question by:rookie_in
LVL 14

Accepted Solution

JohnnyCanuck earned 1400 total points
ID: 20083663
First, determine if its a hardware or software problem.  Download a bootable Knoppix iso and burn it to CD.  Then use it to boot your computer with the mouse plugged into the troublesome port.  If the mouse works correctly then you have a software problem and if the mouse doesn't work then you have a hardware problem.  If its a hardware problem then you are likely out of luck as these ports are not generally repairable.  If its a software problem we can probably solve it.  Let us know the results.
LVL 31

Expert Comment

ID: 20083906
One possible, repairable HW problem is foreign matter in the physical port...  E.g. lint, hair, dust; something that prevents connection on the signal lines in the USB connector. A flashlight and a magnifying glass might be helpful.
LVL 93

Expert Comment

ID: 20083996
you can also try a system restore to a previous date

Author Comment

ID: 20084468
wow! it never occured to me!! will try that out n let u know

will look into tat too

don't have restores to tat date..

Author Comment

ID: 20126448
Hey guys sorry for taking so long.

I booted the system from Ubuntu live cd and the USB failed again.

I called up Dell support and they asked me (after the usual stuff of trying to convince you everything is wrong on your part) to send in the laptop.

thanx again.

Featured Post

SMB Security Just Got a Layer Stronger

WatchGuard acquires Percipient Networks to extend protection to the DNS layer, further increasing the value of Total Security Suite.  Learn more about what this means for you and how you can improve your security with WatchGuard today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Lithium-ion batteries area cornerstone of today's portable electronic devices, and even though they are relied upon heavily, their chemistry and origin are not of common knowledge. This article is about a device on which every smartphone, laptop, an…
This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
How to fix display issue, screen flickering issue when I plug in power cord to the machine. Before I start explaining the solution lets check out once the issue how it looks like after I connect the power cord. most of you also have faced this…
Suggested Courses

599 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question