Question about Lenovo ThinkPad R51

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Usb port i constantly get a bubble saying that the usb device not recognised it has malfunctioned.the thing is that it'd be different if a device were connected.its empty n i keep getting the bubblen then i connected my ipod n it shows unknown device in the device manager,pls help

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  • Anonymous Feb 23, 2009

    i have same problem. It said usb not recognized

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  • 28 Answers

Idk about that one. i have never had a problem like that.

Posted on Jul 30, 2008

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i) try to connect pendrive to the usb ports present at backside of ur computer tower instead of usb ports present at the front panel of ur computer...............


ii) sometimes usb ports present at the front panel ofur computer might have loosen connections............


Thanking you

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The USB ports have gone bad. Just because they show up in device manager as being recognized does not mean they are working correctly. They are controlled by chips onthe motherboard and if one of those chips has gone bad, then they just won't work. The cheapest solution would be to purchase a USB card and install it, bypassing the onboard ports. Thanks and please take a moment to give this solution a rating of fixya. Thanks! :c)

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Hello ak1979 ...

1. You're plugging in your Transend USB flash drive to your computer's USB port (as you've done many times successfully before with this SAME flash drive)?

2. It says "windows not recognise usb drive due to malfunction"?
a. Is that EXECTLY what the error says?
b. Is "it" an error dialog (window that pops up), or an error message from your Windows Event error logs? If a dialog, are there any pertinent error message entries in your Windows Event (System) log [Start > Run > type "eventvwr.msc" (without quotes), then "OK"]?

Try a bit of deductive troubleshooting:
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  2. Try plugging in your USB flash drive again, but in a DIFFERENT USB port.
  3. Try plugging in ANY OTHER "known good" USB device into the same USB port(s) used thus far that failed.
NOTE: If you EVER get any indication Windows recognizes the flash drive (like no error msg, or it shows in "My Computer"), IMMEDIATELY perform a "Check Disk" on it:
  1. Start > Run... > type "cmd" (without quotes), then "OK".
  2. Type "chkdsk DRIVE_LTR: /f" (without quotes), then hit "Enter" [where DRIVE_LTR is the drive letter of your USB drive]. EXAMPLE: chkdsk E: /f
Good luck, and please post back:
  • to provide any corrections/updates/clarifications.
  • if you have any further questions.
  • to let me know how things work out.
"Today's the best day of my life...and NOW you're part of it!"

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