Question about IBM ThinkPad T21 2647 Notebook

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IBM T21 usb issue

When any usb device is plugged in I have an error USB Device Not recognized and my device manager reports unknown device please advise

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  • brussells Apr 06, 2008

    the OS is windows XP sorry, but fault has been resolved by replacing the usb/video/parallel/serial/AC/nic/modem ports pcb





    Thank you




  • ttruex62 Feb 11, 2009

    Running Win 2k, same issue- plug in a mem key, it pulls up an unknown device, then tries to install the driver, only to kicj it out as unrecognized. USB no worky at all.

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U have to install drivers for usb connections.
i guess u have 98 version of windows. if u have windows 98 operating system u have to have install drivers for every USB devices.

feel free to ask me questions regarding this answer
chirag

Posted on Apr 04, 2008

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1 Answer

Laptop not recognizing device when plugged into laptop how to fix


The computer is not recognizing the device because the appropriate software or driver is not installed on the device.

Most of the time when you connect a smartphone into a compatible laptop the device drivers or software automatically install, so the laptop may recognize the smartphone.

Here are some possibilities as to why the device is not recognized.

1) The USB port is bad.
2) The USB port is not activated
3) One of the devices does not support the other

Here are a few possible troubleshooting solutions:

1) Go to the smartphone manufactures website and download and install the updated device driver and software then plug in the device to see if it is recognized.
2) (if Windows OS) Go to the Device Manager to see if the device is showing up when it's plugged in. If you see the device in device manager right click the device and choose to update the driver.
3) (if Windows OS) Additionally, in device manager you can check your device's USB ports to see if there is an issue with the ports that may be resulting in the smartphone not being recognized. You can choose to re-enable the USB ports or update the software for the USB ports.

Hopes that helps resolve your issues.

Open Device Manager Windows Help

Nov 07, 2015 | Acer PC Laptops

1 Answer

Non of the 3 USB ports works anymore for unknown reason


ok, the answer is pretty simple, ur usb ports connect to a internal hub, that hub is what has malfunctioned, u need to reinstall that device's driver though the device manager on vista, go to start, type device manager in the search box, click device manager in the list, a uac query will appear, click continue, on device manager go to universal serial bus controlers and click the +, right click the usb root hub and uninstall it, repeat that for all of the usb root hubs, then restart ur pc, it will automatically reinstall the devices with a fresh driver, plug in your usb device and it should work, have a great day and happy holidays

Dec 31, 2009 | Toshiba Satellite A135-S2276 Notebook

1 Answer

I have a toshiba satellite l355. Recently 2 of the


It all depends on the device you're connecting. If it a flashdrive, and get the same error, you might wanna uninstall the USB under device manager and re install it back.

Hope this helps.

Dec 19, 2009 | Toshiba PC Laptops

1 Answer

Usb device not recognize


You mentioned that you uninstalled the unknown device from the Device manager. If you uninstall it then connected your usb flash drive you will see an error again on your device manager. This means that the driver for your usb port is not properly installed.

To install it, visit dell website, look for the model of your machine and locate the driver, download it then install from your machine.

Jun 02, 2009 | Dell Inspiron 6400 Notebook

1 Answer

How to install hi-speed usb to T21


You don't have the hardware, when you do, xp will install the driver automatically. You can get a PCMCIA card with usb 2.0 and plug it in the slot in the side, around $15 should do it and it is over 20 times faster than 1.1

Mar 12, 2009 | IBM ThinkPad T20 2647 Notebook

2 Answers

Thinkpad T20 won't recognize usb port


You can get a PCMCIA adapter with 4 USB v.2.0 slots on eBay. It requires power from the USB port on the laptop, but the pigtail connector is included. Works like a charm! Comes from China just like everything else in this country.

Nov 16, 2008 | IBM ThinkPad T20 2647 Notebook

1 Answer

Usb 4ports malfunction.not recognized.


Check if the USB drivers installed properly form device Manager in control panel.
If so please update driver from Toshiba web.

Nov 15, 2008 | Toshiba Satellite A135-S2386 Notebook

1 Answer

Pentium III 800 mhz T21 Thinkpad Internet connection problems


why fight it , let it be on com 1 then,
go into the bios and disable the serial ports .
that may be the easiest fix as long as you don't need the serial port for anything.
but if you have a serial mouse oh boy.

May 13, 2008 | IBM ThinkPad T21 Notebook

4 Answers

Pccard connect card option vodafone


some times the computer can not give the drive letter to asigne automatically like D:/ or E:/ or your computer does not support that usb driver ok you can make manual changes or detection just go to control panel, administrative tools, computer manager, storage , disk management, and you'll see on the right side at the top all the devices that they are recognized by the computer and at the battom you'll see all the devices plus the one does not have a letter assigned click on the one has no letter or it seds unrecognized with the right botton mouse so you'll see the list of options do format and change driver letter path check it and assigne the letter to be recognized by the system

Dec 04, 2007 | IBM ThinkPad T21 Notebook

2 Answers

Power Surge error message


Hello,

 

 

I guess that this could be your error message:

"Error message when you wake up a Windows XP-based computer from hibernation or from standby: "Power Surge on Hub Port: A USB Device has exceeded the power limits of its hub port"

 

If it is the case, please try below solution:

 

SYMPTOMS

 

When you wake up a Microsoft Windows XP-based computer from hibernation or from standby, you may receive the following error message:

 

Power Surge on Hub Port: A USB Device has exceeded the power limits of its hub port. This error message is displayed even if there are no USB devices connected to the computer.   WORKAROUND loadTOCNode(1, 'workaround'); To work around this issue, disable the USB 2.0-enhanced host controller.

Note When you disable the USB 2.0-enhanced host controller, you lose USB 2.0 functionality. That is, you revert to USB 1.1 functionality.

To disable the USB 2.0-enhanced host controller, follow these steps: 1. Right-click My Computer, and then click Manage. 2. Under Computer Management (Local), click Device Manager. 3. In the Device Manager pane, expand Universal Serial Bus controllers. 4. Right-click the USB 2.0-enhanced host controller, and then click Disable.

Note The name of the USB 2.0-enhanced host controller may vary. 5. When you receive the confirmation message, click Yes. 6.

Close Device Manager.

 

 

I hope that this should resolve the issue for you.

 

 

Please let me know the result. 

 

you can mail me at thumuvikram@rediffmail.com for any further assistance on this issue.

 

I'll be glad to help you.

Oct 18, 2007 | IBM ThinkPad T43 Notebook

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