Question about PC Desktops

1 Answer

Usb hub root with an exclamation mark

Hi,
my usb hub root is indicated with an exclamation mark in my device manager list bcoz of which my mobile phone is not detected in my pc when i connect it . kindly tell me th ebest solution for this problem..

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 85 Answers

What phone do you have? I know that with my phone, if I want to connect it to my PC via USB to transfer files and stuff, T-Mobile wants me to cough up and spend money on a cd that has the drivers for the phone on it.

Posted on Mar 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have sahara n1356 laptop which freezes mouse and keyboard when i start it. what could be a problem


Try following tips:
Try to connect your keyboard and mouse directly to your laptop's USB ports (instead of using the USB hub) and see if they still freeze.
OR
It sounds like you're using an unpowered hub, which in my experience tends to cause most common errors with USB peripherals. It's definitely not recommended to connect any USB devices which aren't supplied with a power adapter (for instance some 2.5" external HDs and those small photo printers). These sort of devices should be connected directly to your laptop at all times.
You could also consider buying a powered hub, i.e. an USB hub which draws its power from a separate power adapter (and not your single laptop USB port).

if it doesn't work you can try this..

Click Start, and type device manager in the Start Search box.
Click Device Manager in the Programs list.
If you are prompted for an administrator password or confirmation, type your password or click Continue.
In the Device Manager dialog box, expand Universal Serial Bus controllers.
Right-click USB Root Hub and then click Properties.
In the USB Root Hub Properties dialog box, click the Power Management tab.
Remove the check from the Allow the computer to turn off this device to save power check box. Repeat steps 1 through 4 for each USB Root Hub listed in the Device Manager.

Under Power settings, check the 'USB settings' -> 'USB selective suspend settings' and make sure it is disabled.
Check Thumbnail, highlighted: Open Device manager, Double click on Universal Serial Bus controller at the bottom, Double Click USB Root Hub, Click Power Management on top right, Uncheck Allow Power...
Hope it works for you.

Sep 20, 2011 | Dell Dimension 8300 PC Desktop

Tip

USB PORT FIX WIN 7


Method 1
*For Microsoft Windows Vista (and windows 7) Click Start, and type device manager in the Start Search box. Click Device Manager in the Programs list. If you are prompted for an administrator password or confirmation, type your password or click Continue. In the Device Manager dialog box, expand Universal Serial Bus controllers. Right-click USB Root Hub and then click Properties. In the USB Root Hub Properties dialog box, click the Power Management tab. Remove the check from the Allow the computer to turn off this device to save power check box. Repeat steps 1 through 4 for each USB Root Hub listed in the Device Manager.

Under Power settings, check the 'USB settings' -> 'USB selective suspend settings' and make sure it is disabled.
Check Thumbnail, highlighted: Open Device manager, Double click on Universal Serial Bus controller at the bottom, Double Click USB Root Hub, Click Power Management on top right, Uncheck Allow Power...
Method 2
*You can disable the USB Selective Suspend feature as a workaround by editing the registry. The USB device may become unresponsive because of a race condition in the Selective Suspend feature. The Selective Suspend feature suspends the USB device to efficiently maintain battery power by enabling the computer to turn off the USB device. However, sometimes this feature may not correctly wake up the USB device. Therefore, the USB device is unresponsive when you try to use it. You might want to disable this feature for server products where power management is not important or required. *To disable the Selective Suspend feature, follow these steps: Click Start and then click Run. Note If you are running Windows Vista, click Start, and then use the Start Search box. Type reedit, and then click OK. Registry Editor opens. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Servic es\USB If the DisableSelectiveSuspend registry entry is present, double-click it. If it is not present, create the entry. To create the entry, follow these steps: On the Edit menu, point to New, and then click DWORD. Type DisableSelectiveSuspend, and then press ENTER. On the Edit menu, click Modify. In the Value data field, type 1 to disable the Selective Suspend feature, and then click OK.

on Feb 14, 2010 | PC Desktops

Tip

Resolving intermittent Windows USB device issues


PROBLEM: USB Devices (Both internal and external) work intermittently.
DISCUSSION: Issue is caused by Windows power management disabling the USB Root Hub to save power (This option is on BY DEFAULT in all Windows installations)
RESOLUTION: Open Device Manager, scroll down to the USB Root Hubs Listings (There may be as few as two most I've seen is 7) Right click each hub, select Properties on the drop down menu, then click the POWER MANAGEMENT tab. There you will find a check box to allow windows to turn off this device to save power. Uncheck the box and close the window, repeat on remaining USB Root Hubs, then reboot.
This will resolve most intermittent USB device issues.

on Dec 03, 2009 | PC Desktops

1 Answer

One day, I uninstalled USB Mass Storage Device along with a bunch of other ones (eg. USB Root Hub & some other ones) The USB Root Hubs and the other ones re-installed but the USB Mass Storage Device...


right click my computer, device manager,you should now see a list roll down list till you see universal serial bus controller,click on this and a list will drop down, the first 1 you see in list right click and pick update driver software.keep going down list doing the update software driver .that should reinstall missing usb storage driver .try pluging in an external hard drive if it reads drive and you can put and remove things then its already install but not showing.

Aug 08, 2011 | Compaq PC Desktops

1 Answer

Gateway 310 s won't recognize a cd


Hello,
Method 1: Initiate recognition of the USB device by using Device Manager loadTOCNode(2, 'workaround'); To initiate recognition of the USB device by using Device Manager, follow these steps:

1. Click Start, click Run, type Devmgmt.msc, and then click OK. The Device Manager window opens.
2. Click to select your computer as the location for the scan.
3. On the Action menu, click Scan for hardware changes.

Windows XP recognizes the new device.
4. Close the Device Manager window.

If this method resolves the issue, you are finished.

If this method does not resolve the issue, go to method 2.
Method 2: Disable power management of the USB hub loadTOCNode(2, 'workaround'); Note If you perform the following procedure, you may also reduce the battery life on a portable computer.

Use this method if method 1 does not work. To disable power management of the USB hub, follow these steps:

1. Click Start, click Run, type Devmgmt.msc, and then click OK. The Device Manager window opens.
2. Expand Universal Serial Bus controllers.
3. Right-click a USB Root Hub in the list, and then click Properties. The USB Root Hub Properties dialog box is displayed.
4. Click the Power Management tab.
5. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.
6. Repeat steps 3 through 6 for each USB Root Hub in the list.
7. On the Action menu, click Scan for hardware changes.

Windows XP recognizes the new device.
8. Close the Device Manager window.

If this method does not resolve the issue, go to method 3.

Click Start, click Run, type Devmgmt.msc, and then click OK. The Device Manager window opens.
Uninstall all the usb controller from USB controller
and now restart the computer.

If this method does not resolve the issue, go to method 4 .
Method 3: Restart the computer loadTOCNode(2, 'workaround'); To initiate recognition of the USB device, first unplug the USB device and restart the computer. Then, wait five to ten seconds before you plug the USB device into the computer or hub. Windows XP recognizes the new device.

Hope this helps.

Jan 14, 2011 | Gateway 310 S PC Desktop

1 Answer

Usb port not recognized any device


  • Don't worry just follow the simple steps and get rid out of that problem
    • Unsecure or Loose Connection
    Unplug the presently connected USB device (if any). It is quite possible that the connection is not secure and has become loose. Re-plug the USB device tightly and firmly into the USB port. This is one of the most common reasons for an error in detecting a USB device.
  • Scan for Hardware Changes in Device Manager
    Use the Device Manager to scan for new and recently installed hardware. From the Start menu, select the Run option. In the pop up box, type in Devmgmt.msc and then click Ok. From the Action menu, click Scan for hardware changes. This will make Windows scan & recognize any new devices that are installed. Now, close all opened device managers and control panels. Now, follow the above step and see if your computer detects the USB device.
  • USB Hub Power Management
    Disable power management of the USB hub. To disable the power management on the USB hub, follow these steps; Click Start, and then click Run. Type devmgmt.msc in the popup box, and then click Ok. Expand the Universal Serial Bus Controllers' node, and then follow these steps for each USB Root Hub that is listed.

    1. Right-click the USB Root Hub and then click Properties.
    2. Click the Power Management tab.
    3. Click to clear the Allow the computer to turn off this device to save power check box, and then click Ok.
    Note: If you perform the following procedure on a laptop computer, you may reduce the battery life.
  • Sometimes, simply unplugging the USB device and turning off the computer for twenty minutes and then restarting may solve the issue. If none of the above options have solved the problem, check the manufacturer's website for new driver information. It is possible that your drivers need to be updated. There could also be a possibility of hardware failure, which needs to be checked by a hardware expert.
Please rate me if this solution works for you

Thanks......Have a great time

Jun 29, 2010 | Acer Veriton 7600GT PC Desktop

2 Answers

Dell 4600 usb ports not working


Have you gone to Start>Control Panel>Device Manager to see if there are any yellow exclamation marks in front of the usb devices?

Oct 25, 2008 | Dell Dimension 4600 PC Desktop

1 Answer

I plugged my Memorex TravelDrive into my computer. It has always worked perfectly. This time I got the message that the USB device was not recognized and I can't get into my files.


THE FOLLOWING IS COURTESY OF MICROSOFT Help and Support

When you plug a USB device into a Windows XP-based computer immediately after the computer comes out of standby (S3) or hibernate (S4), the computer may not recognize the USB device. When this issue occurs, the USB device may be listed in Device Manager as an unknown device, and you may receive the following warning message:
Unrecognized device has been found.

This issue occurs because, when the computer comes out of S3 or S4, there is a five- to ten-second period when the selective suspend feature of the USB driver will interfere with detection of a new USB device connection. The time period depends on several factors. This includes the following factors:• Host controller hardware
• Attached hubs
• Attached devices
• USB driver versions
• Support for USB 2.0
• Additional system hardware or configurations that may change the timing
There may be other reasons that a USB device is not detected

Method 1
loadTOCNode(2, 'workaround'); After the computer comes out of S3 or S4, wait five to ten seconds before you plug the USB device into the computer or hub.

Method 2
After the computer comes out of S3 or S4, unplug the USB device, and then plug the device back into the computer or hub.

Method 3
Use the Device Manager to scan for new hardware. Follow these steps: 1. Click Start, click Run, type Devmgmt.msc, and then click OK..
2. On the Action menu, click Scan for hardware changes. This causes Windows to recognize new devices.
3. Close Device Manager and Control Panel.

Method 4
Disable power management of the USB hub.
Note If you perform the following procedure, you may also reduce the battery life on a portable computer.
To disable power management on the USB hub, follow these steps: 1. Click Start, click Run, type devmgmt.msc, and then click OK.
2. Expand the Universal Serial Bus controllers node, and then follow these steps for each USB Root Hub that is listed: a. Right-click the USB Root Hub, and then click Properties.
b. Click the Power Management tab.
c. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.

SIMILAR PROBLEMS AND SOLUTIONS loadTOCNode(1, 'moreinformation'); For more information about advanced troubleshooting tips for general USB problems, click the following article number to view the article in the Microsoft Knowledge Base: 310575 (http://support.microsoft.com/kb/310575/) Advanced troubleshooting tips for general USB problems in Windows XP For more information about how to troubleshoot unknown devices in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base: 314464 (http://support.microsoft.com/kb/314464/) How to troubleshoot unknown devices that are listed in Device Manager in Windows XP







Try restarting the computer with the device in. Sometimes if you clear the memory that might help (stating the machine without memory then put it back and start it again).

Jul 01, 2008 | PC Desktops

1 Answer

When i connect my hard drive to my laptop the baloon comes up saying that usb device is unrecognized.


SYMPTOMS: loadTOCNode(1, 'symptoms'When you plug a USB device into a Windows XP-based computer immediately after the computer comes out of standby (S3) or hibernate (S4), the computer may not recognize the USB device. When this issue occurs, the USB device may be listed in Device Manager as an unknown device, and you may receive the following warning message:
To work around this issue, use one of the following methods:
Method 1 loadTOCNode(2, 'workaround'); After the computer comes out of S3 or S4, wait five to ten seconds before you plug the USB device into the computer or hub.
Method 2 loadTOCNode(2, 'workaround');After the computer comes out of S3 or S4, unplug the USB device, and then plug the device back into the computer or hub.
Method 2 loadTOCNode(2, 'workaround');After the computer comes out of S3 or S4, unplug the USB device, and then plug the device back into the computer or hub.
Method 4 loadTOCNode(2, 'workaround'); Disable power management of the USB hub.

Note If you perform the following procedure, you may also reduce the battery life on a portable computer.

To disable power management on the USB hub, follow these steps: 1. Click Start, click Run, type devmgmt.msc, and then click OK. 2. Expand the Universal Serial Bus controllers node, and then follow these steps for each USB Root Hub that is listed: a. Right-click the USB Root Hub, and then click Properties. b. Click the Power Management tab. c. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.-------------------------------------------
Please let me know your feed-back.

Thanks
dilipbagdi
Technical Associate

Apr 29, 2008 | PC Desktops

1 Answer

USB devices not seen


i'm looking for those with question marks or exclamation points...

Mar 28, 2008 | PC Desktops

Not finding what you are looking for?
PC Desktops Logo

Related Topics:

46 people viewed this question

Ask a Question

Usually answered in minutes!

Top PC Desktops Experts

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18298 Answers

Are you a PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...