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..
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Re: Usb hub root with an exclamation mark
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.
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Hi there,<br />
Follow this steps,if it is not working then post back i have 3 more steps left.<br />
<li>Click Start</b>, click Run</b>, type <span>Devmgmt.msc</span>, and then click OK</b>. The Device Manager</b> window opens.
<li>Expand Universal Serial Bus controllers</b>.
<li>Right-click a USB Root Hub in the list, and then click Properties</b>. The USB Root Hub Properties</b> dialog box is displayed.
<li>Click the Power Management</b> tab.
<li>Click to clear the Allow the computer to turn off this device to save power</b> check box, and then click OK</b>.
<li>Repeat steps 3 through 6 for each USB Root Hub in the list.
<li>On the Action</b> menu, click Scan for hardware changes</b>. <br /><br />Windows XP recognizes the new device.
<li>Close the Device Manager</b> window.</li></ol>
Hope this helps.<br />
click start control panel administrive tools ,computer management ,device manager look through all of your devices if you see a yellow question mark?or exclamation mark ! or red x right click to reinstall drivers or if you can see your usb but its not working ports(com&lpt)right click update driver
if your computer came with a motherboard disk the drivers could be on it
Make sure whether USB ports are working fine or not. Or go to BIOS and check usb devices options enabled. If its enabled , restart your PC. Right click on My computer and go to manage and check device manager. If you see any yellow mark near usb devices or usb root hub you need to install chipset driver for your system mother board. If you are seeing any red mark near usb devices or USB root hub, right click on that and enable the device. If there is no mark and still your mouse doesn't work, issue with either USB ports on mother board or usb mouse.
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.
I just solved the same problem on my laptop with the help of Tata's tech support -
first, plug in the Photon plus modem, remove any other usb devices (mouse, etc)
right click on My Computer, select "manage". Click on Device Manager, expand the list of Serial Bus Conductors.
Right click on each "USB Composite hub" (not root hub) and uninstall.
after all composite hubs are uninstalled, go to the "computer" section at the top of the list in the Computer Management box. Right-click on "Computer" and click on "scan for hardware changes". Yiur system will reinstall the drivers and give you a notification at the bottom right corner of your monitor. Once u get the message "drivers successfully installed", open the Photon plus dialler and connect. It worked for me, hope it works for you too!
Right-click My Computer on the Windows desktop and then
Click the Device Manager tab to display the Device Manager
window as shown at the right. (For Windows 2000 systems, click the Hardware
tab and then the Device Manager button.
In the Device Manager list, click the + sign next to Universal
serial bus controller.
Verify that a USB host controller and a USB root hub are listed below Universal
If Universal serial bus controller, USB host controller or USB root hub
are not listed, close the Device Manager and go to USB port incorrectly configured
If Universal serial bus controller, USB host controller and USB root hub
are listed but one or more display a yellow exclamation point, go to USB controller
If you have Windows XP, right-click the Host Controller and select
Properties from the drop-down menu. If you see this status message in the
Properties window: The drivers for this device are not installed (code 28),
go to Windows XP USB 2.0 driver not installed .
If Universal serial bus controller, USB host controller and USB root hub
are listed but one or more display a red X, go to USB controller or root hub
disabled in Windows Device Manager.
port incorrectly configured in BIOS
NOTE: The procedure in this section is intended for advanced users only. Incorrect
BIOS settings could prevent your computer from starting or operating normally.
If you are not experienced in making changes to your computer BIOS, consult
your computer instructions or contact your computer manufacturer for assistance
before attempting the steps below.
Follow the instructions of your computer to view the BIOS settings. These
settings are sometimes called CMOS settings or system setup.
To view the BIOS settings, press a key, such as F2 or Delete, just after
you turn on the computer. Instructions often appear on the screen briefly
when you turn on the computer. Also check the instructions and manuals provided
with your computer.
Look for USB Interface or a similar setting in the Advanced Setup,
Peripheral Configuration or another section of your computer
Follow the onscreen instructions or read the computer documentation to enable
the USB port.
Follow the onscreen instructions to save the new settings and restart the
if it,s showing in the device manager as an exclamation mark. that means it,s found it, but can,t recognise it.
i,d suggest formatting and partitioning it, with some good software. also ensure that it,s powered via 2 usb cables to laptop, from 1 on the drive itself. some bigger hard-drives, need the extra power to drive them.