Then you are likely exceeding the ability of the port to provide enough
power for everything you plugged in. Use a powered hub instead.

allanc wrote:

> I found out that I can get it to work if I leave at least one other
> USB device *not* connected to the computer.
> As soon as I connect that printer, I get an 'unknown device' error on
> the printer.
>
> On Feb 7, 10:54 pm, Karl Snooks <KarlSno...@discussions.microsoft.com>
> wrote:
>
>>allanc,
>>The 4-port usb hub on your monitor-does the hub itself receive power from
>>your computer or from the usb port on your computer? Here I'm speaking only
>>of power for the hub itself and not for the monitor.
>>
>>Try, using Device Manager, disabling all usb ports except for the one
>>feeding the monitor. If that works, then reenable other usb ports on your
>>computer one at a time.
>>
>>karl
>>
>>
>>
>>"allanc" wrote:
>>
>>>I am not sure what you are asking me.
>>>You mean the monitor?
>>
>>>On Feb 7, 10:03 pm, Karl Snooks <KarlSno...@discussions.microsoft.com>
>>>wrote:
>>>
>>>>Allanc,
>>>>Your laptop has a limit on how much power it can supply to USB ports and
>>>>there is a limit on the number of root usb hubs. Does your new hardware have
>>>>its own supply for the USB ports which it supplies?
>>>>Karl
>>
>>>>"allanc" wrote:
>>>>
>>>>>I have a 5 year old desktop (XP PRO sp2) with 6 USB ports in total (4
>>>>>in back, 2 in front).
>>>>>The 4 in back are 2.0 but I am not sure of those in front.
>>
>>>>>I have not had a USB issue until recently when I changed my monitor to
>>>>>one with 4 built-in USB ports.
>>>>>I installed the monitor and software according to the directions.
>>>>>I connected the USB cable to the back of the computer.
>>>>>However, everytime the cable is connected, I am getting errors such as
>>>>>'USB device not recognized'.
>>>>>The device manager also shows unknown devices.
>>>>>I delete the unknown devices and then try connecting the cable in a
>>>>>different order such as before/after monitor is powered up, before/
>>>>>after computer is powered up, etc.
>>>>>I have also disconnected the power cable to the computer (a suggestion
>>>>>from a computer help forum).
>>
>>>>>The USB cable from monitor to computer is now disconnected.
>>>>>All USB devices that were connected at the time the monitor was
>>>>>installed function OK (such as keyboard, mouse, printer).
>>>>>However, a USB stick that I have used many times now displays an error
>>>>>'USB device not recognized' whenever I connect it.
>>>>>I have tried updating the USB driver but a message similiar to 'You
>>>>>are already using the current driver' is displayed.
>>
>>>>>All suggestions are appreciated.
>>
>>>>>Thank you in advance.- Hide quoted text -
>>
>>>>- Show quoted text -- Hide quoted text -
>>
>>- Show quoted text -
>
>