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USB has malfunctioned

October 25, 2006 at 13:14:45
Specs: W2K, 600,512

Hi Guys
i bought a 3M USB Extension cable and connected it to the Back USB port on my computer. the problem is when i connect any USB device to the USB extension cable windows detects the device but then gives a message saying Unknown USB device. USB has malfunctioned.
but when i connect the USB Device (Flash drive) directly to the usb port on the front/Back of the computer it works fine.
i've tried 2x USB extensions (both are new and same make and they are a USB 2.0 Compatible)
My computer is compaq dc7100

Thanks for any suggestions
Saleh


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#1
October 25, 2006 at 15:26:58

I had a similar problem on my w2k box. I tried a USB hub and it just wouldn't work. Connecting the devices directly worked. I never found out if it was a problem in the OS, mother board or what.
Try the cables on another machine. See what happens.

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#2
October 25, 2006 at 18:24:16

Extending usb and especially firewire cables is a may-work/may-not-work kind of business. If the device on the end of the extension has its own powersupply then there is a good chance that it will work. But if the device is getting it power from the usb port then the chances are better that it will fail. You can get repeater/booster boxes for long runs of usb cable.... and they SOMETIMES work too.

But what ever the case... when buying these extensions, you should be prepared for the possibilty that you have just waisted some money.


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#3
October 26, 2006 at 12:48:56

I'm assuminmg the 3M cable is USB 2.0 compatible. Most cords that aren't marked as being USB 2.0 compatible will work anyway, but ones marked as USB 2.0 compatible supposedly have been tested and will work for sure.
If it is just a simple USB extension cable, male to female, it should work fine - if that's what it is, take it back - it's defective.

If it is a cable to a USB Hub, that's a completely different situation. There are lots of things that won't work in a port in a USB hub that work fine in a port on your mboard. More things will work in a hub if it has its own power supply so that each port in the hub can supply 5v at 500ma even if all the ports are used, but still, some things will only work properly when connected to a USB port that connects directly to a USB controller, such as the ones on your mboard, or ones connected directly to headers on your mboard, or ones on a USB controller card.


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