Posted 30 April 2006 - 02:31 PM
I have a DELL Latitude C640 laptop which has a single USB port as stand alone and 2 ports when in docking station. I require the use of several USB attached devices when docked, keyboard, mouse, printer, MP3 so bought a universal 4 port hub to expand capacity. This device works on my other laptop and 2 other PCs in the house but when I connect to the C640 I get the error message showing device not working. All USB devices (keyboard, mouse, printer, MP3) connect and work OK when connected directly to the ports in the docking station but not when the 4 port hub is attached. I have also tried to connect the USB mouse using a USB->PS2 adaptor and it does not function. When the USB hub is connected the indicator light comes on to show in use but Windows does not recognise it. I have checked the USB drivers for my C640 and compared them to the ones on one of the working PCs and they appear to be the same versions, although I do not know ALL the ones I should be looking for.
I am running Windows XP.
Any suggestions will be greatly appreciated.