I have a PS2 Compaq MX-11800 combination keyboard with trackball mouse.
The keyboard/TB mouse work find on my HP xw6000 PC running XP Pro SP3 and will work OK in combination with a USB mouse (not that I want both).
When the keyboard/TB mouse are connected to my HP Pavilion t645.uk PC running XP Pro SP3, the trackball will not work, although it appears in device manager as a PS2 mouse without showing any issues.
On both PC's the resources and drivers appear to be the same and a separate PS2 mouse connected to the HP Pavillion works. I've checked the physical PS2 socket on the HP Pavillion and closed up the socket recepticals just in case, but still no joy.
I've done alot of searching on the net but so far without success, therefore, any suggestions or help would be much appreciated.