My dell m6500 started acting up the point stick all of a sudden stopped working and is not being detected at all. The touch pad now won't double tap or scroll and zoom. I have tried uninstalling the drivers and reinstalling them but it did not fix it. I ran tests on motherboard and other components and they all passed. I ran the dell diagnostic f12 key one and from cd. I even ran the program that scans hardware support assist and still got no errors. There was this dell forum I stumbled apon that had this issue or close to it and the conclusion was a motherboard failure. But everything passed and I do not have anything to swap out and test.