IBM R31 local mouse stick not working

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  • burntfingers
    Senior Member
    • Jan 2011
    • 148

    #1

    IBM R31 local mouse stick not working

    I recently got 30 of these notebooks to repair and sell as used, nice for training.
    Most work just fine - after installing Windows XP & Word 2000.
    But I have three or four where the little red stick to move the mouse doesn't work.
    Already replaced keyboards and inspected the thing visually.
    Checked a few site on Google, too.
    No luck.
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  • b700029
    Banned
    • Sep 2010
    • 640

    #2
    Re: IBM R31 local mouse stick not working

    Does it not work in all operating systems e.g. if you boot a Ubuntu livecd does it still work?

    Schematic:
    http://www.4shared.com/office/USrS9klE/file.html
    (yes, these are made by Acer )

    Page 27 is the keyboard/trackpoint circuit. Looks like the trackpoint just uses PS/2 mouse-compatible signals via pins 37 and 39 of CN14 (keyboard connector). If you have a 'scope or LA you can check the clock and data lines for activity.

    (Or alternatively hook up the trackpoint pins to a PS/2 mouse port on a regular PC and see if it works.)

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    • burntfingers
      Senior Member
      • Jan 2011
      • 148

      #3
      Re: IBM R31 local mouse stick not working

      Originally posted by b700029
      Does it not work in all operating systems e.g. if you boot a Ubuntu livecd does it still work?

      Schematic:
      http://www.4shared.com/office/USrS9klE/file.html
      (yes, these are made by Acer )

      Page 27 is the keyboard/trackpoint circuit. Looks like the trackpoint just uses PS/2 mouse-compatible signals via pins 37 and 39 of CN14 (keyboard connector). If you have a 'scope or LA you can check the clock and data lines for activity.

      (Or alternatively hook up the trackpoint pins to a PS/2 mouse port on a regular PC and see if it works.)

      Thanks for the tips, much appreciated.

      Comment

      • joeyjoey
        New Member
        • Oct 2012
        • 1
        • USA

        #4
        Re: IBM R31 local mouse stick not working

        Just got an IBM R31 with non-functioning Trackpoint - guess what!? There is a setting deep in the BIOS setup involving the Trackpoint mouse, with "enable/disable" options - just click on it and set to "enable" and problem solved!

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