Could possibly be a matter of cleaning it. http://www.youtube.com/watch?v=FnVoCAKnfjQ&feature=fvw or you may need to replace the trackball which is very simple: http://www.youtube.com/watch?v=KvYbwlQL9Pg hope this helps
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Could possibly be a matter of cleaning it.
http://www.youtube.com/watch?v=FnVoCAKnfjQ&feature=fvw
or you may need to replace the trackball which is very simple:
http://www.youtube.com/watch?v=KvYbwlQL9Pg
hope this helps