| | Re: Blackberry 8520 TrackPad Issue
The BlackBerry Device Software is out of date and requires an update to resolve the trackpad, trackball or keyboard issue.
Make sure the trackpad is not affected by a software freeze or an application freezing.
From the Home screen, select Options.
Ensure Trackball Audible Roll is selected.
Rapidly roll the trackball up, down, right, and left.
If an audible click is not heard, the problem may be related to a hardware issue. Please contact the wireless service provider for additional steps.