02-08-2013 04:24 AM
Welcome to BlackBerry Support Forums
Have you done a battery pull restart , do it like this while your device is Powered On remove the battery wait a min. then re-insert it back, after reboot see if problem resolves.
Try it and let us know.
02-08-2013 05:59 AM
If a Battery Pull is unable to fix the issue then please refer to this Knowledge Base :
KB29640 : Trackpad ,trackball, or keyboard not working on a BlackBerry Smartphone.
Try it to see if that helps in resolving your issue.