03-19-2013 04:06 PM
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Have you tried a Battery pull restart by removing the battery while your device is Powered on ? try it and see if your trackpad works , Or you can try to start your devive on Safe mode , if it works just do a backup of your device and you can try Updating / Reloading your device Software :
KB17877 : How to start a BlackBerry smartphone in Safe Mode.
KB03621 : How to Reload BlackBerry Device Software and application using BlackBerry Desktop Software
If those methods fails then you have to replace your trackpad .