10-18-2012 03:01 AM
Welcome to BlackBerry Support Community Forums
Look at this RIM'sKnowledge Base Article and see if that helps , if that fails yes you may need to replace your Device Keypads.
KB29640 : Trackpad ,trackball, or keyboard not working on a BlackBerry Smartphone.
Click " Like " if you want to Thank someone.
If Problem Resolves mark the post(s) as " Solution ", so that other can make use of it.